When i shut my truck off i hear a rattle type noise in the engine. Is this normal? The noise is somewhat intermittent. truck has 93k and is a 4.2 5-speed. I'm wondering if it could be bad crank thrust bearings?

 

might need to change the PCV Valve...

 

I think i have the noise isolated to the rear bottom of the engine area. could it be my manual trans slowing down are maybe the cats?

 

See my reply in your other thread............