BALLSS

opinions, Rubber or Teflon Felpro

IIRC OEM was rubber

BoostedDSM

iTrader: (6)

I have the Felpro on mine, no issues with over 3k of driving.

94FBIRD

iTrader: (5)

I just bought the Felpro teflon rear main seal at Advance Auto only $20. The rubber one was $22. Totally leak free. The teflon RMS goes on the crank without any lube.

BALLSS

this one was recommended by my machine shop

felpro # 2919 high performance silicone seal

http://www.summitracing.com/parts/fel-2919/overview/

anyone use this?

leadfoot4

iTrader: (1)

I've used it also.....

BALLSS

on a LT1?

is it rubber or silicone??

leadfoot4

iTrader: (1)

I think it's more of a Teflon seal. From what I understand, GM went to this seal in the 1997 model year, in an effort to cure one of the LT1's numerous oil leak sources. When I installed this seal in my car, I found oil in the screw holes where the seal retainer attaches to the block. I have no idea how oil got in there, but when I reinstalled that part, I put a dab of thread sealer on the bolts, just for insurance....

BALLSS

the 2919 is not the Teflon seal. It is designed for race motors running vacuum pumps

the "teflon" one you note is # 40626 and the rubber seal is 40520

yeah GM switched to the teflon one in 97

I am going with the rubber one.