BMW Z3 Project

I have been able to drive the car when the weather is good.  So far I have 325 miles logged. It is running great and is a hoot to drive.  If you punch it, the rear end will break loose. I tape marked the coolant reservoir and have been watching the level.  So far the coolant level has been stable.  So, I think the cylinder head is crack free. I am a little disappointed with the check engine light.  I cleared all the codes and after running 100 miles the check engine light returned.  The code was for catalytic converter efficiency.  So I think the previous engine dumped enough coolant down the exhaust to case damage to the catalyst.  I heard you could clean the catalytic converter with citric acid.  So I may try that. I currently have the seats out of the car.  I have cleaned the leather, shampooed the carpet.  And I replaced the worn out bushings in the power seat adjusters.