This is in regard to a 1994 Plymouth Sundance 4-cylinder 2.5L, which I am trying to restore. The original problem was a rod knocking on one cylinder, I pulled the engine and transmission due to the damaged crankshaft and external leakage of transmission fluid.
I was originally going to have a machine shop clean and repair this engine, but I’m not sure it makes sense to spend $900 in labor plus $300 in parts when I can get a guaranteed good used engine with less than 60,000 miles on it shipped to my door for $1300. Plus I have decided that I want to gain the experience and attempt to repair it myself (hopefully for a lot less money, too.)
I went to a junkyard that has a car with this engine, which was apparently totaled in an accident, and noticed that it had a recent head gasket replacement. I removed and bought the head, which appears to have been professionally resurfaced and was being used successfully with an MLS gasket. However, it is obvious to me that the valve stem seals are worn out, because there is a lot of oil/carbon buildup on the top of the valves and the valve stems. I also have the original head, which looks good, but presumably would need professional resurfacing if I want to use an MLS gasket. In either case, I’d probably want to replace the valve stem seals, and if I did that myself then I’d only have to pay about $100 for the resurfacing.
So my question is what specific tools should I buy in order to replace the valve stem seals, clean up the actual valves, and clean up the threads in the engine block? I.E. what specific valve spring compressor, what specific thread chasing tap, and what specific chemical or cleaning tool should I buy for this job? Any advice (other than to give up and junk the car) would be appreciated.