ljgiles
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Posts posted by ljgiles
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So, I changed the thermostat this afternoon and before doing so had drained about a half gallon or so of fluid. After replacing the thermostat, which looked in good condition except the jiggle valve was at 3:00, I refilled and burped the system. It took more than the half gallon I drained, about 3/4 of a gallon , and the heater now works as advertised. I had tried the burp procedure twice already but there must have been some massive air bubble in the system to take more coolant than I drained out. Thanks for the thread.
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I am having a similar problem. I have burped the system a couple of times to no avail. The coolant level is fine and I just drove about a 1000 mile trip. My system will go cold at idle but only needs maybe 1200-1500 rpm to get warm. The heater control valve works fine and there are no leaks. I have not changed the thermostat but plan on doing so even though that seems an unlikely suspect. One curious symptom is that i can put the car in park and rev the engine and the heat will stay warm at 600 rpm until I move the car again. Could this be a ECU problem?
No Heat At Idle Air Lock
in 90 - 00 Lexus LS400
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Yes, I did put the TS in with the jiggle valve at the noon postion. Hopefully this ends the heater issue.