Skip the auto shop - Our mechanics make house calls

Q: Exhaust system repair - do I need new gaskets?

asked by on

I ordered parts for exhaust system repair, there are several flanged joints for Y-pipe and mufflers, do I need new gaskets?

My car has 134000 miles.
My car has an automatic transmission.

A: It depends on what the material of the gask...

It depends on what the material of the gaskets are made of. Gaskets are fairly cheap, so I recommend replacing them. Your other option is to inspect them once the exhaust system is disassembled.

If they are a thin metal, they are reusable and I usually reuse the metal type. If they are a metal laced material, then it should be replaced. If it is a packing or donut, then it should be replaced. Packings are designed to crush and they don’t crush very well the second time around. Some gaskets are flat and made of a fibrous material that is also designed to be crushed.

All gaskets can be reused depending on their condition, so inspecting them is what makes the decision. Personally, since they are fairly cheap, I replace them every time unless they are made of the thin metal type. These are just as good old as they are new.

If you would like further assistance with your exhaust system, a certified professional from YourMechanic can come to your car’s location to scope out the situation and advise you on proper repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Can a bad muffler cause a smog test to fail?

Hello. You need to see why the last smog failure was for. If the failure was excessive O2 in the exhaust test, then it could be the muffler. If it is for high HC or CO then it may be...

Q: What does the three way catalytic converter do?

Controlling engine emissions requires a lot of different components. Catalytic converters are part of your exhaust system, and are responsible for burning off harmful gases, or converting them into something harmless (like oxygen). Catalytic converters use precious metals like platinum,...

Q: Car lacks power

First check your EGR system for leaks. If EGR is on or stuck, at idle, that can cause rough operation. To further diagnose your issue, obtain compression test results (in case the issue is due, even in part, to burned...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...