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TIP-RM300
For 3” Main blocks
301, 326, 350, 389, 400 cid
Sealing surface approx. 3.188”
Purple in color
Buy here: https://www.tinindianperformance.com/product/pontiac-rear-main-seal-3-inch/
TIP-RM325
for 3.25” main blocks
421, 428, 455 cid
Sealing Surface approx. 3.436”
Black in color
Buy here: https://www.tinindianperformance.com/product/pontiac-rear-main-seal-325-inch/
We also sell rear seal kits that come with sealer:
https://www.tinindianperformance.com/product-category/pontiac-gaskets-and-seals/rear-main-seals/
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Is there a rear main seal replacement kit for the 400 while the engine is in the car?
Hello. I Own a 77 Oldsmobile Cutlass Supreme with a 350 engine. 5.7 Liter. Which Rear main seal would I need? It is leaking quite a bit while it sits. I see you only have Seals for Pontiac. By any chance do you know where I can find the Rear main seal for my 77 Oldsmobile Cutlass Supreme?
I used your 1 piece seal on my 400 using a scat stoker kit. Serrations didn't cause any leakage. Works just as advertised! Thanks!!
My 1968 Pontiac Firebird with a 400 had a rope Wax Seal…
You should mention the modifications needed to the crank
I understand HO Pontiac when they were in business had a neoprene rear main seal it was out of a Cadillac I believe it was a 400 not sure of the year but they said that it was reusable and as long as it wasn't damaged you would never need a seal again ever I was less pounds of torque on the rear main seal as a result
Im gonna need some of your good valve cover gaskets and them reusable intake crossover gaskets and probably more. Thanks for keeping the pontiacs alive
Hi, thank for the video. I have a 1979 Trans Am with 29k original miles. The rear main seal is leaking. Is it possible to change the rear main seal with the engine in the car…or…must I remove the engine to replace the rear main seal. Thank you