Started Good And Ended BAD - 512ci Big Block Mopar

[@GnarlySpeedShop]

I feel like I didn't explain myself well enough in the intro. We 100% could have gotten the other carbs to idle but both had cracked fuel bowls and we discovered the 2nd carb had a blocked idle passage after tearing it apart.

[@smilsmff]

I think fully disassemble and inspection is the new norm. no longer are the days of just bolt it on and go

[@stude1953]

BEAUTIFUL paint job on that Firebird!!! AWESOME!!

[@elijah2078]

That big block Mopar sounds STOUT!!!!

[@justinhromek73]

It’s little speed bumps like this that make a reliable piece in the end. Sucks for now but it will be worth it in the end. Hang in there guys

[@darryl3767]

I’ve heard a lot of those mopars leak from the rear seal. Watch nicks garage. He change the rear seal 8 times before he got it to seal up

[@Warrior_Resisting_Colonialism]

Which seal ended up fixing that 383 in the end? I missed it. Did the rope seal do the trick?

[@darryl3767]

Rope seal!

[@Warrior_Resisting_Colonialism]

@@darryl3767 Cool! I saw the video where he had a few options and that was one of them. I never seen one before but it seemed like a rope being compressed would eat up whatever uneven problem there might be, better than anything else. I just wonder how they hold over time? I wonder if they seep, being that they're rope? I should go watch it, maybe he explains how they work and if they last.

[@russabrams3982]

Great project, while you have the oil pan off, consider adding a windage tray . Keep up the good work!

[@TheSaxon25]

Sounds wicked!! Bummer about that seal. I hate rear main leaks but at least the engine is not in the car!! Let's gooooooo 🍻🤙

[@jamesadams4304]

Try the fel pro high pressure rear main seal and for reference watch "nicks garage " he has so many videos on big block rear main seal installation. I have about the exact same build as your 440 ( different cam) . Yours sounds like it's going to be fun on the streets!

[@phillipcortel6330]

That is a nice piece! Wow!! Thank you FST!

[@terryeustice5399]

So sorry about the rear Main going out. Another tear down. Thanks for sharing! 💯👍👊

[@PalmerGulch]

Hey you two, I'd look at it this way: 1% of that big block failed, 99% of that big block is a success...I'd say that makes it a pretty dang-good build!!!

[@darwinfoster7420]

Put the factory set up back in engine. Out of the 100 plus 440 I have built only had one leak ever.

[@williamperry9006]

That 512 engine sounds good.

[@jessicagreene1773]

Check out Nick's Garage on KZbin. He had a big block Mopar that came in with a bad rear main leak. He went through several seals until he found the style that worked.

[@eddiejeselink2996]

Yo, better now than later. It happens to everyone. Sounds knarly......love it. And I'm a Ford FE guy.

[@williamperry9006]

The Pontiac motor looks beautiful.

[@ws678ta]

Ponch 400, I put that same engine in my '78 Special Edition T/A. Besides my '69 RR, that T/A is the best car I ever owned. We all make mistakes, you will get the leak fixed. 512 sounds bad-ass btw.

[@romeoalphafoxtrot9517]

Sorry about that guys. It happens. Everyone has visions of a perfect build with a flawless startup, like so many videos on the internet. The reality is, they don't all go that way, for whatever reason. It's just part of the deal. Everyone has been through it. You'll get it right, though. That's what the engine run stand is for. I can't tell you how many times my friends and I have put an engine in a car, and had to pull it because of some oil leak, coolant leak, or some bullshit. I wish I had an engine run stand back then. Looking forward to the next one! Holy crap does that engine sound good, though! WOW! Me likey!

[@aftertheendtimes]

The engine looks mean! =)

[@jasonfalk7696]

Damn, that Mope sounds awesome! I've had several 60's and 70's Mopar engines, and none of them leaked until i touched it. 😅

[@1973406]

Ole 512 sounds really good!! Definitely agree that you guys need a dedicated exhaust for the run stand to hear the engine better.

[@angelsanchez3074]

Engine sounded great

[@WestsideCritters]

Make sure when u fire up the pontiac 400 to immediately go to 2,500 rpm for 20 minutes to break in that cam , it’s critical!!!!!

[@michaelowens944]

The engine sounds awesome

[@ThomasELeClair]

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,gotta be an easy 600 + foot pounds of tree stump yankin TORQUE.....................................................................................................................

[@markkuahlamaa770]

Thanks This The Great Video & Channel & Car Cruising / Event ! Hello From Finland ! Have a Car Channel too ! All The Best & Respect & Content & Passion & Love 2024 !

[@terrygolder2959]

Easy fix dont beat yourself up you did it right with the stand sounds great

[@williamperry9006]

I've been a subscriber for a while and love the content.

[@DesignDogG]

Darn it man! Sounded too cool. That engine stand has pretty much paid for itself. Now Chin Up! Not the end of the world. You guys will get it straightened out.

[@FredHoppe-jd8lj]

Yes brother man like he said, you guys will figure it out. Just get back on that horse every time it bucks you off

[@FredHoppe-jd8lj]

That's what my mama said Karma and that horse bucked me off 5 times in a row one year

[@55gaser26]

Dulcich has some good info on RB rear mains , I always use permatex brush on aviation sealer on the back side of seal on bock side and cap side, so does Steve .

[@High_Perfomance_auto_repair]

That engine sounds solid. That car is going to be wicked!

[@SilkyShines]

Nice build keep up the good videos

[@maximuswedgie5149]

Great video, at least you guys didn’t install it and then find out about the leak, remember the glass is half full. Always.

[@marshallbravestar1972]

I love that motorsound😊

[@jacquelineg3987]

Danny!! You are the best! Supporting that Pontiac Appreciate seeing the journey

[@Warrior_Resisting_Colonialism]

That firebird is awesome.

[@mikeanderson9922]

That really sucks with the oil leak but it sounds really good

[@ARKANSASHUBCAP]

WOW - BOY HOWDY DOES THAT THANG SOUND GOOD ! Sorry to hear about the oil leak but that stuff happens and you'll figure it out thanks for the video and again congratulations !

[@user-ns4vg9vd3w]

That thing sounds good!

[@marshallbravestar1972]

Woooowww!!! I can’t wait to see you drive

[@williamperry9006]

I love pontiacs.

[@wesleypulkka7447]

GSS, boy was it a great idea to engine-stand test that big block! I had almost completely installed a "Rebuilt" engine when it started to leak oil! It was a cracked block from a pro-shop! They came through with another block at no charge to transfer all the good bits and it may still be running. (Sold the Car a year later) All the best you guys!

[@OneManGarage]

The 66-70 Pontiac in light metallic blue and factory chrome is the most beautiful engine ever ! Glad the Mopar is just a leak !

[@paulhardman2515]

So sorry about the leak! I hope it's not a total disassembly. Sounds amazing though!

[@Joshuamd131]

You guys are doing great. There are always obstacles in engine building but as long as you have faith, you guys will succeed always. You guys are awesome 😎 God bless.

[@ThomasELeClair]

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,So many positive words can describe the passion these two have for machinery..................I welcome them to my gearhead family.............People I may never meet , yet our passions sync ....You mention , Faith......The believe , the core , all other virtues follow the faith........

[@user-xi9nn8xx9k]

Your videos are getting better and better!! It's just like a TV show!! (pretty close anyhow)

[@LI-FLKayakFisherman]

Sounds awesome. At least that will give you the opportunity to reinstall the engine correctly on the engine run stand😊

[@izzyryder4969]

That aluminum radiator on the engine room wall would look real nice on your engine test stand. That garden hose rig won't cool the motor properly. You'll get hot spots from air pockets in the block and heads using that system. The water pump needs to be turning also.

[@davidreed6070]

The engine sounds good.

[@dougvaldivia3395]

if you can get refrigeration systems up and running as designed i am sure you can handle the details on this engine.

[@justincase9995]

It leaks because the engine is painted the wrong color,but it sounds good

[@BillyJoeJimBob28]

😂😂

[@hectorraigosa7149]

Cheer up, 100 percent it happened now, then once installed or ran for a bit

[@timmypriddy8385]

❤

[@dthanson56621]

Sometimes you have to put sealer on the flywheel bolts,some are drilled to go into the crankcase and will leak oil if not sealed on the bolts.

[@timcarlisle9598]

Can't wait to fire my big block.make sure you trim the side seals o flat and seal with plenty of sealant.that works everytime for me.good luck

[@roberthuston5508]

I have a buddy who is running a very similar engine with Indy heads . He's running a Proform 1050 carb and his car is a ripper . Dynoed at right around 700 / 700 . 73 Charger

[@robertharwelljr.3939]

My Gen2 Hemi has a chronic rear main seal leak, I've had it apart 5 times, still leaks so I'm currently having the engine rebuilt, I think blow-by is the culprit. I never had this problem with Wedge engines. A vacuum pump or evac hoses from the valve covers to the header collectors helps alot. I hope and pray you have good luck with the FST carburetor, mine ran like garbage, ended up spending $950 on a different brand. My FST would idle good but it wouldn't rev no matter what I tried, and I know my way around carbs.

[@BillyJoeJimBob28]

Welp, the two times he revved this one it sounded Gnarly! Immediate throttle response!! Good luck sealin her up ya'll. 😎👍

[@robertharwelljr.3939]

Yes, that's a good sign for sure.

[@hectorraigosa7149]

O wow, so now I know where Westcoast engine ended up at. They did some rebuilds, but too far now for me. Bummer cause I have a Pontiac 421 HO needing rebuild.

[@33plyrod]

the air holes in the throttle plates are to speed the idle up

[@curtisdanielsforservice4131]

😊 better than previous video

[@markbrown6236]

You caught a bad break, put you will pull through.

[@jesseranos2379]

I like your cars those classic cars it's me Jesse okay

[@jacquelineg3987]

Olivia… you’ll get your beautiful Pontiac. When you trust it it’s a good car!! It will BE !

[@peterolson8350]

Saw some KZbin video about rear seal, CNC type needed a special seal ring

[@toddclark332]

Perfect ❤ it will fix try some black widow mufflers and happy girls month liv

[@donsmith8614]

Like other people said, lucky it wasn't in the car & find out about it now, than down the road. Hope you can fix w/o too much hassle.

[@jmendo2546]

You should be able to spin new gasket on. Did u use grease or vaseline on seal contact surface. So it doesn't start dry and burn up the rubber. Does this aftermarket seal go on, only one way direction. Oil seemed to come out after engine was up to temperature

[@johnjwedrall4290]

Thank you for each of your interesting and informative video. You guys make my day when I watch every video you make. Keep them coming. 👍😀🇺🇸🩵❗️

[@pwthomas757]

👍👍👍

[@paulswan1982]

Sounds good tho

[@jasondiorio]

5:32 "It'll be fun" 😆

[@jefferyhixenbaugh6177]

Check manifold vacuum if low add a vacuum pump

[@normmerkel1969]

When you started it with the first carb sounded like it had a major vacuum leak. Maybe the port on the back of the carb.

[@josephshehan4969]

Those big block mopars are a beast !!:))) thats why you need to prep and break it in ??😮😊

[@duanedahl8856]

Bummer, I have 2 of those seals on the shelf, I was gonna use one on my 528 Hemi...I wasn't planning on using RTV on the seal...I haven't read the instructions yet...I wouldn't do it this way...but if that is what the instructions say.

[@rondejoux8006]

Engine breathers??

[@traviswschneider]

car chemistry makes tiny header muffler might turn them to the side. electric water pump for run stand

[@calid6960]

You two will figure it out, don't let this hiccup discourage you ❤

[@josephrohn4780]

Did you guys use the 440 source blllit seal cap? Cause I had the same problem with my 512 stroker

[@billcobb9408]

check MOPAR JOE 413 build. Same main seal

[@toverturf9097]

Do you even have a crank case vent on your motor because if you don’t that will push seals out.

[@delmascriss7299]

If it is a main i found a cheap seal makes no difference it's always something else 🤔

[@torehelgenes5654]

Did you linebore the mains? When you do, the main cap groove for the seal are not in centre anymore. That can cause a world of hurt with too tight in the block and too loose in the cap. Aka the deapth of the groove compared to the seal.

[@stonebrakerstudio8238]

C00l❤😊

[@tomekwozny1706]

Hello, I have a question whether the black upper part of the new carburetor is plastic or another material?.

[@roberthirshfield3571]

Did you line bore that engine

[@smilsmff]

Holley 1050 Dominator adjusts, 750 or 1050 cfm.Mancini racing sells a 1 piece rear main seal if that is whats leaking. go to mopar place.

[@musclecarczarig4003]

Bummer, but at least its on the stand and not in the car!

[@billcobb9408]

Did the block get line honed?

[@pearlguy6351]

Honestly in my Torino I’ve dealt with rear main seal issues it’s common I ran Lucas oil stabilizer for awhile then ran just oil and stopped turns out I was overfilling engine with to much oil which does cause leakage at real and plus your not really pulling any vacuum out of crank case with it on engine run stand

[@leonhart2452]

This is the first video I have watched o this engine. Did the block get line bored? If so this can be the rear seal leaking issue. Line boring moves the crank up in the block. This changes the way the rear seal fits around the crank. Line boring only moves the crank bearings, it doesnt move the seal mounting. This makes the seal tight at the top of the bearingand loose at the bottom.

[@michaeljoerger9285]

Trying to reach you about a new car show. What’s the best way to reach you guys?

[@mrbizmarky1]

That’s a minor problem be thankful it’s not in the car ! When you run the valves the engine has to be at operating temperature.

[@armondoborjas4362]

Wow that is a bad leak. 🤷🏽‍♂️ may not be the seal ? Yeah good thing it was on the stand 👍🏻👍🏻👍🏻😎

[@jimmyjames7770]

Think of it like this at least it's not in the car

[@rickhunt8603]

Bad, bad, bad to the bone!

[@tonyp8217]

The story of my life… leaking rear main seals 🤬 lol

[@rbarker4426]

99% A vacuum crankcase ventilation system will stop the leak. New rings have blowby. You could modify the oil return passage through the rear Maine cap. I don't think it is the seal itself nice try just a little more trickery it will be fine.

[@paulswan1982]

Damn that sucks I know what’s wrong with it leaking like that though .

[@Anthony12valve440RB]

I would run exhaust to listen for noise and put that engine under a load to get proper ring break in you want it to bite so you don’t burn oil.

[@WestsideCritters]

Cam break in is critical, they should have ran that beast at 2,500 rpm for 20 minutes straight after fire up ! Oil leak wasn’t a factor!!

[@Anthony12valve440RB]

@@WestsideCritters i haven’t followed the build was it a flat tappet cam ? Roller cams don’t need a break in

[@55gaser26]

Roller

[@WestsideCritters]

Bigger issue than main seal Is failure to break that cam in at 1st start up @ 2,000-2,500 rpm for like 20 minutes??? 🤷‍♀️

[@tlr-nut7275]

It's a roller cam.

[@WestsideCritters]

@@tlr-nut7275 ok 👌 thanks

[@georgemesz7850]

where is all the screws

[@Campbase1]

That rear main seal isnt that bad. I did mine while it was in the car...and I corrected the leak