4bangerjp.com

General Forums => The Mess Hall => Topic started by: TJJim on February 06, 2006, 09:32:27 PM

Title: Broken Manifold Bolt Therory
Post by: TJJim on February 06, 2006, 09:32:27 PM

I've been contemplating this for a while.  So here it goes.

My bolt broke after my 4" lift was installed.  I used the T-case drop and am still using it.  I still have a recurring exhaust leak, solved by the tightening of the flange bolts every so often.  On 2.5l TJ's there is a hanger on the cat that attaches to the skid plate.  The lowering of the the skidplate stresses the exhaust manifold or header enough to cause the rear bolt to shear.  I belive that the only way to solve this, short of insalling a SYE, is to fab up a bracket and mount it to the frame.  This should also work with aftermarket skid plates as well.  

There it is.

Jim

Title: Broken Manifold Bolt Therory
Post by: Bounty Hunter on February 07, 2006, 05:45:21 AM

They commonly break on jeeps with no transfer case drop, both front and rear exhaust manifold studs.

There is a TSB issued for it, the stealership fixed mine for free even though it was way out of warranty.

Title: Broken Manifold Bolt Therory
Post by: Jeffy on February 07, 2006, 11:41:44 AM

There's even a class action but it's only for the 4.0L's.

Title: Broken Manifold Bolt Therory
Post by: Bounty Hunter on February 07, 2006, 12:09:36 PM

And I had always heard about it more with the 2.5L :shock:

The 4.0L boys should do a class action ref. the exhaust manifolds :P

Title: Broken Manifold Bolt Therory
Post by: Jeffy on February 07, 2006, 01:03:32 PM

Oh wait, I think it is for the manifold.  :roll: