What Is A Spun Bearing? What Is A Spun Rod, Main, or Cam Bearing? What Causes A Spun Bearing?

What is a spun bearing? In this video you will learn what a spun bearing is, why a bearing spins, what can cause a bearing to spin, what are the symptoms, and how do you fix it.
@AdeptApe on Venmo or [e-mail] on PayPal for donations, thank you so much for supporting the channel!

[@josevillegas9029]

Seeing a spin bearing as a mechanic is like hitting jackpot, but as an owner operator I imagine it must suck, great vids josh

[@markiefufu]

I'm loving all these informational teaching videos! Just got through watching a video where a guy was telling people to put oil on the backside before installing, claiming the oil would squeeze out. I thought it sounded like bad advice. I rebuilt my first engine back in 1985 when I was 19 (a 455 Super Duty big block in a 78 Trans Am). I learned then to not lube the back side. Glad you confirmed this and explained the reasoning.

[@biohazard7276]

It's refreshing to hear someone actually call it an engine and not motor!

[@dannyyo7948]

motor is the term used for electric motors. and engine for internal combustion engines.

[@TheEdudo]

in usa manily is engine, in UK is an old fashioning to call it motor, they are sinonims

[@chaytonruijsenaars3971]

technically anything that creates motion is a motor, its in the name, no matter what it uses as fuel, electricity, compressed air, diesel, gasoline, calling it a motor is as "politically correct" as calling it an engine and you can really only use the word engine carefully, cant call an electric motor an engine cause you would look like a dumbass. . .nobody has even been looked at funny for saying motor, at work we call everything a motor cause no matter what it runs on it does the same thing: spin

[@jaydunbar7538]

A motor is a machine that converts other forms of energy into mechanical energy and so imparts motion. An engine is a motor that converts thermal energy to mechanical work. wordnetweb.princeton.edu In other words, an engine is a motor, but a motor is not necessarily an engine.

[@TheEdudo]

excellent, so they are in genus-species relationship

[@davidirwin5069]

Your knowledge on these fantastic cat engines is way beyond your age your the only mechanic I would take the time to listen to flawless

[@commentator2.0]

Thank you Post Malone!

[@dotglowkid722]

aarunt1 😂😂 he do looks like post Malone

[@riversedgevapor9284]

You qlqwe we ae

[@jlou606]

😂😂😂

[@brody.nickel]

Second cousin to both Malone and Donut Operator, lotta fame in that blood!

[@erickzimmat4601]

extremely helpful. Spun a crank bearing on a 3126b last week after coming out of reputable shop and running for only 183 miles with 90k on motor and good maintenance. Coincidence, destiny i don't know but this helped me understand what i'm dealing with. Thanks

[@imagine_restoration]

This is highly informative! Thank you for spending the time!

[@Cusers]

I am French from Canada and with you I learned a lot of things in mechanics thanks to you I really understand better thank you

[@MANwPLAN101]

Legit. Your videos are worth more than Gold. Easy to listen to. Abundance of info. For really

[@rybye83]

Very cool!! You could not have explained that any better. Thanks for the info

[@lernwithgern]

Great music. Your videos always make me want to do an oil change.

[@DyingWillofTheUchiha]

Very informative, thanks for the explanation.

[@1Patient]

Thanks for sharing your video. Always appreciate Knowledge Based Video with visual examples. Would like to see the other damaged components, i.e., Piston Rods, Thrust Bearings, Damaged Bent Valves, Broken Blocks, Cams, etc..

[@coffeemonstar2]

The best explanation I heard. Currently dealing with main bearing damages to the crank, it’s painful. Thanks

[@nigelclark7360]

Excellent very well explained Good video Normally when the main bearings get worn you hear a rumble when engine is ticking over and the noise increases as the engine is speeded up this is with no load on engine, it is even worse when underload

[@MrSpot41]

I'm wiser having listened to your great explanation, thanks for posting.

[@JoshKilen]

very nice job, and thanks for explaining what happens.

[@TheArozconpollo]

Great video, like your presentation on this and others. Thanks!

[@ahmedkamla2109]

Thanks for the good explanation! Very detailed & informative.

[@Orangelemonblue]

Awesome vid...thanks for the time to share

[@chrisdixon3195]

What an informative video! Thank you! (And, sadly, not only did I spin that main bearing, but it was pretty much confetti when the mechanic opened things up.)

[@flying__fox4749]

Thanks for the well detailed video!

[@U2011iphone]

Great video as usual. Thanks!

[@antisocialist9272]

Excellent presentation thank you very much

[@nwinawe]

Great informative video. Thanks!

[@MrUkielover]

My BMW X5M with 49,000 miles unfortunately had a rod bearing spun. The oil was changed religiously every 5,000 miles & I drove like a gentleman. Dealer wants $36,000 for a new engine & will not offer any assistance. Decided to have it rebuilt at a fraction of what the “stealer-ship” wants. The rebuilder, who used to work for BMW, said that they designed the bearings to be too tight & this is a common issue with low mile BMW’s

[@jayturner7712]

Wow, and bmw is a strong brand, but I guess not like old quality anymore...

[@kingjames8283]

Luckily no losses in this dept. In March '16, I had engine inframed due to failed rings. Then in July '16, I had rod and main bearings replaced. Having well in excess of one-million miles, I hadn't noticed just how low the oil pressure had become. After the bearings replacement, oil pressure jumped from 40-psi to 62-psi. In 2017, I had the bull-gear and other gears on front of engine replaced. This year 2018, I'm going to have six-pack injector replacement and see if it's possible to get a new high performance camshaft installed. I've spent a lot of money to ensure my engine lasts for another million or two miles because I like this particular engine and the truck it's installed in and I want to get all the life out of them as I can without the detrimental issues described in this video. I'm very pro-active when it comes to maintenance including oil changes at every 15,000-miles religiously.

[@Nes924]

4 years late, but thats fucked. 15000 miles for oil changes? Americans are absolutely clueless when it comes to maintenance lol 24000kms for an oil change? yikes. 10k kms at most for a change.

[@kingjames8283]

@@Nes924 - 15,000 miles for a 15-litre diesel. Only 5,000 miles for a gasoline car engine on synthetic oil. Most trucking companies today operate on a 20,000-30,000 mile oil change interval. Not to blow your mind but with oil centrifuges, heavy duty diesels can go 100,000 miles between oil changes. The centrifuges remove fine metal particles and soot which keeps oil cleaner longer. Semi-trucks can attain 100,000 miles every 10-12 months. With today's high tech fuel injectors running at 35,000 psi pressure, fuel is better atomized in the cylinder producing less exhaust gases and soot getting passed the piston rings which keeps engine oil cleaner than in older diesels. The huge reduction of sulfur in today's diesel fuel refinement also lends to cleaner engines.

[@Nes924]

@@kingjames8283 oh diesel! I thought you were originally talking about gasoline engines! Hahah my bad man! I almost had a heart attack. (Australian) so seeing over 20,000 kms for oil change I was like BROOOO ;( hahah. But I’ll take your word for semis, I have no experience with bigger diesels :)

[@Born_Stellar]

this was very informative, thank you.

[@MrDannyt81]

Great video! Shocked I didn’t hear him mention oil starvation. You can do normal maintenance and change oil regularly every 3k miles but still spin a bearing. In my case at 148k miles my engine was burning oil worse than I knew. Didn’t leak oil at all. Saw oil pressure light come on, checked oil and no oil registering on the stick. Ticking started soon after and then a few months later came the rod knock. Pulled engine and confirmed spun rod bearing on cylinder #1. Most engines will start burning some oil after 100k. I suggest you regularly check your oil level even if you know your oil should be good for another 2k miles.

[@amelh]

Same with my Sonata, burned 5 quartz of oil in less than 2 months and then knocking came

[@Numb630]

@@amelhme today

[@markiefufu]

I spun a bearing on a road trip almost 40 years ago and shot a piston out of the oil pan. Luckily my block didn't have damage. Ever since, I check oil once a week and when on road trips in the RV, I'm checking it daily.

[@kerrygleeson4409]

Great work as always

[@AdeptApe]

+Kerry Gleeson Thank you.

[@garyclarkii9801]

Good info Ape, I'll have to keep that in mind and thank you for the video also sir!!!

[@AdeptApe]

+Gary ClarkII Knowledge is power, feel the power!

[@kristoffMR]

Excellent explanation Sir ..

[@jjjthomasson8902]

Great video as always. If I were to get bad news you’d be the Diesel Dr. I’d want to give it to me. However, now I’m scared to start my truck in the morning lol

[@joepolen7212]

Hi! Your channel has inspired me to think about truck fuel mileage. I am a retired Physics teacher so I tried to look at some of the factors that affect truck fuel mileage. If this does not seem real or of value to you, just ignore it, I had fun anyway. I researched the internet and found truck rolling resistance is 6 lbs per 1000 lbs of gross weight, diesel fuel contains 155 million joules of energy per gallon, a semi truck frontal area is 8.5 feet by 13.5 feet or 114.8 square feet or 10.6 square meters, the density of air is 1.2041 kg/cubic meter, the efficiency of a turbocharged diesel truck engine can be as high as 45%, drive line efficiency is 92% , air drag coefficient is 0.96. Lets assume our gross weight is 70,000 lbs so our rolling resistance is 6 x 70 or 420 lbs. Air resistance is given by the formula ½ times drag coefficient times air density times frontal area and times relative wind speed squared. Lets assume there is no wind relative to the earth so the truck speed becomes the relative wind speed. Let our truck move at 58mph or 26 meters per second, our air drag becomes 1/2x.96x1.204x10.6x26 squared for 4141 Newtons or 931 lbs. Adding 420 lbs to 931 lbs gives us 1351 lbs. The work done by this force per mile is the force times distance or 1351 lbs times 5280 feet or 7.13 million ft lbs per mile or 9.67million joules per mile. Fuel mileage would then be 0.45 times 155 million joules / gallon divided by 9.67 millionJoules per mile or 7.21 miles per gallon. If our truck climbs a 4 percent grade at 40 miles per hour the rolling resistance is still 420 pounds, the air resistance drops to 441 pounds for a sum of 861 pounds. The work to do this per mile is 861 lbs times 5280 ft for 4.55 million lbs foot of work or 6.16 million joules. Our truck now needs to lift its weight 4 feet for every 100 feet it travels so the lifting energy is 40,000 lbs times 4/100 times 5280 ft/mile or 8.45 million lbs foot per mile or 11.45 million joules per mile. Adding gives us 17.6 million joules per mile. 0.45*155 million J per gallon divided by 17.6 million J per mile gives us 3.96 miles per gallon. I know there are a lot of factors but are the fuel mileage numbers close?

[@AdeptApe]

+joe polen I would say you did a pretty good job there, as far as the numbers being close, they seem a little high for a truck with a 70,000 pound load. Most guys with Cat engines seem to get 4.5-6 mpg. Of course these are a little bit older engines in usually not the most aerodynamic trucks. I wish I would have taken a physics course in college now. It is practical engineering/science. There are guys that get double digit mileages out there called hypermilers. Not sure if you have heard of them, but by mostly becoming more aerodynamic and driving slower, they can see some real mileage gains. Not sure what other tricks they do. I liked your comment a lot though, would you mind if I used it as part of a video?

[@joepolen7212]

Hi Thanks for the reply. Yes you can use this in your video. I thought it was interesting to look into some of the main physical factors about fuel mileage in large trucks.

[@keiouskei]

I'm impressed, I haven't thought about computational physics in a long time, and you got me there at 4am when I was doing research on how to fix my significant other's car lol. The only thing I could possibly add would be your missing out on wear on the engine by assuming the engine efficiency. If your pulling data for that online, those numbers are also probably for "lab like conditions" of the engine. Also it would be important that your numbers only represent the M/G at those specific times, and isn't an average over a period of time, which would be a little more accurate. Although even any average would be subject to the route taken, the user's driving habits, blah blah blah. I think for a lot of your average joes out there it can be easy to forget to think about where you numbers, and data come from, and how that could affect things.

[@keiouskei]

But thank you +joe polen, I enjoyed the distraction, and appreciate anyone that has an interest and understanding of physics. From a former physics student at WKU, unfortunately I had to stop short of my bachelors, but I still love the field, and am resolute to finish that degree someday.

[@ioccatonyz1]

When everything is working as well as expected, what effects mileage on any vehicle is the resistance of air. At speeds under 48 mph the air resistance is fairly light and is a small factor. However the amount of energy for maintaining each mph above 48 mph goes up progressively. Back in the 1970's the speed limit was reduced to 55 mph for fuel conservation. So if you are in a situation where time is not the issue but range is 45/48 mph will give you the most range from a tank of fuel. You can expect about 10 more miles per gallon if you slow down to 45/48 mph from 70 mph in a passenger car. Slowing down to 55 mph from 70 will be about half that at around 5 more mpg. Just something to conciser when pressing on to the next exit for a fuel stop. My low fuel warning comes on when down to 2 gallons. Slowing down to 45/48 from 70 will get me 20 more miles to the next fuel stop or slowing to 55 will get me 10 more miles. Slowing down to say 40 or even slower will not get you any more significant range. By Law the lowest MINIMUM speed on the interstate system is 45 mph the state of Florida is 50 mph. The safety risks are high traveling on the interstate at 45 mph and should be considered. It is very significant to gain 160 more miles from one 16 gallon tank of fuel, at the cost of reducing speed by 25 mph. Increasing range from approximately 432 to 592 miles, 37% increase in range at a cost of 35.7% increase in time. The time used is 6 hour 10 min when travel speed is 70 mph to empty at 432 miles. Traveling at 48 mph to the same distance of 432 miles is 9 hours even with 4.3 gallons still in the tank (that is a 1/4+ tank) costing 2 hours 50 min. Going the maximum distance of 592 miles at 48 mph would take 12 hours 20 min, or 8 hours 27 min plus the fuel stop at 70 mph. Just from reducing speed from 70 mph you could increase your fuel economy by 37% at 45/48 mph, 30% at 50 mph, 25% at 55 mph, 19% at 60 mph, and 11% at 65 mph. These calculations are what I have achieved with my 2007 Mustang GT 4.6L approximately 27 mpg at 70 mph and 37 mpg at 45 mph. The Mustang is fairly aerodynamic and it still suffers from wind resistance. I have not driven a big rig loaded to 70,000 pounds to know if they could get better or worst than 37% increase in range by reducing speed. As a safety consideration the heavy loaded trailers will decrease the hazard of jack-knifing when traveling slower. The transportation company "Swift" has speed limiters governing their speed to save money on fuel and reduce accidents. Effective November 27th, 2017, Swift company trucks went from 60 mph on the pedal and 62 mph on cruise, to 63 on the pedal and 65 on cruise. Time is money, so even Swift has nudged it up a tad but still saving 10% or more that the other companies that run at 70 mph or faster.

[@saravanamg7593]

Very nice informative and cool explaination,.

[@dmass7578]

Very well explained. Good video. Thumbs up.

[@alwayspackin1]

Thanks. nice video. Very informative

[@alibilal8668]

Great video . Thank you

[@frankycomeau]

Excellent as always !

[@AdeptApe]

+frankycomeau Thank you.

[@Brad-lt6mr]

I worked as a Toyota tech in the 90s. The 1-HDT engine had an issue with rod bearings but would usually give no warning before throwing the rod out of the block.

[@jacknickolstine3355]

🤣😂🤣

[@ArthurSperotto]

EXTREMELY well explained!! Well done!!

[@emo65170.]

Great info.

[@johneric3886]

Excellent video, I like how you talked slow pace more explaining things.

[@ZylonFPV]

This was a really informative video, I learnt a lot :) Thanks for the effort!

[@antoniocaballero4207]

Well done, thanks!

[@zakiuddin3839]

very nice explanation

[@EricWayneThomasMusic]

Great tutorial. Thanks.

[@markarmstrong3394]

Awesome video as usual. I look forward to your videos

[@AdeptApe]

+Mark Armstrong Thank you.

[@yaumusa6280]

Thanks for video

[@xdygmnyrdf]

8:55 I really think that the bearing journal is the surface on the crankshaft (or camshaft) which the bearing rides against. Bearing housing is something that holds the bearing in place.

[@o.sanchez5617]

Hey Josh, wanted to stop by and thank you for your time yesterday. It was great meeting you and I enjoyed the interview. I hope I get a chance to work with you, thanks Oscar.

[@AdeptApe]

+O. Sanchez Hi Oscar, it was a pleasure meeting you and being in on the interview. I think you did well and were very honest. It is up to the Polo shirt wearers now. Hopefully we will know soon.

[@o.sanchez5617]

Adept Ape I hear ya, now it's just up to them

[@RandallChase1]

I had a spin bearing in my 1973 MGB. NO FUN! It was actually less expensive and less difficult to buy a new engine or in my case a restored engine.

[@offroadastroothervans.4685]

Very well explained"!! My engine just started the dreaded rod knock ! 4.3 liter v6 astro van and im just gonna try to replace the rod bearings since it just started ! Hopefully i caught it befor it damaged anything else

[@jordanbelknap61]

im trying to do a 4.3 v6 vortex in a s10, any tips?

[@deerhunter8533]

@@jordanbelknap61 do what to it?

[@jordanbelknap61]

@@deerhunter8533 im trying to do a full rebuild but any kind of advice would be great

[@Eglehalo4]

Great Video man!

[@petroczinationalrailservic10]

Thank you for sharing!

[@betterbuilt1114]

Thank you for making this video!!

[@AdeptApe]

Thanks for watching it.

[@Asamccp]

Great video. I was wonder if you could do video about the crankshaft in the 3408 with respect to the off-set rod journals? Or any other CAT engine that uses the same design. What is the purpose of off-set rod journals? Are the rods different lengths from one bank to the other? Are the deck heights different? Thanks!

[@ihabphelobos7455]

Good lessons 👍 thanks

[@MrRaingods]

Good video. Thx.

[@malcolmyoung7866]

Okay, it's a Saturday night, Summer season, loads of women down Puerto Banus (I live in Marbella/Southern Spain) and I have just watched Adept Ape's channel on 'Spun Bearings'.... 'Hell YEAH!!!'

[@AdeptApe]

+Malcolm Young You are a real man. Who needs fun when you have Diesel Engines.

[@zibbyi7200]

Another cause could be slacked nuts on connecting rod big end bearing (too low pressure on press or too low fastening torque) , lack of split pins or reusing old ones during overhaul. Sometimes it can score cylinder liners and pistons as well or just damage the rings. Not sure about valve collision - probably in extreme situations. In the end you'll need to do major overhaul on the engine - dismantle, clean, measure, replace parts.

[@darbydreher9537]

thanks for the education ! I believe my 94 corvette LT 1 spun a rod bearing. sounds like nuts and bolts in a tin can. I'm devastated!! ALWAYS on point with regular maintenance. 58K miles. oil pressure remained normal at idle and driving. just started making noise after engine warmed up.

[@johnfranklin5277]

Oh man, thats unfortunate. I feel your pain. These are really quite reliable engines, if not screwed around with. I have a 94 Trans Am with the LT1 engine, I bought new . It has 338.000 miles on it now. Engine never been touched, even the timing chain is original. I've done 3000 mile oil changes since new, just used regular Castrol GTX in it. I cant understand what could cause your issues at such low mileage. Good luck.

[@inoahmann7542]

I know someone that had the same issue. They caught it fast and replaced the bearing. It ran for another 20k until some idiot rear ended the car at a stop light. (Both cars were completely totaled)

[@vettepurist304]

Great video thanks

[@followyourbliss101]

very educational!

[@Me-zo8yc]

Really interesting thanks!

[@peacepoet1947]

Thank you.

[@peterstone172]

Good explanation, helpful.. I like also that you are an animal lover.. I have two pet dairy goats which are my world away from work.

[@surfgod509]

Very direct and not suger coated! Alas like the Funeral March music when you're describing this gloomy stuff.....

[@soyeldiego4878]

My son's engine is making a horrible mechanical sounds. Per your video, looks like it might have a bad bearings or worse "( Will be removing the eingine for a thorough inspection...Thanks for the very informative video...

[@TheColbles2009]

Hi! I was wondering if you could ever do a video discussing what rpm’s to shift and cruise different cat engines at. I know they are different than their competitors.

[@JuanRodriguez-yl9oq]

Great info! Is it recommended to replace bearings at a certain mileage?

[@85net]

Good information

[@cuttingedgecool7235]

Educational talk.

[@johnkomosa4089]

Thank you for your service. Your in my brother Eddie's World , runn'n with the Big Rigs.! Why are Cats Cam Bearings less likely to fail.? Thank you, and Keep Truck'n. Rod Cap! Too much terminology ah ha. Good Job. Or some may say 'Rod end cap'. Keep up the Good work, and nice Doggie. :-)

[@machineheadslump]

Thank you sir

[@MrBond-km7dq]

Could you help explain what might cause my truck to overheat? It's an old 90s truck and doesn't have lots of engine gauges. My analysis of the issue right now is that it only overheats when the turbo boost kicks in. It's a diesel truck. The turbo doesn't have a wastegate. It's an older turbo unit without any fancy relief gates. I've changed the intercooler but that didn't help. Going uphill the exhaust glows red and temperature gauge rises instantly. It has no issues driving on the level. If you can give pointers please,,, thanks in advance

[@jimmesc]

We had a 3000 hr engine pick up a rod knock. We heard it right away. We fixed it right away. It ran for thousands of hours after that. We ran into the guy we sold it to, it ran a long time for him as well. We really don't know what caused it, we feel it was well maintained.

[@captintemplar3705]

I have a 2000 Honda Civic, it had a knock at startup but went away for while but you could hear it as I was driving (I'm to blame because drove it with low oil). I got it sent to a shop and had the crank plastic gauged and replaced the bearings. However, I could still hear a knock (I don't know why I didn't take it back), then a couple days later it ends up knocking again and I struggled getting home barely getting to 20mph. I took it to the shop, they said I need a new crank, later on then said a new engine. Now I have a block, crank, head, and oil pan all for $150 planning to rebuild it but don't know if I really want to anymore.

[@vendetta1306]

Thanks again

[@emilianogonzalez8170]

Hello brother hope everything its going well for you was cery helpfull, do you have any good advice for me im trying to rebuild my 4.7 HO v8jeep grand cherokee,i decided to check the rod knock taking down oil pan and check all the rod bearings only one was very bad almost welded to the connecting rod piston,that same got really bad and need a new one.

[@andrewthompsonuk1]

This was very interesting. I am interested on your thoughts on the high failure rate of modern light duty small capacity high output engines like we have in almost all our new cars?

[@electric7487]

Might have to do with trying to make a 4 cylinder do the work of a 6 cylinder.

[@bighampton1017]

Thank you!!!!

[@rbmwiv]

What’s your opinion on rolling in crank bearings so you don’t have to pull the crank.

[@Montoya1991]

Hey man, what mile intervals do you recomend on a oil change on a 12.7 detroit 60 series engine?

[@matthewlengyel764]

I have a tech question. Can a spun connecting rod bearing also cause a miss fire do to less travel is the rod and piston reducing compression ratio

[@selbalta873]

Hi buddy Great video, are main bearings re usable?

[@johanluukkonen7480]

How bad thing is to have timing belt failure and piston to valve contact. My car started to knock on cold starts after that, maybe 20-30 sec after start up and then it goes away. When warm there are not any extra sounds, should I get worried now or tomorrow?

[@trumpisaconfirmedcuck5840]

What is your opinion in what causes a spun bearing during a camshaft swap? Dirt during the install? Higher revs?

[@fun2drive107]

There are a few other causes of bearing issues namely the failure of the part itself due to a manufacturing defect and also incorrect assembly. Those will fail most likely in short order and not like those million mile engines that are still running strong.

[@stlglassproject]

How can you tell if the crank is damaged while still in the engine just by if it has play or is there another way to know without having to put everything back together and find out after the fact that the crank was damaged also?

[@zokusharuuku1091]

Of as soon as you said hit the valve my heart dropped. I knew I would need a new short block but I seriously would be sad if my new heads were destroyed

[@timjeffries7061]

How do you diagnose a spun bearing in a 454? I have a 1973 FRONT WHEEL DRIVE (Think Toronado) GMC Motorhome. It looks daunting to remove the oil pan --which needs to happen to check my rod bearings and change them. How is it done?

[@AnthonyGman]

What’s it cost out the door to swap up main bearings ?

[@vieczurable]

Thanks

[@AnthonyGman]

When do you recommend doing the rods and mains in a engine? Also when should I do my overhead. My engine was rebuilt in late 2015

[@DIAMONDISKEY]

Look in maintenance specs for said engine it will say when

[@chrisperez2211]

What is good service intervals for a 1million+ mile engine ? Great video !

[@jeffreyweston900]

I have 1.3 million on a Cummins isx...changing oil every 25000 miles

[@pjotrdegraaf677]

after i replaced one baring i still heard a little nock while decelerating is this bad and what is the breaking in period for the baring?

[@lesrock6065]

Can a hard downshift cause a spun bearing? Oil changes were done regularly

[@mbbnoother1536]

Nice explanation , I have a question, when you said it may caused by a wrong timing for combustion, where it will affect on, is it on the Journal of crankshaft or on the Journal of the connecting rod Journal ?

[@electric7487]

Rod journals

[@PlymouthBarracudaV8Hemi]

Can I install the standard size bearing towel if the sound comes from the down side of the engine only ?

[@thunderstrike3249]

Hi I have an issue with a C32 engine with half of the main and big end bearings that have spun and seized and the other half like new,the engine only ran 5000 hrs after a rebuild before it threw a conrod this failure occurred shortly after it was serviced, it is fitted to a D11T Dozer any views on this would appreciate inputs PLEASE.