Lenard Posted August 10, 2009 Posted August 10, 2009 the thermostat i put in the other day was no good, so took it out and put everything back togather without a new one,put fluid in to it ran it for awhile then checked it and the antifreeze in my res tank had about 1/2" of foam on top, is that normal? i have never seen antifreeze foam before?
jpdocdave Posted August 10, 2009 Posted August 10, 2009 could be air bubbles, it is not good to leave the thermostat out. it does need to be there for several reasons i won't get into unless you need coaxing to put a thermostat in, then by all means i will proceed :smart: :D
Automan2164 Posted August 10, 2009 Posted August 10, 2009 :agree: Running a without a thermostat will actually cause the engine to OVERHEAT. You should put one back in ASAP. Rob L.
Lenard Posted August 10, 2009 Author Posted August 10, 2009 it's going have to wait till next weedend before i can put one in, i don't see how it will overheat, please explain..
jpdocdave Posted August 10, 2009 Posted August 10, 2009 it can cause problems for a few reasons, first of all the thermostat closing keeps the coolant in the radiator longer so it can be cooled. when its open all the time or missing, under extreme conditions, the coolant doesn't spend enough time in the radiator to get cooled. also on fuel injected engines they are designed to operate at a given temperature. it is not as crucial on the renix engines, but later jeep models, and all cars for that matter will have problems without the thermostat in and working properly. i've had to replace thermostats people have put in that were colder temp stats, it has caused check engine lights, and failed emissions. if the computer sees it not reaching the desired temp it isn't happy. also post renix jeeps run at 210 for emissions reasons also, they can fail emissions if they engine doesn't reach operating temp.
Automan2164 Posted August 10, 2009 Posted August 10, 2009 Yep, what Dave said. The thermostat regulates the flow. Not enough time spent in the rad to cool off, and it'll overheat. Rob L.
Lenard Posted August 12, 2009 Author Posted August 12, 2009 they have wireless at the college!! :D ok that sounds right, i just knew on older trucks you could do this, ill be putting one in this weekend, getting it from a jeep dealership, maybe this one will last more than 2 freaking days :fs1: ive been watching my temp gauge making sure it don't get to hot, thanks guys.
Oizarod115 Posted August 13, 2009 Posted August 13, 2009 it would have to be EXTREMEE conditions for that to actually happen, or not enough airflow... generally speaking your truck will be fine until you have a chance to put on back in it... but DO put one in it Asap.
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