1991Jeep_Man

I think my Rear Main Seal is starting to fail, and to make sure I am replacing my VC gasket in case it has a rear leak. Anyway, I also have a cracked header. Which is of higher importance to replace?

What I really want to do is do a complete swap at the same time. While I have the opportunity with the manifolds off as well as clearance under the engine with the oil pan off, I would love to degrease and paint my block. Could the degreasing/painting/exhaust manifold/RMS/and all associated work be done in a single weekend?

Thanks guys.

96_xj

have the header re welded ($25 bucks is probably waht you are going to spend) and change the intake/exhaust manifold gasket($20-$30), oil pan gasket($30-$40) and rear main($5-$10) at the same time. Might as well do the Oil Filter adapter o-ring set ($5 at checkers auto)

rough prices from memory when i did mine.

i have the part numbers for the o-ring set too if you need them. hard to find the part numbers for them... uh!

i re welded my header3 years ago and i have had no issues with it ever since

troy fritz

RMS is the most important.All can be done in a weekend with some buds to help.

1991Jeep_Man

Lol, dont worry. I wouldnt tackle any of this without some help. My cousin and uncle will probably be the ones helping; both with pretty good mechanical experience. Now, what is this oil adapter o-ring? Is it hard to replace?

Gryphon439

This is the o-ring that seals the adapter piece your oil filter spins onto to the block. Most leaks come from that or the rear main seal on the 4.0

Good luck!