Rotary Car Club - View Single Post - Re-using stock seals

NoDOHC · 06-26-2010, 10:59 PM

The factory service manual has an extensive section on checking for wear. There is really nothing wrong with using the old seals over again, as long as they are in spec (although I am a little sceptical of 3-piece seals). If the engine really only has 60k on it, you may be ok, my guess is that the apex seal will be worn on the side, causing it to fit the groove loosely.

I hope that your friend understands that if the parts don't spec out, you will have to replace them. (I think that apex seals alone are about $360.00 if you buy them from the Mazda dealer).

I tore down an 80,000 mile rotary once that had in-spec apex seals. I have seen many more with similar mileage that had the sides of the seal worn.

If I could find an old seal (I don't remember where I put my seal stash) I could get you a picture.

06-26-2010, 10:59 PM	#2
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	The factory service manual has an extensive section on checking for wear. There is really nothing wrong with using the old seals over again, as long as they are in spec (although I am a little sceptical of 3-piece seals). If the engine really only has 60k on it, you may be ok, my guess is that the apex seal will be worn on the side, causing it to fit the groove loosely. I hope that your friend understands that if the parts don't spec out, you will have to replace them. (I think that apex seals alone are about $360.00 if you buy them from the Mazda dealer). I tore down an 80,000 mile rotary once that had in-spec apex seals. I have seen many more with similar mileage that had the sides of the seal worn. If I could find an old seal (I don't remember where I put my seal stash) I could get you a picture. __________________ 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)