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Thermostat replacement

Tiny
TWINMARK44
  • MEMBER
  • 1999 PONTIAC GRAND AM
  • 2.4L
  • 4 CYL
  • 260,000 MILES
Located the thermostat housing and removed the two 8mm bolts. I don't know how to drop the housing down to expose the thermostat for removal. I've heard about a 13mm bolt that has to be removed but I can't find the 13mm bolt. If someone could just explain to me where it is or send me a diagram, I'd be able to finish the job.

Thank you
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Saturday, December 4th, 2021 AT 12:41 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

The third bolt is toward the bottom. You will find it if you follow the tubing. Replacing the thermostat does require the removal of few items including the exhaust manifold heat shield, wheel, and splash shield.

Here are some best practices when replacing the thermostat:

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

I have attached the replacement procedure for your vehicle below.

Please let me know of any questions.
Thank you.
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Saturday, December 4th, 2021 AT 6:47 PM

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