It is not worth the effort since it will probably just crack again; cast iron does not weld well. Use this as a good excuse to put on a header. I got a nice stainless steel header for my 1991 4.0L...
The block is the same however there are some major changes to the ignition system.The 1998 TJ 4.0L uses a distributor and an external coil mounted to the side of the block, where as the 2001 uses a...
if you are talking exhaust manifold it usually sounds like a loud or worn out muffler. it will also usually have some black soot around the leaking area.