Question about 2002 Jeep Liberty

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2003 3.7L Liberty Jeep overheated - no leaks in

2003 3.7L Liberty Jeep, 130,xxx miles - this is my first ever problem with my Jeep - overheated, refilled radiator reservior with mix and drove home keeping temp gauge in check, with two stops to allow engine to cool - no leaks in hoses noted- what can cause brass thermostat to go bad?

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Thermostats are fairly reliable considering how cheap and simple they are.
They can and do sometimes fail (nothing is perfect). the cause is pretty much that they just stop working, usually because the internal movable part jams.
I believe a company called robertshaw makes what they claim is a "lifetime" thermostat...I doubt if it actually will last that long but may be a slightly better unit to use as a replacement.
I would use the opportunity to check the fan(s) to make sure they are working properly, that the radiator is not externally or internally obstructed and to replace your coolant.
if the overheat condition persists, check (or have checked) to make sure that there are no hydrocarbons in the radiator (indicates a cylinder head gasket leak) If your gasket has failed, it needs immediate service or it will cause serious secondary damage to the engine.

Posted on Apr 30, 2010

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Posted on Jan 02, 2017

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