Hi guys,

I recently bought an s4 Rx7 with a 13b turbo bridgeport setup. I was told it was rebuilt 500ks ago. I drove it for around 100ks and gave it no abuse at all and ran fine the whole time. I then started it the next day and clouds of white smoke came out of the exhaust and did not stop. I took the exhaust manifold off and inpected the rotors as shown in the video.

Exhaust port video

Both rotors have the same gritty buildup, Any idea what this is? as it does not seem to be simply carbon buildup, thanks.

 

tee kay test

 

I watched the video and it looks like a boat load of carbon and oil. Unless my eyeballs are screwed up, you can see unburnt oil on the trailing side of the rotor face.

Are you premixing? I bet that white stuff is ash.

When I first bought my car 6 years ago the oil metering pump took a dump a few hours after driving it home (S5). It still worked but the ECU couldn't see it causing the famous limp mode. Since it was still working and upon failure, goes to 50% mode at all times, I started to get white ash deposits in my exhaust very quickly.