Question about 1989 Jeep Cherokee
Recovery tank boils over , new hoses, water pump, no apparant holes
Replace the radiator cap....a cap rated at 15 psi will provide an additional 40 to 50 degrees of boil over protection a faulty cap will cause the engine to boil over even with a proper mix of coolant at 220
Posted on Dec 07, 2012
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Posted on Jan 02, 2017
Hi there iask,
I could call myself ianswer. My name is Mike. I've got a 91 wrangler that used to do the same thing.
With me it was an air pocket. The temp sensor responds to a heavy medium like water, not air. As an air pocket circulates and comes into contact with the sensor, your gauge will fluctuate.
I'm sure you checked the coolant levels already, but hear me out. What I'm suggesting is like chicken soup, it can't hurt, it can only help.
Just because a radiator looks full, doesn't mean it is. Air pockets can exist in the engine and heater core. We're going to get rid of any.
Checking the coolant level.
Remember: Good things come to those who Rate.
Posted on Aug 06, 2008
It sounds like the check valve in the oil pump either has some trash in it or has gone bad. If it's a two wheel drive I don't remember the oil pan being that hard to get off. You can then drop the pickup and oil pump and soak them overnight in some parts cleaner. That may solve the problem, if there's trash in it. But if you're going to go through that much trouble, an oil pump shouldn't be that much I'd just replace it. So the problem doesn't come back. Good luck.
Posted on Jun 01, 2009
you have to install a bypass filler in the smaller hose that comes off the thermostat housing,and fill it from there first with a hose,then fill the pressure bottle and start the motor and bleed the air out.To make it easier you can pull the upper rad hose and fill it first.
Posted on Feb 06, 2009
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