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How do I replace the thermostat on a 1997 Chevy Lumina?

How do I replace the thermostat on a 1997 CHevy Lumina 3100 SFI V6?

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SOURCE: replacing thermostat on 3100 sfi v6

1. drain coolant from radiator
2. unbolt and remove the water neck from the engine block (it's attached to the upper radiator hose) and scrape any leftover gasket material off of the mating surface w/ a razor or gasket scraper, being careful not to actually gouge the metal
3. pull thermostat out of engine block (it's easy to see w/ the water neck off)
4. scrape any gasket material off mating surface on engine side, being even more careful not to gouge the metal here
5. place new t-stat on engine side opening
6. place gasket over the thermostat (you can put a thin bead of RTV sealant on both sides of the gasket if you wish, some people think it's overkill, but i hate doing things twice)
7. replace water neck
8. refill cooling system, use the little brass bleeder screw on top of the motor to bleed out the air until a steady stream of coolant is coming out after the engine is warmed up. close the screw.

Posted on Sep 29, 2009

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Replacing thermostat on 3100 sfi v6


1. drain coolant from radiator
2. unbolt and remove the water neck from the engine block (it's attached to the upper radiator hose) and scrape any leftover gasket material off of the mating surface w/ a razor or gasket scraper, being careful not to actually gouge the metal
3. pull thermostat out of engine block (it's easy to see w/ the water neck off)
4. scrape any gasket material off mating surface on engine side, being even more careful not to gouge the metal here
5. place new t-stat on engine side opening
6. place gasket over the thermostat (you can put a thin bead of RTV sealant on both sides of the gasket if you wish, some people think it's overkill, but i hate doing things twice)
7. replace water neck
8. refill cooling system, use the little brass bleeder screw on top of the motor to bleed out the air until a steady stream of coolant is coming out after the engine is warmed up. close the screw.

Sep 29, 2009 | 1998 Chevrolet Lumina

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Here is a diagram of your motor with the firing order:

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Where is the thermostat located on a1999 lumina v6?


Grab top radiator hose, and follow back to engine. The part the hose is clamped to is the thermostat housing.
Remove the hose, and 2 bolts for the housing and the thermostat is revealed.

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