Sealing a 2 Piece Rear Main SBC TTT

[@joesmith306]

Offset where the seals meet from the baring parting line and you'll be fine. I do it all the time, never fails.

[@Sick-Of-It-All]

What he said.... leave one side sticking out of the block the block a few centimeters so the seals dont meet at the same place the block and oil pan meet. This way is just asking for trouble eventually.

[@skippyrocks9745]

True credibilty when I saw you use The Right Stuff, Never build an engine without it lol...

[@cherylstevens9370]

Keep the barbecue in the garage!! Luv it!!

[@backcountryboondockers]

I got the same seal . Bs40096-1. Had i nick missing in the corner brand new from manufacturing. Fel pro.

[@CrazedPerformanceRepair]

I've had that with several brands where the seal has a nick in it out of the box. That would really suck to have on a rear main seal.

[@mattcross428]

I have off set the seal contact point many many times never had one leak I slide one side a 1/4 inch into the block and hang the same amount out of the cap and slip them together. Never had a leak.

[@samrothstein9716]

Not the correct way. Seal is supposed to be offset 3/8 and you should never try to rtv ends the seal together, you're asking for a bigger leak or for a chunks of silicone to wind up in the oil.

[@CrazedPerformanceRepair]

I've tried without rtv with or without big offset like that. This small offset with very small dab of rtv is what I found to work the best for me. I've never had one leak this way except one that had a weird defect on it. The silicone had a spot that was missing like a air pocket was there in the manufacturing process or something. Had that on a Ford 9in axle seal once too, Strange... Anyway, I can't say the same for the other times I installed the rear main seal differently. Seems it always leaks to some extent.

[@gabrielbryant892]

Never seen anyone tap down on the crank with all the pistons and rods hooked up thats odd

[@CrazedPerformanceRepair]

You've never installed one in the vehicle then. Only difference there is this was upside down on a stand.

[@gabrielbryant892]

Why wouldnt u do thebrear main seal and caps first and then hook rods and pistons up im lost i guess

[@CrazedPerformanceRepair]

Seal was backordered or something, I don't recall. That would be the usual way to do it.

[@edgardotapia9884]

Dear friend, it seems to me that the seal is upside down, please check the assembly instructions for this component

[@donmoseley2378]

IT IS IN CORRECT

[@fixitsgarage7903]

Would a 94 5.7tbi have a 2 peace or a 1 peace rear main seal?

[@chickenfoundation9323]

Gm decided to install the 2 piece seals on truck engines after 86 but I’m not sure when they switched over

[@edgeman1134]

@@chickenfoundation9323 1986 was the first year for 1 piece rear main seals actually. 1985 and previous was 2 piece.

[@stephenjohnston226]

👍👍

[@ChrisSmith-me4ow]

Can you do that in the car

[@CrazedPerformanceRepair]

Yes, but it's a challenge.

[@ViewThis.]

I'm seeing nowadays the higher priced SBC 2 pc rear main seals come with an additional O - Ring. I'm trying to figure out why. Anybody know?

[@davidrowland2354]

It's for distributor shaft on oil pump

[@ViewThis.]

@@davidrowland2354 Hah Hah ! You're Funny. The O - Ring I'm talking about is about 2" in diameter.

[@PhysifistEngineering]

This is not how you install that seal. For one, the seal must be offset 3/8 from the split line. You also didn't tell people which way the seal goes. You also should put a film of sealant on the back surface to further help sealing.

[@imaouima]

Groove towards the inside of the block?

[@DavidDuncanscalemodels]

That’s backwards

[@charlesbratten3293]

I have never found a Chevy engine rear main seal from the factory that was installed in the off set position, And I put them back like they came out and never had a problem!