I filled my coolant resevoir & within 45 minutes it was empty. Temp started to rise. I can't pinpoint where there may b a leak. Could it be thermostat or wateump possibly???

Asked by Jul 29, 2015 at 07:36 PM about the 1998 Jeep Grand Cherokee Limited 4WD

Question type: Maintenance & Repair

Jeep runs great. Coolant level low has been showing on Vic and when I fill
resevoir it drains within a day.found small puddle on ground, but this was
after resevoir was drained. I need suggestion on what it may be.

2 Answers

20,430

First you need to pinpoint where the leak is coming from before can give you a diagnosis of your problem.

145

You don't mention if the coolant loss is while the vehicle sits or is driven. If the loss is occurring while driving, there are two possible causes: 1) Intake manifold is cracked or the gasket leaks. 2) A vacuum control valve has failed and the engine is sucking the coolant into the carburetor or intake manifold.

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