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NoDOHC · 12-17-2010, 09:11 PM

Actually, on high mileage engines, the triangle-shaped part of the apex seal will wear into the rotor. I had good success with switching rotors, as that allowed the triangle an un-worn part of the groove to seal in.

I don't know if that was better or worse, but it worked.

Make sure that you get the three piece seals in correctly. The triangle piece should always touch the rear plate for the rotor (towards the back of the engine). The reason that I am telling you this is that I wore a housing out prematurely (significant wear in 350 miles) using a backwards-installed 3-piece seal. It doesn't matter with the 2-piece seals.

As said before, as long as the seal fit in the groove within the tolerance, you should be Ok.

12-17-2010, 09:11 PM	#30
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	Actually, on high mileage engines, the triangle-shaped part of the apex seal will wear into the rotor. I had good success with switching rotors, as that allowed the triangle an un-worn part of the groove to seal in. I don't know if that was better or worse, but it worked. Make sure that you get the three piece seals in correctly. The triangle piece should always touch the rear plate for the rotor (towards the back of the engine). The reason that I am telling you this is that I wore a housing out prematurely (significant wear in 350 miles) using a backwards-installed 3-piece seal. It doesn't matter with the 2-piece seals. As said before, as long as the seal fit in the groove within the tolerance, you should be Ok. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)