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Overheating and I hear a knocking noise

Tiny
DAVOBICKHAM
  • MEMBER
  • 2006 PONTIAC GTO
  • 6.0L
  • V8
  • MANUAL
  • 127 MILES
I had to change my upper radiator hose yesterday because there was a hole on it. Coolant was running out the hole so I replaced it. Now my car keeps overheating and I hear a hard knocking noise. It seems like the noise is coming from the hose. I can send a video of the sound. I do not know what the problem is or where to start.
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Tuesday, May 16th, 2017 AT 4:28 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,909 POSTS
Hello,

It sounds like you have a thermostat that is stuck closed which will cause the thumping noise you are describing. Please follow this guide to get the thermostat changed out.

https://www.2carpros.com/articles/replace-thermostat

Here are some diagrams for your car.(BELOW)

Please let us know what happens.

Cheers, Ken

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Friday, May 19th, 2017 AT 11:52 AM

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