What are the causes of a head gasket failing or leaking?

Tiny
BRIDGET SEXTON GEORGE
  • MEMBER
  • 2005 CHRYSLER 300
  • 2.7L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
More precisely, how do I know if I can simply replace the valve cover or do I need to replace the whole head gasket? Please help.
Sunday, May 9th, 2021 AT 4:26 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good morning,

Head gasket failure is a result of the engine overheating. Once the temperature reaches a certain point, the gasket fails and allows combustion gases into the cooling system.

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

The valve cover has nothing to do with the head gasket except it must be removed to gain access to the cylinder head for removal.

I attached the procedure below for you to view.

Roy
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Sunday, May 9th, 2021 AT 5:43 AM

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