replace thermostat in a TJ - JeepForum.com

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post #1 of 119 Old 03-16-2008, 12:46 PM Thread Starter
dogbluedrummer
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replace thermostat in a TJ

Any secrets here? It's just 2 bolts, a new thermostat, and a gasket right?
I will spread a little RTV on the gasket. Anything else?


Patriot Blue 2001 TJ
Everything I need to fix on the heep: ABS indicator, speed 4 on the blower fan, torn softop over driver's head, both seat release/tilt cables, missing center cap on spare, broken under hood light, wire up the CB, wiring problem with the reverse lights, broken bottle jack, leaky front and rear pinion seals, loose trackbar relocation bracket, torn drivers seat on the side, broken center console lock, lost nuts for door hinges, squeaking centering ball, loose parking brake cable, oil change and rotate the tires.
My build threadhttp://www.jeepforum.com/forum/f22/free-wife-good-home-pics-included-528892/
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post #2 of 119 Old 03-16-2008, 12:48 PM
TheBoogieman
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U got it,oh antifreeze will come out.
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post #3 of 119 Old 03-16-2008, 12:52 PM Thread Starter
dogbluedrummer
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Got it. I have a little to top it off. Thanks.

Patriot Blue 2001 TJ
Everything I need to fix on the heep: ABS indicator, speed 4 on the blower fan, torn softop over driver's head, both seat release/tilt cables, missing center cap on spare, broken under hood light, wire up the CB, wiring problem with the reverse lights, broken bottle jack, leaky front and rear pinion seals, loose trackbar relocation bracket, torn drivers seat on the side, broken center console lock, lost nuts for door hinges, squeaking centering ball, loose parking brake cable, oil change and rotate the tires.
My build threadhttp://www.jeepforum.com/forum/showthread.php?t=528892
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post #4 of 119 Old 03-16-2008, 02:18 PM Thread Starter
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Replacement write-up

Here is a basic set of unoffical instructions for replacing your thermostat.

What you need:
1/2" standard socket and ratchet wrench
1/2" deep well socket or socket extension
RTV sealant
New 195 degree thermostat (Auto Zone #15359 for $8)
New gasket (Auto Zone #35630 for $3)
Gasket scraper or putty knife
Rag
Bucket
1/2 gallon of engine coolant (50/50 mix)

This is a thermostat and its gasket.



...more to come...

Patriot Blue 2001 TJ
Everything I need to fix on the heep: ABS indicator, speed 4 on the blower fan, torn softop over driver's head, both seat release/tilt cables, missing center cap on spare, broken under hood light, wire up the CB, wiring problem with the reverse lights, broken bottle jack, leaky front and rear pinion seals, loose trackbar relocation bracket, torn drivers seat on the side, broken center console lock, lost nuts for door hinges, squeaking centering ball, loose parking brake cable, oil change and rotate the tires.
My build threadhttp://www.jeepforum.com/forum/showthread.php?t=528892

Last edited by dogbluedrummer; 03-16-2008 at 02:46 PM.
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post #5 of 119 Old 03-16-2008, 02:24 PM Thread Starter
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Step 1

Place a bucket under your jeep, right in the midde and a little behind the radiator.

Locate the thermostat housing, it is the metal thingy where the 2 hoses connect, right behind the fan blade.



Unhook the large radiator hose. This will give you a little more room and flexibility.



There are 2 bolts, one in the front center, and the other at the 7 o'clock position. That will be a little tight as the serpentine belt runs right next to it. Unbolt both of them. Coolant will drain out! Adjust bucket as necessary.


Swing up the manifold and scrape off the old gasket.


Make it pretty!


Pull out the old thermostat.


CONGRATULATIONS! You are half way done!

...more to come...

Patriot Blue 2001 TJ
Everything I need to fix on the heep: ABS indicator, speed 4 on the blower fan, torn softop over driver's head, both seat release/tilt cables, missing center cap on spare, broken under hood light, wire up the CB, wiring problem with the reverse lights, broken bottle jack, leaky front and rear pinion seals, loose trackbar relocation bracket, torn drivers seat on the side, broken center console lock, lost nuts for door hinges, squeaking centering ball, loose parking brake cable, oil change and rotate the tires.
My build threadhttp://www.jeepforum.com/forum/showthread.php?t=528892
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post #6 of 119 Old 03-16-2008, 02:28 PM Thread Starter
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Oops....a little more work. Scrape the old gasket off the big hole down there. Also, the thermostat rests on a little recessed ledge. Can you feel it? Yep, wipe all that old gunk out of it.



Back to the manifold. Smear some RTV on the gasket.....both sides!!



All right! You're doing great. Grab the new thermostat and put it in. Careful. Line it up.



Great! Now put the manifold back over it and bolt it down. Top off your radiator with the 50/50 mix.

YOU ARE DONE!

Patriot Blue 2001 TJ
Everything I need to fix on the heep: ABS indicator, speed 4 on the blower fan, torn softop over driver's head, both seat release/tilt cables, missing center cap on spare, broken under hood light, wire up the CB, wiring problem with the reverse lights, broken bottle jack, leaky front and rear pinion seals, loose trackbar relocation bracket, torn drivers seat on the side, broken center console lock, lost nuts for door hinges, squeaking centering ball, loose parking brake cable, oil change and rotate the tires.
My build threadhttp://www.jeepforum.com/forum/showthread.php?t=528892
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post #7 of 119 Old 03-16-2008, 02:37 PM
Jerry Bransford
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I'm no fan of RTV for this particular job, I'm one of those that believes a standard paper gasket is the way to go for the thermostat housing.

Getting Savvy...

When you have a choice, buy American.
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post #8 of 119 Old 03-16-2008, 02:41 PM Thread Starter
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Where were you an hour ago..................?

Patriot Blue 2001 TJ
Everything I need to fix on the heep: ABS indicator, speed 4 on the blower fan, torn softop over driver's head, both seat release/tilt cables, missing center cap on spare, broken under hood light, wire up the CB, wiring problem with the reverse lights, broken bottle jack, leaky front and rear pinion seals, loose trackbar relocation bracket, torn drivers seat on the side, broken center console lock, lost nuts for door hinges, squeaking centering ball, loose parking brake cable, oil change and rotate the tires.
My build threadhttp://www.jeepforum.com/forum/showthread.php?t=528892
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post #9 of 119 Old 03-16-2008, 02:51 PM
Jerry Bransford
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One more thing... if your thermostat comes with a small hole in the flat flange, that is there to help "burp" the cooling system free of bubbles. Orient the thermostat so that hole is at the very top. It's also cool to drill a small hole like 1/16" for the same purpose.

Sorry on not being here an hour ago, I was outside fighting with a defective high pressure washer.

Getting Savvy...

When you have a choice, buy American.
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post #10 of 119 Old 03-16-2008, 02:53 PM Thread Starter
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Okay. Since my new thermostat did not come with a hole....... I have to ask.....do I need to do this job all over? I could wipe off the RTV while I'm at it.....

Patriot Blue 2001 TJ
Everything I need to fix on the heep: ABS indicator, speed 4 on the blower fan, torn softop over driver's head, both seat release/tilt cables, missing center cap on spare, broken under hood light, wire up the CB, wiring problem with the reverse lights, broken bottle jack, leaky front and rear pinion seals, loose trackbar relocation bracket, torn drivers seat on the side, broken center console lock, lost nuts for door hinges, squeaking centering ball, loose parking brake cable, oil change and rotate the tires.
My build threadhttp://www.jeepforum.com/forum/showthread.php?t=528892
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post #11 of 119 Old 03-16-2008, 03:01 PM
Jerry Bransford
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No need to undo it just because of the RTV, it should be fine as is.

Getting Savvy...

When you have a choice, buy American.
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post #12 of 119 Old 06-08-2008, 05:46 PM
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I love the search function on this site. I've found almost all the answers I've needed without having to start another thread. Thanks, guys. Ya'll are the best.
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post #13 of 119 Old 11-09-2009, 05:58 PM
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Thanks for a great write up - just did mine today
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post #14 of 119 Old 11-09-2009, 07:22 PM
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I also do not use or find rtv necessary. However, this is a good write up. I'm sure many people will find it useful.

To Veterans past and present, thank you for your service!
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post #15 of 119 Old 11-09-2009, 07:47 PM Thread Starter
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Thanks guys. I feel all warm and fuzzy.
Nevermind, it's just my blanket.

Patriot Blue 2001 TJ
Everything I need to fix on the heep: ABS indicator, speed 4 on the blower fan, torn softop over driver's head, both seat release/tilt cables, missing center cap on spare, broken under hood light, wire up the CB, wiring problem with the reverse lights, broken bottle jack, leaky front and rear pinion seals, loose trackbar relocation bracket, torn drivers seat on the side, broken center console lock, lost nuts for door hinges, squeaking centering ball, loose parking brake cable, oil change and rotate the tires.
My build threadhttp://www.jeepforum.com/forum/showthread.php?t=528892
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