Originally Posted By: rslifkin
Originally Posted By: Miller88
When my 2000 finally calls it quits ... I suspect it will be somewhat soon as I'm getting bits of aluminum on oil change now ... It is getting a Renix or early HO short block, oil pump drive for a 2000 and a 02+ TUPY head.
Why not one of the better flowing aftermarket heads and maybe some better bottom end guts? And IIRC, the 96+ blocks are stronger than the early ones, it's just the pistons that got weaker.
Block strength depends. From what I can gather, the early 4.0L block was made of a different material than the HO 4.0L (both cast iron but a different composition, apparently). Chrysler had to add the crank girdle to combat block issues.
Whatever goes in will be getting rebuilt first. I could probably get away with pulling the oil pan and removing / swapping the head to replace the broken piston but the others will do it.
My friend has a 90 and we can wiggle the connecting rods quite a bit. It is whisper quiet ... and that is after he drove it 20 minutes with no oil pressure and rod knock and lifter tick from it not getting any oil. My 2000 sounds like it's going to come apart any day haha