Tuesday, October 25, 2011

Where could a 2000 Jeep Wrangler Sport 4.0L be leaking from?

Jeep Wrangler runs hot and leaks again. Everything has been changed, the radiator, water pump, fan clutch, hoses, and the engine flushed and cleaned. No water in oil and no smoke in the exhaust, so it's not the head. Can not find the leak. The pressure tests shows nothing. I add about a cup of water a day to the radiator. It is not running hot any longer, because I keep the radiator filled with water. Where is the leak?%26quot;
Where could a 2000 Jeep Wrangler Sport 4.0L be leaking from?
Have you tried a new radiator cap? Try blocking off the heater hoses and see if it goes away. A cup a day is a very small leak. If eliminating the heater and hoses and radiator cap doesn't do it, I'd suspect a very small head gasket leak. Something that small may not be detectable in the exhaust.
Where could a 2000 Jeep Wrangler Sport 4.0L be leaking from?
I can give you a couple of suggestions;

Pressure test the cap. Sometimes this item gets overlooked and the cap is releasing the coolant in the form of steam.

Also the water pump seal could be going bad and only leaking when the pressure is high and escaping under the car while driving.

Also pressure test the entire cooling system hot and cold to see if you have an internal leak.

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