Boiling 4 thermostats. - JeepForum.com

 
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post #1 of 12 Old 05-01-2013, 07:28 AM Thread Starter
car5car
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2002 M-38 
 
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Boiling 4 thermostats.

1. old one
2. NAPA
3. Advance auto
4. Advance economy.
Old one won. It opened more.
So I installed old one back.

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post #2 of 12 Old 05-01-2013, 10:01 AM
lazyWJ
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I usually roll my eyes when I read about how this particular brand of vehicle requires that particular brand (usually OEM) of part or it just won't work "right".... but your experiment is consistent with my experience with thermostats. I only buy thermostats from the dealer. I bought a "fail safe" tstat from Canadian Tire a few years ago because it was the only one they had in stock. The parts guy said "those don't work very well, you should probably order a different one in". I thought it was silly, surely it would work in my minivan. Well, it overheated within days of installing it, and the temp would nearly redline every time before it opened on the first run of the day. I promptly tossed it put in a Mopar one, and it's worked perfectly for years. For that matter, the mopar one I took out was working fine, but it looked original so decided it should be replaced while doing some other service. Go figure.

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post #3 of 12 Old 05-01-2013, 10:58 AM Thread Starter
car5car
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Chinese workers try to save wax (whatever is inside), they just put twice less, so thermostats don't open as they should.
Usually NAPA thermostats open almost twice more than Advance auto Stant.

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post #4 of 12 Old 05-01-2013, 01:35 PM
Relax_Jimmy24
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so a good thermostat is is the one that opens more? i to did a thermostat test with a new mopar one and an aftermarket one.
and the aftermarket one opened faster and opened more. the mopar opened less. so does that mean the aftermarket one is better?

both were 195F thermostats. i went ahead and installed the mopar one with a new water pump and my temperature is at about 200F
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post #5 of 12 Old 05-01-2013, 05:33 PM Thread Starter
car5car
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If you drive in Arizona and temperature 110, you want completely open thermostat.

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post #6 of 12 Old 05-01-2013, 08:29 PM
Krom
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FWIW for the test to be 100% accurate the thermostats should be suspended, not touching the bottom of the pan, and you want a thermometer in the water to see if they are working at the advertised temp
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post #7 of 12 Old 05-01-2013, 08:34 PM
MeanGreenZJ
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I really like this thread, got a good laugh out of it.
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post #8 of 12 Old 05-01-2013, 08:38 PM
MeanGreenZJ
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I don't think that any of that matters here. No opening or closing temperatures recorded. The one that opens the most is a winner here.


Quote:
Originally Posted by Krom View Post
FWIW for the test to be 100% accurate the thermostats should be suspended, not touching the bottom of the pan, and you want a thermometer in the water to see if they are working at the advertised temp
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post #9 of 12 Old 05-01-2013, 10:47 PM
99WJ539918
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I bought the cheapest one from Advance Auto and I haven't had a problem at all. The needle barely touches the halfway point at idle and while driving it stays at about 40%.
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post #10 of 12 Old 05-02-2013, 11:35 PM
Relax_Jimmy24
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i did test my thermostats again. and the aftermarket one called motor rad opens more in less time then the mopar one.
should i just go with the one that opens more then??

the mopar one was like 30 bucks. can believe a 5 dollar aftermarket thermostat is better
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post #11 of 12 Old 05-03-2013, 05:38 AM
rcwj04
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Yes go with the one that opens more.





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You forget that most members here don't own a crystal ball to tell you exactly what your problem is, specially with bad pictures that don't say/show much of anything... -Jacko84

Just a 19 year old kid with a Jeep, and broke because of it, and loving every moment.
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post #12 of 12 Old 05-03-2013, 11:35 AM Thread Starter
car5car
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I think, most cars do not block short circuit, so part of coolant goes back to block w/o going to radiator. Question is ratio of coolant going to radiator/block.
Here is double action thermostat, it closes block flow, so 100% goes to radiator.
It has 2 discs.
http://shop.advanceautoparts.com/web...023%7CL3*15971

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