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SUV is backfiring

Tiny
AAGINVAB
  • MEMBER
  • 2007 CHEVROLET SUBURBAN
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 157,000 MILES
Backfiring blowing the valve cover gasket's out. Combustion fumes in my crank case.
Saturday, October 14th, 2017 AT 11:17 AM

2 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
More information on when the back fire happens, has any work been done on the ignition system? An inlet back fire often is a cross firing ignition or even a burnt inlet valve. Have you done a compression test as yet to prove cylinder integrity?
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Saturday, October 14th, 2017 AT 9:52 PM
Tiny
RENEE L
  • ADMIN
  • 1,257 POSTS
Hello AAGINVAB,

If you decide to conduct the compression test yourself here is a link to an article from our site with written step by step instructions, with pictures and video to guide you:
https://www.2carpros.com/articles/how-to-test-engine-compression

If you have any questions or need further advice please reply to your post and one of experts will be happy to help you.

Thank you for visting 2CarPros and have great rest of your day!

Renee
Admin
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Sunday, October 15th, 2017 AT 3:38 PM

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