[attentionwhore]

I picked up a 4.0 from a guy at work to swap into my yj. The drivetrain has been sitting in the bare frame outside under a tarp for about 2 years. From what I am told it has approximately 110k miles on it. I have planned to disassemble the engine to change all the gaskets, but I am unsure what else to address. Would it be wise to do a water pump and/or timing chain while I am at it and where would be a good place to source the gasket kits from. Would the kits that quadratec or 4wd hardware sell be good or should I stick with Mopar OEM replacements? Thanks

[jeepdaddy2000]

My suggestion is to skip the gaskets, unless you feel they are already leaking. Seems that once folks go down that road, they wind up either screwing up a good seal/gasket, or go into "well, I've gone this far, might as well rebuild the whole thing" mode.
With 110K, I would skip the T/C (you can check it by rocking the crank back and forth while observing the rotor for movement), but since it was sitting outside, perhaps a water pump and t stat replacement would be in order.
I would change the oil, pull the dist, then run the oil pump till you get oil through the rockers.
Insure the cooling system hasn't gathered any critters.
Pressure wash the block prior to installation.
In the end, you can go as far and replace as many components as you feel comfortable doing.

[rjbruzan]

I would do the rear main seal and oil pan gasket as it is easy and relatively inexpensive. Also the oil filter adapter seals. under 75 bucks for all the parts.
Ron

[attentionwhore]

What about where to source the gaskets?

[rjbruzan]

Napa,Oreillys ,Advance,Rock Auto or Autozone as long as they are Felpro brand.
Ron

[attentionwhore]

New question, I pulled the trans off the block ( glad I did because I found a mouse nest in the bell housing) and noticed the the block is actually a reman mopar block with a 1998 date code. So when I get parts for it, like a new water pump, would I get one for a 98 engine or a 92 which was the year of the Jeep the engine came out of?

Edit* So upon further inspection I find it has a 2686 head which is 87-90 Cherokee and a 405 block which is 92-95 Wrangler/Cherokee.

[rjbruzan]

Your edit answers the questions.