How to install a 2 piece rear main seal with the crank still in the block on my 339 sbc stroker. 

I've had my 305 on the stand For over a week now and I was contemplating changing a rear main on it. After seeing this video I am going to put this on my checklist. Thank you for the video.

Hey square body buddy!! As an engine builder when I do a two piece rear main seal I see guys always put just a little RTV sealant between the two halves!! Me I have always left about a 1/2” to 3/4” of the seal sticking above the bottom of the deck of the block and that way the two halves will meet up in the main cap and be hidden in the main cap it’s self and the other side will be up in the block!!! I’ve done rear main seals this way for years and years and I have never had one fail on me!!! You should definitely give it a try and I promise you that you won’t be pissed!!! Lol!! It just keeps every matting surface in a different spot instead of every thing like the main cap halves, the seal halves, the oil pan corners and even the oil pan seals just not all coming together at the same spot and potentially having a spot for leaks!!! Hopefully that makes since to you??? I’ve definitely been building engines ever since I was going to college classes for being a mechanic while I was still in high school!!! My school didn’t offer mechanic classes so the high school paid my last two years of high school to take classes at a college that offered mechanic classes and they were also classes that offered credits for graduating a college degree!! I was actually the very first person to take advantage of doing this also witch helped me graduate from college two years earlier then most other kids that also took college classes!!! I can tell you that my two last years in high school I was already getting my college credits added up before I had even graduated from high school witch in return helped me out much quicker then going threw my high school 4 years and then doing another 4 years of college classes!!! I already had two years of my college credits by the time I graduated from high school and I probably had the best time ever my high school years also!! I also worked at a machine shop that did engines also for 2 years before I started doing them myself!!! Well buddy awesome video and remember keep up all the hard work buddy and definitely try off setting the two halves of those seals and I guarantee you that you won’t have any issues with them!!! I actually just got done changing a rear main seal on a 1967 Camaro with a 400 sbc in it and the guy said he had a rear main leak in it and wanted it fixed!! After tearing the pan off and taking the rear main cap off I had found that who ever had put the engine together had also put the rear main seal in backwards witch will definitely not work and cause a leak also!! I put a new seal in and off set the seal about a 1/2” or so and it didn’t leak after putting the new seal in the proper direction and off setting the two halves matting surfaces!!!

Thank you so much for making this video. Very helpful to see it done out of frame! I am replacing the rear main on my '80 big 10 because the front went and I figured the rear wouldn't be too far behind as well as putting a new one piece pan gasket in because that was seeping too whislt I am in there.

This is why I like the two piece! Brilliant, you can do it in frame without pulling the engine or trans. The single piece can't be!

First and foremost, thank you for sharing your knowledge. Many grateful people out there. I just wanted to add that ive found an old widdled down toothbrush will aid in removing the seal, since it bends. Wood of course also works. Thanks again and stay safe. Michael

Thanks much. About to do this on a Ford 302 - probably with the engine still in the truck. Seems pretty simple.

Thank you for this. Helped me out big time. Until I found out the guy before me RTVED the old one it. Was a really fun place to visit. But I got it out and used your video to install the new one.

Really information. I was scared to do this on my 84 project truck. Now I feel like I’m more than qualified to get after it.

Looking good Chad I never knew about the little install tool good to know. Rob

Really love this build and looking forward to see how it performs. I have a 305 block and would like to stroke it also. Thanks for sharing 👍🏻

I was searching for these videos about a year or two ago before I did mine in the truck. Only a few years too late for me.🤣

Thanks so much for this buddy!! Doing this now doesn’t seem like so much of a mystery anymore now! 😁👍🏻

Awesome series on this 339 Stroker.. that little engine is looking great.

Excellent video!!! Thanks!

Thx buddy!!! Not so easy with a light under the truck , but I will take my time with a beer 🍺

Great video!

Cool video thanks man 👍🙏

Good video, the 339 is getting closer.

Your video is the best I have seen! Very well done!

A pencil 🤔 Definitely not a bad idea 💡

thank you - very helpful..there isn't an issue reusing the cap bolts due to stretch? Also have 69 Camaro 350 SBC, not sure what year the motor is. What is your advice on verifying the motor has a two piece or one-piece seal BEFORE taking anything apart?

Thanks for the video, gotta do this soon to my little 327...👍

I used a heat gun to help loosen the old upper seal before tapping it out with copper.

Great video boss man. 👍🏻

Great video I’m about too tackle this on my 1978 Gmc 3/4 ton pickup 350 I bought a new oil pump and screen and a rear main seal and oil pan and oil pan gasket, the only thing I have a question on is what is the torque spec for the oil pan bolts?

great video, thank you!

Great information

I bet your wife could make a great living you being a traveling mechanic have you ever thought about that😂, im just messing with you bro,, keep up the great work! 💪

Hey man I think I need to make my own video on where that plastic cap goes that comes in with the rear main seal kit bag. I found my stuck in the middle very confused that it's not explained more thoroughly to install the cap I know it's not a video about that cap but I do need now how to do it lol

Best video , thanks

I have a Camaro I'm about to do and this video is great. One question i have is there a way to tell by just looking at block if its a single or two piece without opening up motor?

Thank you..👍🏼

Hey, where did you get those packaging? I used the original GM parts and other TFvictor brand parts and neither of the 2 brands worked for me, what type of brand do you recommend so that my 350 sbc doesn't leak oil???

What would you clean the cap and bearing with?

Do you have to loosen all main caps to do this

Can you run a one piece rear main crank in a 2 piece block

Awsome

nice video, quick question... would you run a high volume oil pump on a street rod application, and are they any more prone for oil leaks. Iam doing mine now, it has a high volume pump and the rear main is leaking is why i asked. thanks in advance

How are you

Hey I tried your rope trick to replace valve springs. Now the fucking rope is stuck. Any suggestions!!!!!???? Please help. Lol