Strange "dents" on exhaust pipe
#1
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Join Date: Dec 2009
Location: Southern Oregon Valley
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Year: 1996
Model: Cherokee
Engine: 4.0 LTR
Strange "dents" on exhaust pipe
To get my 96 Jeep XJ registered in CA, it had to pass a smog check but before doing so, I discovered the PO had removed the check-engine bulb. After replacing the bulb and clearing a former code for the #1 O2 sensor, I found that the exhaust pipe, where it connects to the flange at the collector pipe, has what appears a dent on both sides. These two dents seem to be large enough to cause a restriction in flow. Is this a factory thing for clearance, which doesn't seem necessary, or just the workings of a previous idiot?
I am just wondering if this restriction is what was originally causing the code to activate because the code still occasionaly returns.
Any insight would be greatly appreciated.
I am just wondering if this restriction is what was originally causing the code to activate because the code still occasionaly returns.
Any insight would be greatly appreciated.
#4
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Join Date: Jun 2010
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Year: 1995
Model: Cherokee
Engine: 4.0 HO
That dent is for clearance of the front DS, I found out the hard way by installing a walker pipe and the DS made its own clearance while destroying my header and pinion bearing.
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