Leaking vast quantities of coolant

JEEPGIRL94

MEMBER
1993 JEEP GRAND CHEROKEE
4.0L
6 CYL
4WD
AUTOMATIC
227,000 MILES

Coming from where my fan attaches to my engine. Car is not overheating but on my dash just above my ashtray I have a "command center" notifying me of any warnings I need to be aware of. It says coolant sensor bad. Which is what caused the overheating the first time. We changed both coolant sensor and thermostat. Now after a drive all the leaks are coming out of radiator, but my overflow tank stays full. Any ideas?

5 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

A coolant pressure test will show up any external coolant leaks, from what you say it sounds as if the water pump seal may be leaking, if you are checking the coolant with the engine hot, the coolant will have expanded and it will appear that the level is correct, check it cold and the level will be lower, eventually the hot level will start to drop and the cold level will be very low.

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Wednesday, October 25th, 2017 AT 4:13 PM

JEEPGIRL94

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3 POSTS

Can I rig the weep hole so that it does not leak anymore?

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Thursday, October 26th, 2017 AT 5:13 AM

MHPAUTOS

MECHANIC
31,937 POSTS

No you cannot do that, it just will not work, you need to replace the pump.

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Thursday, October 26th, 2017 AT 5:00 PM

JEEPGIRL94

MEMBER
3 POSTS

Okay so hear this one. We put stop leak in my system. It stopped leaking for a couple days. Then my thermostat got stuck open, so my engine was running cold. Today it started leaking again and I noticed my thermostat was reading again cause my gauge was normal instead of reading 110°. Well shortly later I was back at 110°. Is that even possible?

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Tuesday, October 31st, 2017 AT 11:02 PM

MHPAUTOS

MECHANIC
31,937 POSTS

Stop leak is not a good idea, it can block radiators and cause over heating, get the water pump replaced and get the thermostat replaced and radiator cleaned to remove all that stop leak muck.