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Thermostat Problems???

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Old 05-28-2010, 11:51 AM
kf4ayw kf4ayw is offline
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Question Thermostat Problems???

I have a '98 w/5.9L and every year I have to replace the thermostat. Does anyone else have this problem? Any ideas/solutions? What is the BEST thermostat I can buy beside the crap these chain stores sell?

Thanks


Michael
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Old 05-28-2010, 12:10 PM
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I've seen that problem when the cooling system is filled with just plain water, without antifreeze. And once with antifreeze used, but the water used was from an alkali spring in the desert. Both the water pump and the radiator failed on that one within another year or so, and the scale buildup in the block was remarkable.

I've always bought my thermostats from NAPA and haven't had any problems with premature failure.
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Old 05-28-2010, 12:40 PM
ryan0714 ryan0714 is offline
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i got mine from autozone for like 10-20 bucks. 180 degree, just a regular replacement, and been good ever since.why urs stops workin is beyound me, just sounds lke something is makin it seize up after winter?
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Old 05-28-2010, 07:15 PM
dodgeboy1979 dodgeboy1979 is offline
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+1 on the NAPA thermostat, when you mix your antifreeze make sure to use distilled water and you will eliminate any of the mineral deposits from building up in your cooling system. It might not hurt to flush your cooling system with a descaler (buy this at NAPA to and follow the directions) prior to refilling the system.
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Old 05-28-2010, 07:52 PM
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get a Super-Stant. its about $15.
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Old 05-28-2010, 08:47 PM
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If your replacing your t stat every year, your problem isn't the t stat, it's merely a symptom of a bigger problem.
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Old 05-28-2010, 11:47 PM
kf4ayw kf4ayw is offline
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I agree there is something going on, but what I don't know.... Replaced the "plastic" radiator and water pump last year, have plenty of anti-freeze on-board. But this is a yearly thing.... This 'stat is a one of the Super stants.... Going to try a fail-safe next...
Will use the descaler and flush the system just to be sure....

Thanks for the feedback
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Old 05-29-2010, 09:06 AM
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How exactly is the thermostat failing?
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Old 05-29-2010, 12:47 PM
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Quote:
Originally Posted by VWandDodge View Post
How exactly is the thermostat failing?
It's not...that's the sad part. Yet it gets the blame because it's the obvious.
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Old 05-29-2010, 02:35 PM
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i would never ever use straight water in the radiator....theres a reason they make coolant....thats the way i see it...
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