losing coolant
#1
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Model: Cherokee
losing coolant
As some of you have seen, I've been diagnosing a coolant leak under my jeep for a little while now. I think I've made a breakthrough ... well sort of.
I see that the coolant is coming out of the coolant reservoir overflow. It comes out as soon as I shut my engine off. A small puddle of coolant will form on the ground (about two cups or so) before it stops.
Also this only happens when it's really hot outside.
This can't be normal right? What's up with this?
I see that the coolant is coming out of the coolant reservoir overflow. It comes out as soon as I shut my engine off. A small puddle of coolant will form on the ground (about two cups or so) before it stops.
Also this only happens when it's really hot outside.
This can't be normal right? What's up with this?
#3
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The reservoir is filled between the two marks. The radiator cap was replaced about a year ago. Could it of gone bad already?
I had no issues untill it started getting warm outside. It did the same thing last summer.
I had no issues untill it started getting warm outside. It did the same thing last summer.
#5
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Year: 1993
Model: Cherokee
Engine: 4.0L
You're saying that when you turn the engine off, the overflow reservoir bottle fills completely and overflows a couple of cups? When it cools does it suck some of the coolant back into the radiator?
Caps are cheap -- I guess I would try another 16# cap as a first step and also make sure the surface where the cap valve seats in the filler neck is not damaged.
Caps are cheap -- I guess I would try another 16# cap as a first step and also make sure the surface where the cap valve seats in the filler neck is not damaged.
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Yes and Yes Pelican
Also I would like to add that I haven't heard the radiator fan go on full blast for a long time. It's on the slow speed all the time. Could this be alowing the coolant to get to hot?
Also I would like to add that I haven't heard the radiator fan go on full blast for a long time. It's on the slow speed all the time. Could this be alowing the coolant to get to hot?
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#8
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Coolant shouldn't boil until your temp gauge is pegged if the cap is operating properly. What's your temp gauge reading?
But yeah, check the fan clutch and fuse/wiring for the E-fan.
But yeah, check the fan clutch and fuse/wiring for the E-fan.
#11
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yep I got 50/50 in there. I think I will get it pressure tested if a new radiator cap, and fixed electric fan don't work.
Last edited by 95ck; 06-03-2013 at 12:12 AM. Reason: fix
#12
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Year: 1998
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Engine: 4.0
Hopefully it isn't your head...if the head gasket has a slight leak, it can allow combustion gases into the cooling system, which would cause enough pressure to blow coolant out of your overflow tank. Happened on my old Ranger.
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