Rotary Car Club - View Single Post - Polishing Rotors

NoDOHC · 09-12-2010, 10:13 PM

Back from the dead!

I finally got around to replacing the engine. I didn't tear it down, as it is in great shape, makes good compression and purrs like a kitten with 13,000 miles on it - it seemed a shame to tear it down.

I built a new engine, but as I compared the two engines side by side, the new one is not as carefully ported as the old one (I wish I had the time, but I realized that winter was coming so I didn't spend as much time on the second build). I still think it should run well, just not as good as the first one.

Anyway, I took the old engine out and snapped a few photos of the condition of the rotors after 13,000 miles (OMP and Premix).

This is the only one that turned out. You can see the carbon deposit in the exhaust port reflecting in the rotor face.

All faces of both rotors were a nice golden-brown and there was no carbon to be found.

I wish that I had a better camera, I can see down in the chamber fine, but the camera can't. I will try messing with the lighting tomorrow and get some better pictures.

EDIT:
Better Pictures.... Well it seems that I got 2 3-piece seals and 4 2-piece seals the last time I bought some, I was building another engine and found this out, requiring me to tear the old 8.2:1 engine down for it's seals. I was sad to do it, but not too much, as I wanted better pictures anyway.

All three faces of the rear rotor looked the same:

One face of the front rotor didn't look so good:

09-12-2010, 10:13 PM	#36
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	Back from the dead! I finally got around to replacing the engine. I didn't tear it down, as it is in great shape, makes good compression and purrs like a kitten with 13,000 miles on it - it seemed a shame to tear it down. I built a new engine, but as I compared the two engines side by side, the new one is not as carefully ported as the old one (I wish I had the time, but I realized that winter was coming so I didn't spend as much time on the second build). I still think it should run well, just not as good as the first one. Anyway, I took the old engine out and snapped a few photos of the condition of the rotors after 13,000 miles (OMP and Premix). This is the only one that turned out. You can see the carbon deposit in the exhaust port reflecting in the rotor face. All faces of both rotors were a nice golden-brown and there was no carbon to be found. I wish that I had a better camera, I can see down in the chamber fine, but the camera can't. I will try messing with the lighting tomorrow and get some better pictures. EDIT: Better Pictures.... Well it seems that I got 2 3-piece seals and 4 2-piece seals the last time I bought some, I was building another engine and found this out, requiring me to tear the old 8.2:1 engine down for it's seals. I was sad to do it, but not too much, as I wanted better pictures anyway. All three faces of the rear rotor looked the same: One face of the front rotor didn't look so good: __________________ 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) Last edited by NoDOHC; 10-12-2010 at 10:50 PM.