Hillsborough County schools get out May 25 for the summer break. ChaCha on! 7 years ago
Â· just now. Report Abuse. A cast iron manifold will expand and contract, the JB Weld will not. I think JB Weld is fantastic stuff (have some as we speak) but not for a cracked exhaust manifold.You can always check out their website: http://jbweld.net/index.php I only have experienced JB with cast though, if your manifold is another material you may get lucky.ource(s): Q: Will J-B Weld work on an automotive exhaust? A: Because of the extreme temperatures of exhaust systems, we do not recommend J-B Weld for use on exhaust manifolds and catalytic converters.
DIY - Snapped exhaust manifold stud removal. Here is a little write up on how to remove the ever-so-common broken. exhaust manifold stud, but can be used to get out other broken bolts. ***DISCLAIMER***. The work and procedures shown and described in these world-wide web. files are intended for use by people having average skill and knowledge of. the subjects.