Q: Loud popping noise where header and exhaust meet

asked by on

I had an exhaust leak on the left header. Replaced the gasket and fixed it. When I cranked it afterwards, a loud pop was coming from the donut gasket and it would shake the car violently and it happens in random intervals. I don't know if I broke the donut gasket or cracked the header or if it's an exhaust bang. Any ideas on what it could be? Thank you

My car has 68000 miles.
My car has an automatic transmission.

Hi there - the "combustion bang" you hear taking place at the header flange probably indicates a leak at the donut gasket as you suspect. Unburned, or still burning, fuel catches some fresh oxygen at the flange, and ignites, producing the noise you hear. It might help to lean out your carb in the rpm range this occurs - check your plugs for lean/rich clues. It’s also possible your timing is off a tad (not advanced enough).

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Loud popping noise where header and exhaust meet

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Rough idle and sputters while driving

Hey there. This is a common sign of a failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine. This valve is controlled...

Q: Possible hole in muffler

An exhaust system noise accompanied by a strange smell could be an indication of the catalyst deteriorating in the catalytic converter. The exhaust system should be thoroughly inspected, and depending on the mileage, if it is indeed the catalytic converter,...

Q: I'm losing coolant, but I don't know from where

The loss of coolant can be determined with a couple tests. The coolant overflow bottle can have a combustion tester put on it. This will allow you to see if there is any combustion getting into the coolant, indicating a...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.