2008 JKU Rubicon Exhaust leak- Help!!
I recently pulled the heads off and fixed a valve seat that was bad. I had the heads machined and trued up the block to match- within .001/inch. No problem there. When I put it all back together, fired right up! Only thing is I now have a Super loud exhaust leak. I checked and the stock header was cracked - as they are prone to do, being cast iron and all, so I replaced them with a set of stainless. I fired it up and...no change! Still a loud leak. I checked all bolts, repositioned the header and collector 2 or 3 times now with no change. I replaced the manifold gaskets twice- all with no change. It sounds like it is coming from the drivers side manifold area but it is hard to tell for sure.
I can't find where it is at and at idle it goes almost completely away. Under load it is way loud. Any tips or advice would be greatly appreciated Thanks CJ |
I'd try a small mirror tool that extends on a rod/handle. Use a flashlight and look for discoloration from a leak. It might be a defect in the stainless headers, maybe where the flange mates to the head. Check the old gasket from the last replacement for signs of a poor seal.
Hate to say this, but headers tend to have more problems than the cast manifolds. Keep an eye on spark plug wires, and how they are/were shielded from heat. :cheers: |
Originally Posted by Mr.T
(Post 4350037)
I'd try a small mirror tool that extends on a rod/handle. Use a flashlight and look for discoloration from a leak. It might be a defect in the stainless headers, maybe where the flange mates to the head. Check the old gasket from the last replacement for signs of a poor seal.
Hate to say this, but headers tend to have more problems than the cast manifolds. Keep an eye on spark plug wires, and how they are/were shielded from heat. :cheers: |
Originally Posted by CJ'sJKUR
(Post 4350054)
Thanks for the info. I'm thinking it's more than an exhaust leak ( in addition to, actually) leaning towards piston slap also.
Stay in touch, :cheers: |
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