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Thermostat crack

Tiny
SONOFNUN777
  • MEMBER
  • 2007 CHRYSLER 300
  • 2.7L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 116,000 MILES
What would cause the thermostat housing not only crack but, a chunk blew off and of course spewed anti-freeze all over. I know it overheated but what would be the root cause? Thermostat stuck, low anti-freeze?

Thanks

Josh
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Wednesday, July 10th, 2019 AT 6:30 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

Was any work done before this happened?

It could be from excessive pressure? If it was, that tells me the pressure cap is bad. It should release pressure at 16 lbs.

Roy
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Wednesday, July 10th, 2019 AT 7:23 AM
Tiny
SONOFNUN777
  • MEMBER
  • 6 POSTS
The only work done was a replacement of coil pack on cylinder #4 as well as spark plugs being replaced.
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Wednesday, July 10th, 2019 AT 7:37 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, I would suspect a pressure issue resulting in the failure. I would have the pressure cap tested, the housing and the thermostat replaced.

Roy
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Wednesday, July 10th, 2019 AT 7:50 AM
Tiny
SONOFNUN777
  • MEMBER
  • 6 POSTS
Excellent, will do. Would the thermostat need to be changed as well?
Thanks
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Wednesday, July 10th, 2019 AT 8:13 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Yes, I would change it as well.

You are welcome.

Always glad to help.

Roy
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Wednesday, July 10th, 2019 AT 8:16 AM

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