how do i replace t-stat housing???
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Senior Member
Joined: Sep 2004
Posts: 952
Likes: 6
From: PITTSBURGH, PA
Car: 85 IROC-Z Z-28, BLUE & SILVER
Engine: 5.7L & 5.0L
Transmission: 700R4
Axle/Gears: FACTORY
how do i replace t-stat housing???
i bought a new t-stat and gasket but i dont know how to change it... how do i get the new unit inside the rad cap??? heres a pic...
Supreme Member
iTrader: (1)
Joined: Dec 2006
Posts: 2,403
Likes: 4
From: ms. gulf coast
Car: 91 R/S , 89 dodge p/u
Engine: L31 GM crate re-cammed , 318
Transmission: T-5 , 4 speed auto
Axle/Gears: 3.42 , ?
Re: how do i replace t-stat housing???
thermostat is not under radiator cap . follow upper radiator hose to engine . the metal part the hose connects to is the thermostat housing . remove the 2 bolts and remove it . there is the thermostat . good luck .
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Joined: Mar 2011
Posts: 2,893
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From: Central Texas
Car: GTA
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: Aussie 9-bolt/3.27 posi
Re: how do i replace t-stat housing???
It doesn't go under the radiator cap. It goes under the water outlet on top of the intake. 2 bolts (can be 1 bolt & 1 stud with a nut on it) hold that down, but on TPI the throttle body make is a little harder to reach than on a carb'd or TBI car.
If the bolt and/or the stud break off? You are in a world of hurt trying to get the broken part out. Trust me on that.....
If the bolt and/or the stud break off? You are in a world of hurt trying to get the broken part out. Trust me on that.....
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Joined: Jul 2001
Posts: 3,204
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From: New Boston, IL, USA
Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
Re: how do i replace t-stat housing???
Thermostat is in the intake not the radiator. Follow the upper hose coming out of the radiator to the intake. You should see 2 bolts on the metal housing bolted to the intake. You loosen those bolts and the housing will pop loose. The gasket goes between the intake and that housing. The thermostat sits under that housing on a recessed lip. You'll lose some coolant. You can either drain some out of the radiator on the lower corner using the valve or you can use a towel to soak it up. Make sure you replace the coolant with pre-mixed or 50/50 water to pure antifreeze.
Junior Member
Joined: Jan 2011
Posts: 65
Likes: 0
From: Kansas
Car: 1992 Z/28
Engine: 5.7 TPI
Transmission: 700R4
Re: how do i replace t-stat housing???
On a TPI car, it's alot easier to remove the TB to give you plenty of room to get to the housing....It's only a few extra minutes to remove the TB, and saves you alot of headaches...........
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Supreme Member
iTrader: (8)
Joined: Jul 2001
Posts: 3,204
Likes: 7
From: New Boston, IL, USA
Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
Re: how do i replace t-stat housing???
I've done it without removing the throttle body. IMO it's just one more thing to worry about. Especially since this is a 700r4 car.
Supreme Member
Joined: Apr 2002
Posts: 3,552
Likes: 5
From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
Re: how do i replace t-stat housing???
Also I didnt see a thermostat gasket in your pic, make sure you have a replacement before you begin.
Supreme Member
iTrader: (8)
Joined: Jul 2001
Posts: 3,204
Likes: 7
From: New Boston, IL, USA
Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
Supreme Member
Joined: Apr 2002
Posts: 3,552
Likes: 5
From: New Jersey
Car: 86 Corvette, 89 IROC, 1999 TA
Engine: 350, 350, LS1
Transmission: 700r4, 700r4, T-56
Axle/Gears: 3.07, 373, 4.10
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