Originally Posted by zipper06
That's a lot of difference from the left bank to the right. Do you have file fit rings or Z gaps. If they are file fit it will decrease on the leak down when warm, but it's the big difference that concerns me. Maybe 6 to 8% with file fit COLD, should be the limit, unless you're running a blown/ supercharged engine.
JMO
Zip.
The rings are file fit and the engine is natural aspirated.
It was the bank with the least leakdown that blued the headers. Could the two facts be connected?
I have a feeling that this new engine is going to have to be opened up again. Now I have to find a good BBC guy in my area. Crap!!