LOCKED UP BIG BLOCK 8.1L Silverado 2500 Vortec 8100 Engine Teardown!

To peruse our parts inventory and parts cars please visit www.Importapart.com or email us at [e-mail] for part inquiries.
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Today's subject is the 8.1L Vortec 8100 Big Block Chevrolet engine found in 2001-2007 Full size trucks and some SUV's. This very heavy torque house makes 340hp and 450lb ft of torque. These engines are generally though of as extremely reliable as they are low stress, low rpm engines and often used in medium duty applications like step vans, busses, and even marine applications. This particular engine was a core return at a local salvage yard. They sold a good engine and charged a core for the old one, which I bought when it was returned. I never get details on cores like this so I don't know miles, or what's wrong with it. Thats what the video is about, figuring out what happened and perhaps why.
My name is Eric and I own and run a full service auto salvage business in the Saint Louis Missouri area called Importapart. Part of our model includes buying blown up and core engines, dismantling them and salvaging the good parts to resell. We do not rebuild engines, merely supply parts to those that do!
I really hope you enjoyed this teardown and as always, I love all of the comments, feedback and even the criticism!
Catch you on the next one!
-Eric

[@whalley6044]

I'd guess oil change but not refilled. On startup no oil to mains but oil in the crank gallery would feed rods for a few seconds. Main bearing debris isn't carried to rest of the engine, stays in mains & grinds them up. Engine locked before residual lube was exhausted.

[@suterfamily5578]

I 100% agree!

[@FlattardiansSuck]

👍👍👍👍💯💯💯 I just type and commented. Took me a while to get it right. I look down and see many old school got it. Here is mine....

[@FlattardiansSuck]

OLD SCHOOL.... They have let it idle with no oil until it stopped. The big end bearings don't get used or heated much at idle while the flywheel does its job, and so a film of oil remains. But mains work as the engine comes up to temperature. The main caps definitely show heat, and this could mean many things... But its the dry crank that gives it all away. The crank shows heat sink via the bearings to the crank, BECAUSE the engine stopped with no oil in the pan, and not even enough oil vapour from the over heating to coat the crank. ?

[@poprawa]

Someone, that used the same plugs for likely 200k miles replaced oil? lol nope

[@hondamoto-rb6bk]

​@poprawa what? Jus bc someone doesn't change plugs in no way is anybody gonna assume they don't change there oil besides u lol

[@davemcdaniel4856]

The oil cooler circuit goes from the oil pump directly out to the cooler, then back to the block before lubing the mains. You can see the oil cooler lines right next to the oil filter. The oil cooler lines have a tendency to suddenly pop leaks at the rubber section between the hard lines and the hard lines at the radiator. It's about 6-10 inches long of rubber for vibration damping betweeen the 2 sections.That vibration can cause the crimps to leak over time. If it was a sudden catastrophic leak it would run all the oil directly out the line and onto the ground, lubing nothing. If it was low rpm the mains would wipe before the rods, and fairly quickly. The centripetal force of the crank rotating would fling oil out to the rods to keep them lubed at lower rpm. Higher rpm oil starvation wipes rods first due to the same reason, flings it out faster and leaves metal to metal. I've replaced a few of the oil cooler lines on 8.1s over the decades and even almost had the catrastrophic failure on my own 8.1 burb. My wife saw it start pouring out within 2 seconds of start and I shut it down. She was walking up from the front door. Luckily after being married to a pro mechanic for 24 years she knows to look for leaks and yell out "kill it!" immediately. Of course it could also be the classic oil change, new filter, forget to fill it up and it died backing out of the shop/garage. You know, the standard lube shop stuff like not putting drain plugs back, putting twice the oil in, forgetting the oil entirely, putting the oil into the transmission, not tightening drain plugs, cold revs to the rev limiter, etc. I get quite a lot of engine replacements and repair jobs from lube shops.

[@uponthemesa]

I think you have the correct diagnosis.

[@trickyricky12147]

Yep, that's why more need to do their own oil changes.

[@demo2x]

30+ years gm tech here and I concur with this hypothesis. Oil line pops, customer panics and sits on the side of the road with the engine low oil pressure light on, engine running and doesn't know what to do while starving the main bearings. I've seen that exact scenario before.

[@jlrockafella]

​@demo2x if I see no leaks and my oil light is on I check my dip stick and then replace the $15 oil sending unit sensor before driving again.

[@imgooley]

I've worked on small blocks for a long time, but no big blocks, but this is exactly what I'd assume for main bearing failure. Happens on square s10s

[@Lokisword]

The bonus scene explains why Eric is always so chill

[@honkie247]

When the crankshaft passages are full of oil and for some reason the engine loses pressure, the centrifugal force of the crank spinning pushes the oil out to the rod journals, so that the mains starve first. Notice the front main, farthest from the oil pump, was the worst bearing, and the rear bearing, the thrust bearing, was the best. Some one ran the engine out of oil and put a new filter with some oil in it (probably used oil by the look of the filter) and put some oil in the pan and tried to start it.

[@averyalexander2303]

Interesting theory, but if the engine was run without oil for long enough to spin and destroy the main bearings that badly, it seems very odd that the rod bearings would show absolutely no signs of abnormal wear.

[@randr10]

@@averyalexander2303 If they filled that filter during an oil change but forgot to refill the crankcase before starting, that would explain the whole thing.

[@averyalexander2303]

@@randr10 That would explain the filter being wet and the main bearings being destroyed, but it wouldn't explain why the rod bearings still looked virtually new. From what I have noticed, the rod bearings generally seem to wear faster than the main bearings during normal use, especially the upper halves.

[@ryancarbajal204]

Improper oil change intervals is my first thought, leading to small amounts of metal to build up in main bearings blocking the oil journal halfway through the crankshaft. That lack of oil will lead to only half of the engine with proper lube due to the cam and lifter oil journals are separate from the crank on that engine. This lack of lube will cause overheating and failure of only main bearings over time as the metal is stuck in crankshaft journals and leads to a blockage of oil ports in the crank. Another possibility is a dry start up that ran to long after an oil change without oil in it but was caught before it left shop but in the process leaving small amounts of blockage debris but not enough for a full failure until months down the line due to low lubrication in crank over time adding small amounts of metal in the meantime. None the less inadequate lubrication is the culprit causing over heating and finally a full seizure of the crankshaft.

[@petercermak1910]

SB Chevy engines require 4 psi of oil pressure to allow the engine to fire. If this thing was not refilled at the time of the oil change, I am surprised that the ECM allowed the fire command. Sad.

[@timbrown9731]

Well, that’s the nicest sounding Stock C5 I’ve ever heard

[@michaeljenkins4895]

Best engine i have ever had.285000 miles .Towed 16000 lbs for over 7 years with only brakes tires and one crank sensor.I wish i had never sold it.😢

[@J.R.in_WV]

The only GMT-400’s that got the 8.1 are the “1.5 ton” 3500 HD straight frame / I beam front axle Cab and chassis trucks. They were basically a 4500/5500 just named differently and the reason they built them with 8.1’s and Allison’s for a couple years is they didn’t have the new C4500-5500’s ready for market yet. They were 2wd chassis cab trucks only and had things like 19.5 wheels and unique frames and front axles that required mounting the body a few inches higher than on regular 1500-3500 trucks, hence the weird filler panel they had at the front below the grille. The look a LOT like the Mark IV big block Chevy internally, but they did have some minor upgrades based on LS engine features like the better sealing valve covers with coils mounted on them for the coil near plug ignition setup, heads with a more efficient port design, intakes with vertical bolts, and the better flowing “header” type exhaust manifolds.

[@RandomGuyDan]

LT Tolman, built a turbo 8.1 from a junkyard motor and swapped it into a GMT800 1/2 ton 2WD. It put down over 1,000 ft lbs at the wheels and a 10.99 1/4 mile. He's building a new 572 out of an industrial block version of the 8.1. He's shooting for 1500hp on that one. I recommend his channel.

[@TomConklin]

Had one in a 2001 2500 Silverado…you’re correct these engines are a beast! Hauled a trailer with my 3 horses and never broke a sweat…

[@RMONEY2555]

Accidentally lost the water pump I see

[@concernedcitizen780]

Accidents happen…….

[@cryptocaddy7]

Proud owner of an 06 Avvie 2500!! Its truly a rare beast!!

[@electrake2063]

I had a 2003 2500 Avalanche with one of these. Best truck I’ve ever owned. I’ll never forget pulling a 31’ travel trailer cross country, with a canoe on the truck (I made a special rack to fit the Avalanche), up over the Rockies, AC on, in 100-degree heat, WHILE accelerating uphill! It was amazing!

[@brandonevans4142]

Had this engine in a 2500 suburban and absolutely loved it. I regret selling it every day.

[@JBell._]

These came in the GMC Topkick and Chevy Kodiak too!!!

[@wbnethery3]

Came to complement you on your musical prowess… Mary Had a Little Lamb on the windage tray was special!

[@rusack7174]

I've owned my '03 Chevy Silverado 2500HD (1-ton, single rear wheels) since new. I bought the 8.1 as it was offered as an alternative to the Duramax at that time. While the diesel did offer another 65 lb./ft of torque, the 8.1 offered 40 more horsepower. The Duramax was also $5000 more dear. Max tow rating on the truck was actually 300 lbs. less on the diesel because of its added weight. As was comically said at the time, it could pass everything except a gas station! All around unladen driving would net little more than 8 mpg, while cruising down the highway at 60 mph might get you 13-14 mpg on a good day. But what a workhorse! Ours has been used most of the time pulling our 5th wheel trailers, a duty it's never balked at. I do have a little leak from the rear main seal, but other than that it's just been routine maintenance. I understand that a significant percentage of these were used in marine applications.

[@trentdawg2832]

Blue devil ………thats the brand of rear seal treatment you can add to the oil…it makes the oil swell up the rubber in the seals making them effective again, you can buy a bottle of it at auto zone, kragen, napa, car quest..etc etc, just about any parts house will have it and its cost around $30/$40 depending on where you purchase it…it cost so much more than the other brands cause it works….if not they will give you back your money 100%…..u just add the bottle to your oil and drive,usually after 100 miles you should see results, if the leak is really bad you might need 2 bottles, considering its an 8.1 big block i would probably plan on 2 bottles but then again i dont know how bad your leak is…….i used it on my LSA super charged LQ9 in the nova you see in my lil picture next to my name, i was skeptical at first but then again i didnt wanna pull the motor for such a stupid simple 5 minute job…so i poured a bottle in and not even a week later i noticed my leak was gone…….so now i try all of their products first whenever i find a leak somewhere…..they have a full line of products from diffs, trans, engine, radiators and some other few that i may have forgot…….just remember pay the good money for “BLUE DEVIL”……. Do not go cheap and use a different brand, it wont work!!!……..blue devil all the way…..no im not getting paid for saying this….they just make a great product and i wanna save you time and money!!!

[@trentdawg2832]

And yes i have one of these motors in my eagle230 eliminator (boat) but the marine applications make more power and they are labeled as mercruiser mag 496 HO……..rated at 425hp

[@davidl766]

My experience, what looks like a rear main seal leak is actually just the oil pan gasket leaking.

[@CL-qb8xp]

Love this engine. I have it in my 01 chevy 2500hd. Pulls like a beast. Makes max torque around 3200 rpms.

[@harddriveusame7248]

It had to be that pine needle!

[@bigdog3929]

So fun to drive bigblock in 2024 just feels different

[@Bayuhutamamotor]

Thankyou Eric for taking the time to enlighten us once again!

[@91CavGT5]

Another vehicle that could be powered by this engine is a school bus! I worked as a school bus mechanic back in 2007 and we had a whole fleet of the 8.1L gas motors powering 70 passenger school buses.

[@91CavGT5]

I had to replace MANY oil pan gaskets and rear main seals. Oil pan gasket leaks were common, but they leaked in the back so we could not tell if it was the oil pan or rear main seal. So, since the transmission had to come off for us to check the rear main seal, we would go ahead and replace it. It would take me about 8 hours to do each one.

[@mmmark8737]

Great fun fact. Thanks for sharing.

[@upon1772]

Yeah - Pretty sure they put them in the Kodiak/Topkicks for a number of years and could see them in anything with that platform.

[@joshuaelizabethfoster6276]

It lived in box trucks topkick/Kodiak longer then anywhere else, until 2009, then it was sold to be used as marine and power generation lol. They are 1000hp capable WITH 15000$ in parts lolol.

[@volvodoc01]

I bet better than that dron-y sounding ford v10 (tbh the only issue I can think of atm with those is exhaust manifolds cracked a lot)

[@triplehelper6944]

8.1 the original duramax killer. Love that engine

[@johnelliott7375]

Perfect job as always!😊

[@65gtotrips]

That oil pan is ridiculously huge !

[@Montego6500]

Lt Tolman knows just about all there is to know about these. His made mad power.

[@coybrindley5015]

Still have mine 270 k miles and she’s still running strong.

[@markiehunter5535]

I enjoyed this vid very much Eric. Thanks a lot!

[@daylongdriver1]

Thanks for playing the (Stock) C5. surely somebody stole the cats off it? Does sound and puff out the ends of the pipes. Maybe anything that even looks like a muffler was deleted. Sounds like it might be even louder than that, like raised compression, 4 valve heads? My motorcycle engines (four valve) have that tached out sound, it makes. Be hard to get along with on a long trip. I watch as many of your shows as I can. Been wrenching 53 years but don't tear engines down as much as doing detail work and total replacements. Most customers want bullet warrantee coverage, not a patched had failed some way motor. I've had customers replace fairly low mileage (with then a failure with new motors just so they can trust it to run a long time, always new radiator and any oil coolant stuff if it has it. same with hoses and even heater cores). I guess it depends on what happened to them on other failures when they run a mixed fleet of different brands. Looks like a crank kit would make that motor good as new. I've done 318 Dodge V8 and 225 Dodge slant Six, both with mains out only and they were oil change shop, didn't refill and send, lock up just down the street from the shop that did it. traced back tot he guy that runs the shop, all done but the oil, called away to answer phone then that lead to something else someone else releases the truck just to have it fail. Both only had a gauge and no red light. driver didn't know till it stated to slow down, by then it was too late. Hot oil change even the lifters can be quiet. No notice at all they were out of oil till the last few seconds. I didn't even see any glitter in the oil, but couldn't get those motors to turn enough to even remove the torque converter bolts had to drag the converter out of the trans and then get into that when it leaked with the repaired motor. Whisper down the lane failures. One problem causes a new but related to the need to be worked on. I like your comments as you go along, like "lets see if there is any malfunction in the combustion palace" Oil filter may have looked that way as it wasn't changed, as in just the oil, or sabotaged, just drain the oil, or crash and still running the the oil lines on the oil cooler system failed in the crash. Just sit and idled till it locked. They do that kind of engine changing work just didn't even want to see it while the engine gets worked on or changed.

[@IMJustSomeGuy100]

Great video, going to be doing my own tear down this week on a 7.5 hp refrigeration compressor that had no oil pressure.

[@FordShitBoxes94]

These big blocks definitely last a long time if you take care of them

[@vetteluvnh]

Incredibly satisfying to watch. Great commentary as well. Thanks for sharing.

[@gr3en21]

"It's stock, I swear." T-Shirt worthy.

[@kayciecarryl3366]

I look forward to Saturday when I Do Cars comes out. Thanks Eric. 👧

[@SirUncleCid]

It's also the day my Runescape clan's citadel resets! What a night!

[@alecmurray8339]

My 02 Yukon XL just hit over 200k this year. And it’s still purring like a kitten.

[@TheCRTman]

They're great

[@yos9865]

I love this channel sm. The lack of swearing is inspirational haha

[@ve2zzz]

You should sell that crank as a trophy or to make a tale support !!! It is unique. All main bearings destroyed bu rod journals perfect !

[@trentonrichardson2846]

Heck yeah. Been waiting for an 8.1. I think I even said something on a previous video and here she is. I’m kinda excited

[@mlichstein1]

Mary had a Little Lamb with the pickup was so great!

[@luisakulam8131]

Good work y learn alot from you chanel.❤

[@Cyrix2k]

That c5 is certainly a factory freak

[@screwthecabal6453]

It's awesome to see you get excited about an engine like this. It reminds me of me when I get to work on something I don't normally work on.

[@marathoner43]

Another great Saturday night video Eric. Thanks man, and keep up the good work. Oh, and P.S. I totally believe you...that corvette at the end is absolutely stock! :)

[@philirwinskifortyfive1798]

Plugs were gapped with a tire iron!

[@jacobrzeszewski6527]

There are 5 things your viewers like: 1. Piston McNuggets. 2. Water pump shot put. 3. Successful disconnecting rod test. 4. Head bolts creaking. 5. Dipstick mud wrestling. We got literally none of that today. Now, we are not obligated as viewers to get anything. We appreciate what you do. But I suddenly have an urge to money shift my Focus at the end of a 20k mile oil service interval.

[@1966caprice]

I currently daily one of these in a 2500 Suburban. Nice to see a full tear down to get a better idea of what these things are like on the inside.

[@derveallcastillo1075]

Same here. I have a 2001 with 160k. Drove it to Texas and Back to Wisconsin with NO problems. I love this truck

[@dalesimpson2609]

I have a 2001 2500 HD with 255k, still running strong. Pulls my 7K travel trailer just fine.

[@mattt198654321]

For all those mentioning...it's got huge displacement and low power because that's good for longevity. Even Ford's new 7.3 godzilla engine makes 300hp/425tq in the heavy truck variant. That's how you get 500k miles out of them.

[@FrankyRedEyes]

I had a 7.3L Godzilla in an F450 430hp 475 horse torques

[@TestECull]

Ford's Godzilla engines have a habit of eating their valvetrains for breakfast before 40,000 miles though haha. They're shit. All the modern advancements in the intervening 50-odd years between the 460's introduction and the Godzilla's and all Ford managed to do was make it shittier...

[@infernoking7504]

@@TestECull so does the modern chevys with there lifters with active fuel management.

[@JansenX12]

Yes for a rule of thumb thats correct but there is more to it than that. The engine also must be installed in the right vehicle to last long. The famous VW 1.9L TDi that last 1.000.000km wouöd not last that long in a big truck.

[@debi5292]

@@TestECullVariable displacement oil pump driven by a teeny, little roller chain that will fail in time as well. . Garbage.

[@Tovvvija]

I needed that water pump... and some used timing chain guides. Man...

[@JustOurFamily]

Love it, old school iron! Well done

[@FrankyRedEyes]

I hate to say I'm sitting here waiting for this weeks video but I'm sitting here waiting for this weeks video.

[@daltonmorgan4342]

You aren’t alone brother

[@throttlewatch4614]

Matt’s off road recovery worlds largest off road wrecker runs this engine

[@davidwaterhouse4133]

Horay, your best dipstick removal yet.👍👍👍

[@bcubed72]

Lovin' the BBC content, guy ;-)

[@73ellene]

Classic : drained the oil, forgot to put more back in.

[@seymoarsalvage]

Not with the 8100's, they burn oil as much as they burn gas.

[@prime6091]

BBBC is such a wild term

[@stuartbarber7784]

Aaa the good old extended v16 cam removal 😂👍

[@ericd9744]

I think it was dry started after oil change. Filter might have been primed or wet from oil that was in the pump.

[@davidedgar2818]

I worked in a shop where a mechanic did the top and I did the bottom on a full oil change and tranny service. I did my work properly including pre filling the filter. The topside guy didn't put in the oil but did put in the tranny fluid, he started the truck to top off the tranny but never checked that the oil light went off. That engine seized up before it got out of the work bay. I wasn't fired, he was, but I learned a very valuable lesson by this, always check the oil before you turn the key. I also leave the dipstick and oil filler cap off till the oil goes back in.

[@zaucy_]

​@@davidedgar2818and THAT is exactly why I've never understood why anyone would ever think it's a good idea to have a 2-person oil change system. When i was a Chrysler tech they started doing that system for the lube techs and i remember thinking "i wonder how many engines will end up being started without oil in them" let's just say the whole 2 person oil change thing didn't last very long 😂😂

[@FadedSparkx86]

My thought exactly. As soon as he said the filter looked new... Oof.

[@chrisbrown3925]

If you have a BMW with yellow chalk on the oil cap, that was me. No dipstick means I mark the oil cap after filling...

[@runningawayvagabond5876]

Was thinking the same. Clean oil filter and 'dry' looking engine internals plus the signs of running hot would suggest it was run without oil.

[@robertrossborough7206]

Hmmm I’m betting it was the last oil change, someone left out the oil, drove off or maybe just idled it ? Couple years back a dealership did exactly that to one of my cars. Engine rapped for a minute then they shut it down. Wouldn’t crank then, seized up tight. Dealer bought car back, just 8000 miles. Thanks for your great videos, you should be a shop teacher for the next gen mechanics? 😅

[@dreamages9838]

Nice job you were well prepared and it shows. I like it!

[@gregoryweber7408]

awesome tear down again sir, i applaud your humility eric

[@crpgap9595]

What are the chances someone did an oil change and forgot to put the oil back in?

[@danielkonrad9435]

That’s what I’m thinking too

[@UNTrider2010]

I would wager it happened at a quick lube location.

[@Markomyt1]

This has my vote. Just enough oil in the galleys to wet the oil filter, but that about it. The mains were completely dry, so it didn't run long enough to trash the rod bearings.

[@crpgap9595]

Likely fired her up , started backing up and spotted the unopened oil jugs on the seat. 😬@@Markomyt1

[@christophertstone]

And then they let it idle for a while.... till it stopped. That at least sounds plausible.

[@aldosilva2714]

now i know the issue is cam from V16 engine XD

[@letitrest4662]

It looks like one of the mains spun and through the crank oil galley took debris to the rest of the mains and ruined them also. The centrifugal force will throw oil out to the rod journals. It was likely at idle and didn't take long to lock up. I'm surprised those pistons don't have a deeper skirt. That engine has a fairly long crank stroke, yet short rods, which means high piston side loading on the power stroke. A deeper piston skirt would distribute some of the side loading. A high volume oil pump sometimes on a big block can stop something like that from happening. As the engine builds miles on it the mains loosen up a little, and need the extra pumping volume of a H.V. oil pump, mainly at startup. The 8100 Vortec is an oil burner too, and if you don't stay on top of keeping the oil level up.... I've seen 400,000 on fleet maintained 8100's . We had wreckers with 8100 Vortec motors. This was in the Northeast. In the winter sometimes those engines were running for over three days steadily. We always used either straight 40 weight oil or straight 30 weight in really cold weather. In the morning let them warm up for at least 5 minutes before you start hammering on it too.

[@gregoryweber7408]

bonus footage was fantastic

[@svicesv]

The scatter pattern of metal shavings in the oil pan seemed to indicate that the pan was dry when the shavings were scattered around the pan.

[@mwb3984]

I think this is right - something was whispering in my head at the end and this observant fan pointed it out. Good job!

[@janlombard6712]

This is a very good point. I agree fully

[@Losingsince]

Try to find a Ford 460 for the next one. As always, I love these videos

[@richardcornelius1050]

I Had one of those Rare 8.1 2500 Avalanches until INDOT failed to do their job one Tragic day in 2018 . It was fully loaded and I miss that Beast .

[@charlietanner6211]

excellent

[@WhalerGA]

These 8.1L motors were great marine engines in the early-to-mid 2000s. 425hp and over 500lb-ft and definitely overbuilt for that power output.

[@Musclecar1972]

My son has 2 of them in his boat, they run great, lots of power. 👍

[@trentdawg2832]

I have one in my eagle 230 eliminator…..yeah its a blast!!!

[@trentdawg2832]

@@Musclecar19722 is always better than 1……i can only imagine how much gas his boat uses (cost)…..im guessing its an offshore racer over 25’……….mine is a 23’ just at the brink of becoming a mini cigarette!!!

[@Musclecar1972]

@@trentdawg2832 I don’t know what it would be classified as, it’s a nice boat, but yes he says it’s hard on fuel, I have never personally ridden in it, have only seen detailed pictures of it, we don’t live in the same state. He has owned a few boats, and is pretty well versed in them.

[@keithking5469]

The older big block, 454, etc. Are known for the bottom ends to knock after excessive mileage. Due to end play of the crankshaft brush washer bearing failure they will still run but they will knock a couple times when you first fire them up. Been wrenching for 40 years

[@rushthezeppelin]

We need Engine: The Musical!

[@simonblackwell4273]

so cool.

[@haroldbenton979]

Almost going to bet that this was a Jiffy Lube special oil change screw up. Aka they changed the oil and forgot to put oil back into the engine. My aunt had them do that to her 2020 Honda Crv and they bought her a new engine.

[@2nickles647]

Jiffy lube TECHNICIAN's that's what they are called. Change oil on your bubba truck and now their Technicians. With a capital T. Something about being called a TECHNICIAN just rings your bell loud and your mum and pop proud. 😅😅😅

[@harveylong5878]

@@2nickles647 either way, PepBoys still has JiffyLube beat. PB's will either snap oil drain plug off ,strip your oil drain plug, or gorilla tighten oil filter on to 400 foot pounds torque

[@Musclecar1972]

@@harveylong5878 😂 👍🤣

[@mamapapabear2679]

my guess is that it was towed in gear, no stress on connecting rods but crank was spinning like a tasmanian devil.

[@farmergeo5374]

There's a plausible alternative!

[@GlacialErratic]

I was thinking sudden loss of oil, broken oil cooler line. But this is a very likely scenario also.

[@mikelovin7]

The oil pump would have been turning if the crank was turning via timing chain and cam then to the oil pump.

[@robbypro3370]

Dry started for sure, mains rotate 360, more weight on the mains and it siezed up before the damage was done to the rods, no oil to move the shavings from the mains to the rod bearings.

[@georgevg3593]

Muchas Felicidades Joven Por Su Canal. Saludos Cordiales Desde Mazatlán, Sinaloa, México. ..

[@lllilliiiliiillilll]

HONEY WAKE UP! I DO CARS DOES A CARS!

[@wyblackwolf]

I'm gonna guess that it was ran with very low oil too, really lucky the block didn't get a new window or two installed. It does happen where the main bearings spin before the rods, but it's really not very often. All in all there's quite a few good parts from this one which is a nice bonus. I've always wanted an 8.1, my uncle had a Yukon XXL with one and he loved everything about it, except the fuel mileage.

[@op_s_lead]

Its cool learning on here 😎💯

[@randyholly2594]

Just subscribed and a first time viewer. Like the way you do things.

[@jamothegreat6052]

I wanted that water pump! 😂 I could have made a flying drone with it.

[@smoothlover073]

This looks like they may have started it with no to little oil during an oil change or a bad oil pump

[@dennisstuhr9201]

Another great video thank you.

[@marciainnocent6321]

I am a new subscriber and love watching all your videos. Keep up the good work!

[@Driver0378]

I worked at a Chevy dealership in the early 2000’s, and they were selling an Avalanche with the 8100 with a Borla exhaust on it. It sounded sweeeeeet. I also got to drive it. For a vehicle of that size, I was very impressed with the power. 😉

[@trentdawg2832]

Yeah the 2500 avalanches did have those in them as well, talk about a unique vehicle

[@kevincurry4735]

Good evening Eric. Big block engine. I wander what malice are we in store for tonight. Well the fan blade took a pounding by a forklift. What kind of fungus is among us😂🤣. Eric’s rhymes are so divine.

[@JustOurFamily]

That "bad" spray can - pull the nozzle off, refill it with compressed air though a blow gun. Works great.

[@Kyle899]

My dad and his friend both had 2002 2500 Avalanches. His friend then bought a 2004 2500 and put a whipple supercharger in it. Later my uncle bought the 04 and did a Duramax swap.

[@jameswhite3348]

I think that truck went for an oil change and someone forgot to put oil in. See if the oil filter is dry.

[@seymoarsalvage]

Did you not watch the vid....?

[@reecedrury4145]

Not surprised they last forever at 40hp/ltr

[@y5mgisi]

Man I love 8.1s.

[@kerrygleeson4409]

Great channel always very interesting 🦘

[@briankrian3834]

My guess is that someone drained the oil and then left for the day. Next morning someone moved the vehicle because they didn’t know the oil was drained. All the damage was done at idle, which is why the rod bearings didn’t show the same damage.

[@isaiahalbert3231]

The school district I work for has 8 of these engines converted to propane in a bluebird bus. We have to do weekly oil checks and they burn over a quart every 1000 miles. Not one of them has made it to 150k without needing rebuilt. The higher egt on a propane really kills them but they do sound amazing and are pretty fast for a school bus

[@dragonbutt]

Oh no the propane converted ones. They eat all of the things in those engines.

[@subarutime5089]

This looks like so much fun😅

[@kevinjones893]

Dude, i been watching you since the beginning of this year had no idea you were local I live in Florrisant.

[@PatrickEvans07]

Some possible things that would cause the mains to fail without damaging rod bearings. Bending of the crankshaft. From lugging or high rpm. Another reason might be block warping. From fast heat or large heat cycles. Either could be checked by a machine shop. Oil starvation looks likely but rod bearings look really good.

[@richardcornelius1050]

This’ll happen with a pre-filled oil filter and a dry sump ….

[@ryanconway6915]

I have this engine in my Yukon 2500 and love it. Just under 200k miles and it pulls a 26 foot enclosed race trailer down the highway at 75 in overdrive all day. Just burns a little oil. Worth noting, factory spark plug gap spec was .080. Crazy big.

[@patrickmorrissey2271]

Yes. Thank you, I was gonna say this.... When you're looking at .032 Miata plugs all day, .080 looks pretty big.... Not that those plugs weren't smoked... They were... but they weren't WILDLY off from the .080....

[@trentdawg2832]

Yeah over 100k mi and they start to burn oil regularly….by boss had to keep 2qt’s of oil behind the seat for weekly oil top offs!!!!

[@mikekeohane414]

Switch to Amsoil 10w 30 signature series

[@coreyerwin2536]

I have two 8.1 engines! So far really good!!!

[@logansavestheworldreacting3778]

So, there was only one cylinder with water in it and it was located at the front of the engine. When an engine goes swimming it bends and breaks rods and it is almost always at the rear of the engine, unless the vehicle became completely submerged leaving the heavy front end sinking first. I believe you will find that the head or the cylinder wall is cracked, and it was pushing water into the intake runner or directly into the cylinder. This is what destroyed the mains. Many would try to argue that if water destroyed the mains why are the rod so clean. Water does not have the same compressive ability nor as thick a viscosity as engine oil and oil must first pass through the mains to get to the rods, however once the water/oil gets to the mains, the water quickly exits the bearing, and the oil continues to flow to the rods keeping the rods semi lubricated and the mains left unprotected.

[@daytrypper]

Loved the "park a Miata in that gap" crack. Just out of curiosity, how much does that all iron lump weigh? I'm guessing somewhere north of 700 pounds? Woof!

[@angle_1685]

Around 750 lbs from what I've read

[@trentdawg2832]

Crazy that its 6 liter LS counter part literally wieghs half that😂😂😂