Write-Up: Thermostat Installation

Subject: Write-Up: Thermostat Installation Fri Jul 04, 2008 6:44 pm

Tools Required:
10mm wrench or socket

Materials needed:
Thermostat (180* recommended) - Intense P/N TST-180 or other brand
Thermostat seal - Fel-Pro P/N 35666 or other brand
Thermostat Housing Gasket - Fel-Pro P/N 35595 or other brand

Difficulty:
*****

Instructions:

*first read albertj & BillBoost37's post below before proceding*

(1) Locate Thermostat Housing
(2) Carefully unplug any vacuum lines obscuring your access to the 10mm bolts on the upper Thermostat housing
(3) Remove the Thermostat Housing Bolts and loosen the upper housing
(4) Move the Upper Theromstat Housing Body attached to the hose out of your way.
(5) Remove the old gasket and clean the ends of both the upper and lower Thermostat housing (Scraping maybe required to remove the old gasket from both the lower & upper Themostat Housing.)
(6) Remove the old Thermostat
(7) Place the new Themostat seal around the new Thermostat. (Look at your old Thermostat to correctly install the seal right end up)
(8) Install the new Thermostat with seal, spring side down
(9) Place the new Thermostat gasket on the lower housing
(10) Replace the Upper Thermostat Housing Body and finger tighten both bolts
(11) Tighten both bolts on the housing equally using the 10mm wrench or socket, making sure the bolts are tightened evenly.
(12) Replug any vacuum lines you removed
(13) Start the engine and let the temperature on your gauge reach 180* plus. Check for leaks around the housing.
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'96 Riv, S/C - 120,790 miles
AL104's, 8mm Accel 9046 Wire Set, Intense 180* Thermostat, Intense 3.5" FWI w/ 9" K&N Filter, Intense MPS w/ ZZP 3.5", Aeroforce Interceptor Scan Gauge, AdjustableTransmission Modulator Valve, 245/35R20 wheels, DHP 1.5

Subject: Re: Write-Up: Thermostat Installation Sat Jul 05, 2008 4:35 pm

MOVED TO SERIES II SC ENGINE & TRANSMISSION...
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Subject: Good work! Sun Jul 06, 2008 11:00 am

Nice job!

The wifes 99 Riv has a "bleeder" screw on the thermostat housing.

Bert:tavis:
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99 Riviera(on the left)
"Cruising Missile"
BoneStockBeauty

70GS455(on the right)
Diplomat Blue
"Howitzer with windshield wipers"

Subject: Re: Write-Up: Thermostat Installation Sun Jul 06, 2008 4:01 pm

mine does too.....what's that for? Releasing the pressure before you remove the upper housing? I guess if you needed to change the thermostat while the engine was still hot that would make sense....
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'96 Riv, S/C - 120,790 miles
AL104's, 8mm Accel 9046 Wire Set, Intense 180* Thermostat, Intense 3.5" FWI w/ 9" K&N Filter, Intense MPS w/ ZZP 3.5", Aeroforce Interceptor Scan Gauge, AdjustableTransmission Modulator Valve, 245/35R20 wheels, DHP 1.5

Subject: Re: Write-Up: Thermostat Installation Sun Jul 06, 2008 4:42 pm

Hi, Mark

The bleeder screw on the thermostat housing is for releasing air trapped in cooling system if and when it's the case that the radiator cap is not the high point when you open the cooling system and close it back up. It just let's you bleed off trapped air.

You definitely have to open the bleeder when you fill coolant after a compete drain and flush. And it is good practice to check it after replacing a cooling component.

Albertj

Subject: Re: Write-Up: Thermostat Installation Mon Jul 07, 2008 6:05 am

I would suggest adding removing 3/4 of a gallon of coolant and adding it back in to the procedures along with the burping process.

Looks great.
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97 Bonneville SSEi: Gen V, N* TB, LQ4 maf, SLP's, LIM air temp sensor, 42lb inj., Mezier WP, PRJ rails and plug wires Intense: FWI, S1X cam. 2000+ parts: Aluminum oil pan, Oil filter adapter, alt, ps bracket, tensioner, fuel rail, broken as always trans