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Old 11-19-2011, 04:12 PM   #1
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Thermostat

Thermostat?

My jeep has warmed up pretty quickly since I've had it. Even when it was in the 50's outside, it got up to 210 in just a few minutes and stayed there. The past few days, it doesn't even get to the first mark on the temp gauge. Thermostat stuck open?

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Old 11-19-2011, 04:17 PM   #2
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Sounds like it.

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Old 11-19-2011, 05:00 PM   #3
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At least it didn't stick closed and its a cheap fix, get a new a you won't have to worry about it for a while...Plus you might have heat for the winter.
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Old 11-19-2011, 05:15 PM   #4
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What sucks is it's a 2 hour round trip to go get a thermostat. 20 bucks worth of gas to get a 10 dollar part
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Old 11-19-2011, 07:32 PM   #5
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Clayton doesn't have any auto parts stores located closer than 2 hours?
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Old 11-19-2011, 07:37 PM   #6
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or advacned auto, auto zone, oreillys, pep boys, napa? anything? lol could order one online shipping would prob be cheaper than gas for a 2 hr drive
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Old 11-19-2011, 07:53 PM   #7
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Originally Posted by Jerry Bransford View Post
Clayton doesn't have any auto parts stores located closer than 2 hours?
We have a NAPA, but it's also a feed store. They're only open until noon on saturdays. I'll check with them monday. They can order it for me and have it in on Tuesday, I guess I'll do that. I might even luck out and they'll have one in stock. If they do, I'll be shocked.

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or advacned auto, auto zone, oreillys, pep boys, napa? anything? lol could order one online shipping would prob be cheaper than gas for a 2 hr drive
Nope, just the one Napa. It's a good place to get bulk dog food though lol.
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Old 11-19-2011, 09:12 PM   #8
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Thermostat?

My jeep has warmed up pretty quickly since I've had it. Even when it was in the 50's outside, it got up to 210 in just a few minutes and stayed there. The past few days, it doesn't even get to the first mark on the temp gauge. Thermostat stuck open?
I JUST had the same thing happen to my Jeep. I changed out the thermostat Tuesday night.

Advise... GET THE THERMOSTAT with the "vent" on the top. (it's a hole with a cup on the other side and ball bearing in it to act as a valve) Some places will sell you a generic thermostat for your Jeep. Without the "vent" it's a bitch to get all the air out of you Jeep's system. The thermostat in the Jeep is vertical instead of horizontal.

You can see it in this image. It's the hole closest to you. You can also see the "cup" on the other side. It's the brass piece opposite the hole




...


[IMG]file:///tmp/moz-screenshot.png[/IMG]
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Old 11-20-2011, 11:46 AM   #9
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Thermostats with a vent on the flange are a good way to go, they allow trapped air to vent out of the cooling system and into the top of the radiator where air bubbles won't cause problems. If what NAPA gives you doesn't have one, you can add your own by simply drilling a small hole in the flange like below.

Be sure to position the vent hole at the top when you install the thermostat.
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Old 11-20-2011, 12:20 PM   #10
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"""""What sucks is it's a 2 hour round trip to go get a thermostat. 20 bucks worth of gas to get a 10 dollar part """""

Then pay them $50 for it and feel better.
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Old 11-20-2011, 12:23 PM   #11
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"""""What sucks is it's a 2 hour round trip to go get a thermostat. 20 bucks worth of gas to get a 10 dollar part """""

Then pay them $50 for it and feel better.
I was nearly to the point of providing my Visa card to order $6 worth of aluminum brazing rods (three rods for a trial test of them) when I noticed the shipping charge was $9.99. Right. I refuse to pay more for shipping than the stupid item costs.
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Old 11-20-2011, 04:43 PM   #12
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Advise... GET THE THERMOSTAT with the "vent" on the top. (it's a hole with a cup on the other side and ball bearing in it to act as a valve) Some places will sell you a generic thermostat for your Jeep. Without the "vent" it's a bitch to get all the air out of you Jeep's system.
What is that little hole going to do for you when the thermostat housing already has a heater bypass passage the size of a dime? Just disconnect the associated heater hose and let the air out.
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Old 11-20-2011, 05:21 PM   #13
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Thanks for posting that, Jerry. I looked up the part on Napa online, but it only has a picture of a generic thermostat and doesn't state if it has the bleeder hole. I was hoping I could just drill one if it doesn't have it.
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Old 11-20-2011, 05:38 PM   #14
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I was hoping I could just drill one if it doesn't have it.
Absolutely, that's what I did for my last thermostat as well. The bleed hole at the top is more effective at removing air bubbles since bubbles float at the top and don't pass through the lower main passage in the center of the thermostat nearly as readily.
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Old 11-20-2011, 05:56 PM   #15
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I was nearly to the point of providing my Visa card to order $6 worth of aluminum brazing rods (three rods for a trial test of them) when I noticed the shipping charge was $9.99. Right. I refuse to pay more for shipping than the stupid item costs.
I'm with you, Jerry, on the shipping charges anymore. And I noticed in the paper lately that UPS is going to raise their rates 4.5%-5.5% next year starting January first. Seems a little ridiculous seeing all the UPS 2 and 3 trailer semis on the Interstates, which is bound to really cut down on their per package cost.
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Old 11-21-2011, 07:00 AM   #16
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What is that little hole going to do for you when the thermostat housing already has a heater bypass passage the size of a dime? Just disconnect the associated heater hose and let the air out.
lol - for one, it would saves you from having to disconnect a heater hose to let air out...


...
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Old 11-21-2011, 09:40 AM   #17
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lol - for one, it would saves you from having to disconnect a heater hose to let air out...


...
If you are that intimidated by a hose clamp, you probably need to steer well clear of drill presses.
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Old 11-21-2011, 11:07 AM   #18
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As expected, Napa had to order the thermostat. They had the gasket in stock, oddly enough.
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Old 11-21-2011, 11:48 AM   #19
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I'm with you, Jerry, on the shipping charges anymore. And I noticed in the paper lately that UPS is going to raise their rates 4.5%-5.5% next year starting January first. Seems a little ridiculous seeing all the UPS 2 and 3 trailer semis on the Interstates, which is bound to really cut down on their per package cost.
In Wenatchee we get at least 20-30 trains a day through town via BNSF. UPS is BNSF's biggest customer. See as many as 30 or 40 53' UPS trailers on the intermodal cars. Most efficient way to move freight long distance. Can't see how they need to raise rates? Seems like they have plenty of business since not many people send things U.S. Mail anymore.
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Old 11-22-2011, 07:29 PM   #20
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The good news: The thermostat came in today.

The bad news: I discovered one of the PO's stripped the lower thermostat housing bolt and that part of the head casting is broken off and repaired with JB weld. The bolt wasn't even finger tight and they siliconed the hell out of it to keep it from leaking. Of course it won't seal back up now, so I'm pretty much hosed until I can afford to get another head, which will be a few months.

This is not my picture, but it is exactly how mine is broken:

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Old 02-13-2012, 10:24 PM   #21
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Hate bringing up an old thread, but I finally resolved the issue. I ordered a rebuilt head from cylinder heads international and finished swapping it out today. I could have had my old head welded, but would need to remove the head to do it properly, and then there's a chance of warpage, and with the head removed, I may as well do a valve job on it. It was easier to just order a head.

As a bonus, the engine is much quieter now.

Now, if I could only get the heater to work like it should. I've flushed the core 3 times now, water runs clear and easily through it, new thermostat and it still is only lukewarm
Mine has a cable operated blend door, and the cable moves it back and forth, so I think that's ok. Any ideas?

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