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INSTALLED MUFFLER BACKWARDS, DROVE IT A WEEK BAD PERFORMANCE…

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INSTALLED MUFFLER BACKWARDS, DROVE IT...
INSTALLED MUFFLER BACKWARDS, DROVE IT A WEEK BAD PERFORMANCE BACK FIRE REDID THE MUFFLER NOW THERE IS A CLUNK NOISE AND SOMETIMES ENGINE WON'T TURN OVER SECOND RESTART IT STARTS SMOKE SOME LIKE BURNT OIL AT THE COLLECTOR IN THE EXHAUST THEN GOES AWAY
BENT VALVE?
Submitted: 2 years ago.Category: Jeep
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Answered in 7 minutes by:
2/23/2016
Jeep Mechanic: Juan Crespo, ASE Certified Technician replied 2 years ago
Juan Crespo
Juan Crespo, ASE Certified Technician
Category: Jeep
Satisfied Customers: 1,532
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
Verified

A single bent valve wouldn't cause an engine not to start, on the same vein as a muffler installed backwards should not cause an engine to backfire or bend valves. Why was the original muffler replaced?

Most importantly, what vehicle are we working on? Year, make, model, engine size, gas or diesel, auto or stick, 2 or 4WD?

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