Skip the auto shop - Our mechanics make house calls

Q: Should I get my exhaust under coated or is that not s good think to do since it gets hot and I should just leave it alone? Ford F150

asked by on

I have a Ford F-150 with surface rust on my exhaust should I get it under coated or is that a bad idea since it gets hot and just leave it the way it is

Hi there - I would NOT have the exhaust system sprayed with anything - undercoating or rustproofing. Many of these compounds are petroleum based, and will ignite when they get hot enough. Most exhaust systems today are made of either galvanized steel, or stainless steel, and they will last quite a long time from a corrosion-resistance point of view. Best to just let them be. If the exhaust system is scraped, cut or the rust-proof coating is damaged, it can be hand-painted with a cold-galvanizing paint or spray-on rust-proof paint to preserve it.

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!
  • Home
  • Questions
  • Should I get my exhaust under coated or is that not s good think to do since it gets hot and I should just leave it alone? Ford F150

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: My muffler/exhaust sounds loud

If your exhaust rusted out, there may be a good chance your exhaust system may have a leak in it which would explain the louder noise coming form the exhaust. I would suggest having a professional come to your location...

Q: Service engine soon. Light not blinking. Diagnostics engine head radiator hot. I see no problems no overheating?

Hello. Thank you for writing in. It would be beneficial to have the diagnostic codes that were pulled from the scan. Have you checked the level of the coolant? You should start there. Make sure that the thermostat is completely...

Q: Motor swap

Hi there. The best resource for you is a service and repair manual for the 2001 Ford F-250. Even though there are multiple electrical sensors and connectors, these service manuals are still a great resource to give casual mechanics the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...