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Engine overheating idling rough?

Tiny
JASON MCKAY
  • MEMBER
  • 1986 MAZDA B2000
  • 4 CYL
  • 2WD
  • MANUAL
  • 172,000 MILES
My truck is overheating and idling rough with a strong smell of gas. I'm at a loss of what it could be, the reservoir is full of coolant and there are no apparent leaks other than the reservoir overflowing. Help! Thanks.
Wednesday, August 17th, 2022 AT 4:31 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,960 POSTS
This sounds like it is a blown head gasket, but to be sure let's run down this guide to see what you come up with. If you pull the spark plugs out, you might be able to see one of them is cleaned off which will be the cylinder that the gasket is blown in. You can try some blue devil which seems to work pretty good.

Check out this video:

https://youtu.be/Xi41RFMP8Ow

and

https://www.2carpros.com/articles/head-gasket-blown-test

This guide can help as well:

https://www.2carpros.com/articles/engine-overheating-or-running-hot

Please run down these guides and report back.

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Thursday, August 18th, 2022 AT 10:20 AM

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