Chrysler Repair Questions? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I will be assisting you today. Have you ever performed a cyinder block test for the presence of hydrocarbons in the cooling system? There is a test kit for doing this.
Ok good. I.wonder if air is getting sucked into the system after it cools down. Any small signs of leaks anywere?
This may be a normal operating characteristic. I have seen these engines rise in temp at first start, then once yhe thermostat opens up, the temp comes down to a normal operating temperature. Do you ever see coolant get pushed out of the bottle?
Does the gauge ever get higher than 3/4 the initial start?
This has to be an air in the system issue then. I think that when you open up the system (replacing the thermostat), and then refilling it and burping/bleeding the system, you are getting the air out. Then over time, this air creeps back in somehow. I bet if you don't replace anything this time and just bleed the system. It will work again until the air gets back in. You may have the tiniest leak somewhere, OR a super small head gasket leak That is not detectable by the block tester. Does that make sense?
I don't think the coolant is leaking out, but air is leaking in. I had an issue like this on a Corvette many years ago. It was a hose clamp I think. It never leaked coolant out, but when cold air got into the system.
Hmmm, maybe not a bad idea. Can't hurt!
Gotcha. Try just doing a bleed hole trick first. may help.