Exhaust 3.7

oddball · **Posted:** Fri Mar 13, 2009 8:36 pm

I've developed a exhaust leak and today I had the KJ ('02 Limited w/ 3.7) in one of our service garages. While standing in the floor pit, we discovered towards the front of the Y-pipe drivers side behind 1st converter, the are two tabs sticking out the topside of the pipe. Best we could figure these tabs were for a heat shield? Which I do not or no longer have. Meanwhile, where one of these tabs is located a small hole has appeared. It can only be seen using a light and mechanics mirror. Meaning pictures are out of the question here.

Yesterday I ordered a Flowmaster 44 diamond plate muffler so we figured to wait until that arrives then the mechanic and I will drop the exhaust pipe, and weld it while doing the muffler at the same time.

So the question is, can anyone confirm the purpose of these tabs? I will then guess if they're for a heat shield, I am obviously missing one?

kj-dec · **Posted:** Sun Jul 19, 2009 8:30 pm

Arise from the dead, ye ancient thread.

I heard chuffing at a drivethrough today; from my car bouncing off the wall. Turns out I also have leaks at the top (both of them) of the headpipe near where it bolts to the cats. I also have what appear to be clips and the leaks are holes around them as if the welds holding them in place have failed.

Vastly annoying since I can't do the work myself due to the HOA rules. Another fun expense getting a new headpipe (probably cheaper than getting it welded up around here assuming there's still enough metal to weld).

No sign of heat shields there; the cats are wrapped in shields, but not the pipe.

oddball · **Posted:** Sun Jul 19, 2009 8:53 pm

I used muffler cement. Worked great.

kj-dec · **Posted:** Sun Jul 19, 2009 11:39 pm

Worth a shot. Turns out the headpipe/crossover pipe is one piece with the main catalytic converter. IOW probably not at all inexpensive. I'll hit the store tomorrow.

tommudd · **Posted:** Mon Jul 20, 2009 12:13 am

kj-dec wrote:

Worth a shot. Turns out the headpipe/crossover pipe is one piece with the main catalytic converter. IOW probably not at all inexpensive. I'll hit the store tomorrow.

my collision replacement books about a year old but shows the front pipe and converters

2002 52128553AB $994.00
2003 52128736AB $722.00
2004 521285599AC $565.00
2005 52129078AC $400.00
2006 52129078AD $ 565.00

muffler cement 5 bucks , saving 989.00 for a lift!!!

kj-dec · **Posted:** Mon Jul 20, 2009 11:11 pm

Quotes in town run $370 - $450 for the part. Cement it is, if it will work. I wish this was on straight sections instead of a curve; it would be a lot easier to fix. I _really_ wish the part was stainless because then this wouldn't be happening...

Exhaust 3.7

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