So I successfully replaced a the left manifold gasket, effectively silencing an exhaust leak. However, in order to install the gasket, I had to undo both manifolds. As I loosened the second bolt on the right-side manifold, I noticed that the bolt pulled out about three rows of the female threads in the engine block, itself. They are essentially fused to the bolt. At least, I could not scrape them out. There was about 2 rows of clean thread at the tip of the bolt before the stripped block threads clogged things up. Needless to say, there is not enough thread to catch so currently the right manifold is sealing with only one bolt.
My question is two-fold:
1) Am I correct in assuming that if I can buy a slightly longer bolt with the same thread pattern, there are more threads deeper in the engine block that the original bolt would not have originally caught, which a longer bolt will?
2) Does anyone know what thread size the manifold bolts are? Normally, I would simply use a thread size checker at my local NAPA, but there is not enough clean thread left to effectively catch anything.
Thanks.