71 Duster 360 turbo build
So it was running strong, and things looked good initially. Then, oil everywhere that didn’t make sense. Coming out from under the valve covers, but little from the breathers. Compression/leak down test was great. Turned out the exhaust crossover had burned through the gaskets(felpro 1213(not s3)), and was blowing exhaust straight up under the valve cover lip. I believe a need for a thicker gasket contributed to the problem.
Unfortunately, I only figured out the above issue because shortly after it was stumbling and I had a dead cylinder; #8.
So it was running strong, and things looked good initially. Then, oil everywhere that didn’t make sense. Coming out from under the valve covers, but little from the breathers. Compression/leak down test was great. Turned out the exhaust crossover had burned through the gaskets(felpro 1213(not s3)), and was blowing exhaust straight up under the valve cover lip. I believe a need for a thicker gasket contributed to the problem.
Unfortunately, I only figured out the above issue because shortly after it was stumbling and I had a dead cylinder; #8.