Originally Posted by shadygator
I recently blew the motor up in my 2000 4.0L Wrangler. I actually threw a rod through the block. (I'm getting a motor from junkyard). So a friend of mine wants to rebuild it for me, instead of buying a remanufactured motor from a parts store.
Has anyone done this? Suggestions? He also mentioned working the head, putting a different cam in it too. Honing the block. I guess Im looking for links to websites for the parts. Basically needing to be stirred in the right direction.
Then I was told there are different motors for a 2000 4.0L? Some years won't work with other particular models, years, can someone fill me in on this.
If you find a nice low mileage 4.0 you may be able to get away with just rebuilding the top end of the motor i. e. valve train, maybe throw in a better performing Cam and some aftermarket rocker arms and push rods to give you a few more untapped ponies (obviously providing the crank/rod bearing clearences are within spec on the donor motor)
However, unless your friend has a flow bench and he REALLY knows how to port and polish heads properly... you may just end up making the cylinder head perform worse than it was stock.