my motor clatters when it get warmed up. Especially in a head wind. Can new pushrods and rocker arms fix it ?? I have 157,000 miles. Engine has great compression, 128-132 psi, runs good just make a lot of noise under a load ?????? any Idea's ?????
My 4.2 clatters a lot too. It's been bugging me a lot. Yesterday I was investigating and I think its the mechanical fuel pump. Anyone out there with a lot o racket coming from the pump? Mine appears to be newer so I don't think it's bad but I suppose it could be.
I may be nuts but if it is clattering when it warms up and under load it could possibly be wrist pin wear. I remember a chevy my friend had that did that but it clattered and ran for years. So I'm just saying it may not be push rods or rockers. Do you know a good tech that can isolate the noise? Thats where I would start.
I think the 2.5 and 4.2 use the same timing cover and chain, the stock timing gears have plastic teeth, my 89 had about 158000 mile I though it was a rod bearing till I got in it.I took the chain off with out removing the gear it had almost made a hole in the timing cover from the chain hitting it,everthing else had normal wear.
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