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Chevrolet
Monte Carlo
Engine Cooling
Thermostat
Thermostat bolt removal issue?
2003 CHEVROLET MONTE CARLO
118,000 MILES • 2WD • AUTOMATIC
DANIEL NELSON2
MEMBER
44 POSTS
I need help getting off the bolts that hold the thermostat the bottom one in particular.
Nov 12, 2023 at 3:24 AM
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JACOBANDNICKOLAS
✓
Experienced Mechanic
110,246 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.
Image (Click to enlarge)
Nov 12, 2023 at 12:52 PM
DANIEL NELSON2
MEMBER
44 POSTS
It is the 3.4.
Nov 14, 2023 at 1:19 AM
DANIEL NELSON2
MEMBER
44 POSTS
How do I take off the crossover pipe?
Nov 14, 2023 at 1:20 AM
JACOBANDNICKOLAS
✓
Experienced Mechanic
110,246 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.
Images (Click to enlarge)
Nov 14, 2023 at 6:52 AM
DANIEL NELSON2
MEMBER
44 POSTS
What size are the bolts because I lost one?
Nov 14, 2023 at 8:23 AM
JACOBANDNICKOLAS
✓
Experienced Mechanic
110,246 POSTS
Hi,
That type of information isn't provided in my manual. Is it possible to remove one of the other two and have it sized for replacement?
Let me know.
Joe
Nov 14, 2023 at 8:30 AM
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