Thermostat Bolt removal issue?

DANIEL NELSON2

MEMBER
2003 CHEVROLET MONTE CARLO
2WD
AUTOMATIC
118,000 MILES

I need help getting off the bolts that hold the thermostat the bottom one in particular.

Sunday, November 12th, 2023 AT 11:24 AM

6 Replies

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

I need to know which engine you have. Is it a 3.4L or a 3.8L? (See pic below).

Let me know. If it is the 3.4, you will need to remove the crossover pipe.

Take care and I'll watch for your reply.

Joe

See pic below.

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Sunday, November 12th, 2023 AT 8:52 PM

DANIEL NELSON2

MEMBER
35 POSTS

It is the 3.4.

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Tuesday, November 14th, 2023 AT 9:19 AM

DANIEL NELSON2

MEMBER
35 POSTS

How do I take off the crossover pipe?

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Tuesday, November 14th, 2023 AT 9:20 AM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

Hi,

Yep, you have to remove the exhaust cross-over pipe to access the thermostat. I attached the directions below.

The first four pics are for thermostat replacement. In pic 2, I highlighted what needs to be removed. The cross-over pipe directions start with pic 5.

Let me know if this helps.

Take care,

Joe

See pics below.

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