Originally Posted by Black_Jeepers
I'm having an interesting problem with my 01 wrangler. It's going through coolant at about 3/4 of a gallon every two weeks or so. Took it in to the shop and they have gone at it from every possible angle and can't determine where it's going. Radiator and cap hold pressure. Holds pressure still when the spark plugs have been pulled. Spark plugs show a slight greenish hue but is consistent on all 6 plugs which if it was a cracked head or bad head gasket wouldn't show on all 6. No deposit on the bleed hole in the water pump. WTF? Anybody run in to this before or have any suggestions that 8 professional mechanics haven't been able to come up with?
Neee more information:
How does the engine seem to be operating? Is it smooth and responsive? Or does it seem like it's missing and choppy?
When you are running down the road, do you have a large plume of white smoke following you? Have a buddy drive behind you around town to look and smell. If he smells something sweet and sees an excessive amount of white smoke out of the exhaust then you are burning it. Most likely a head gasket or cracked head in this case.
Have you checked your oil? Make sure it's clear and does not look like a chocolate milkshake...another sign of a craked head or bad head gasket.
If nothing above applies, then you have an external leak. Perhaps a bad hose or crack in the radiator or bad heater core.
Let us know how it turns out so we can add your solution to the thread.