Engine Rattle!!! Help!!!!
Engine started to rattle about a week ago. When revved it kind of gets drowned out. Took it in to shop about where they thought it might be a valve issue. Said he tried to adjust the valves but no luck and said the sound is coming from the bottom. His guess is its one of the gudgeon pins. He is by no means a jeep expert. The engine runs and drives fine. What is my next step? Its a 91 4.0 5 speed. I've been looking into just replacing it and it seems that only 91 4.0 speeds will work. Is this true? Whats the difference between a 95 4.0 and a 91? Also between engines with manuals vs. automatics? Are there any parts that could be swapped to make other 4.0's work?