I have a 1953 CJ3A that has a 153 cid chevy engine installed from a 1965 Chevy 2. The exhaust manifold is cracked and has been previously welded, very poorly, as well as seriously corroded, and I have not been able to locate a replacement unit. I have found a company in the US that makes a header that I am considering but have concerns regarding the intake manifold. On the 153 engine the exhaust and intake manifolds bolt together to assist with pre-heating the fuel/ air mix from the carb to help atomize prior to entering the combustion chamber. The new header does not attach to the stock intake although there is also a water heated intake manifold unit available for a considerable price. My question is will the engine still perform without this direct contact preheat or will the heat from the header , which is in close proximity, provide enough heat to operate. I use the jeep for recreation only as I hunt and fish but don't really want to spend a small fortune to make what should be a simple repair, if I could find a stock replacement exhaust manifold. I have checked with auto wreckers all over North America. It would be cheaper to possibly swap engines.
Oct 13, 2023 at 2:57 PM
