cheapest place to find a replacement manifold

its either the manifold or the gasket....sounds like its coming from the top of the motor...are they know to crack up there?

im hoping its a gasket.....but what are my options or suggestions?

 

well if you think its the gasket pull off the manifold and see, then check manifold

 

Great time too put a header on

 

Cracked exhaust manifolds are not uncommon for the 4.0. I had to replace one in the wife's '97 not long ago. It is always possible that it is the gasket only so be sure to check the manifold carefully. Mine cracked at the collector.

Some have success welding them, most do not. I tried. I failed. Your real options are to find a good used one (I did that thanks to a member here, cost me under $100) or go with new. Replacing them isn't the easiest operation as the bolts are difficult to get to with the engine mounted in the engine bay. The gasket is a combo gasket with the intake manifold, so removal of both is required. It won't be a good idea to reuse the old gasket.

Replacing the manifold with a header is another option which is only limited by your wallet.

 

i think Omix Ada sells one for $198
check google

 

If its a cracked manifold then be sure to examine motor mounts.

Worn motor mounts can cause a cracked manifold. And if the mount is still bad, you'll crack your new part fast...

 

i just ordered a replacement header...

http://www.1aauto.com/1A/ExhaustMani...46/250322/1999


from what i read, those were the best ones out there....most people suggested those when other people cracked theres.


My jeep is a commuter, very little off road, mainly just sits in the garage and i drive it on the weekends...so i think it should last a long time...with a warranty too

now suggestions on a muffler, since that has holes, im thinking dynomax ultra flow....love the low tone to it, without getting rapsy

anyone else running that or similar?

 

cheapest, maybe not... http://www.edelbrock.com/media/news/...ve/093008.html

 

x2, they crack for a reason. While you've got the intake off is the best time to replace the drivers side mount anyway.

 

i will

how big of deal is that to fix motor mounts


also arent these things known to crack going hot to cold

its not for sure b/c of a motor mount right?

 

Not hard at all, especially if you have the intake off. A bad motor mount isn't always the cause of a cracked exhaust manifold, but it can be. It'll be pretty obvious to tell if the motor mount is good, I'm willing to bet when you pull the intake you'll see there isn't much left of the mount.

 

really, out of all the jeeps i have had, never had this issue

is a mount something i have to order or can the original be fixed?

 

Most people have bad motor mounts and just don't realize it.

Call a parts store, ask if they have a motor mount.

 

Your local parts store should have them. While you're checking them check the mount to block bolts on the passenger side. IIRC the bolts are too long for the thread in the block so they tend to come loose over time. When I pulled the engine out of my 92 it only had 1 bolt left on the passenger side.

 

ok so i replace both motor mounts or just the drivers side?