Thermostat

LOOT

MEMBER
PONTIAC GRAND PRIX

1998 grand prix 3.1 L
I want to change the thermostat and dex -cool. I belive the thermostat is off the upper hose. How do I get the housing off? There is a bolt, not on the motor near the hose. What is this? Also how much fluid?

Saturday, October 27th, 2007 AT 4:56 PM

3 Replies

BMRFIXIT

MECHANIC
19,053 POSTS

Last time we did one
the thermostate was at the rear end of the engine by the tranny inthe mid of the intake maifold
has two bolts one u can see the other good luck on that
its hidden by the ex. Cross over pipe
have three gal on hand of dex cool and remember to bleed the air
good luck

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Saturday, October 27th, 2007 AT 5:11 PM

LOOT

MEMBER
3 POSTS

How many bleed ports are there? Is it just the one on the housing? Also do I have to use dex cool if I flush the system?

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Sunday, October 28th, 2007 AT 9:01 AM

BMRFIXIT

MECHANIC
19,053 POSTS

I always used the dex cool and always recommend it

most of them have one but look above water pump housing if u have a black tube with a bleeder on it
open bleeder and fill do not start
when full close bleeder run it for 10 min or untill u have heat inside
shut off let it cool and check the level again
good luck

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Sunday, October 28th, 2007 AT 7:58 PM