A few weeks ago after driving for about 75 minutes full AC in about 90 degree weather the engine temp started to rise slowly. Turned off AC and it went back now.
I did some work that weekend. I drained coolant from Radiator (not from Engine side as the bolt was stuck on good -- may be my issue?) and it was dirty coolant. I flushed with distilled water about 4 times, filled up full heat waited until Thermostat opens then let it cool and repeat. The last flush with 50% coolant in the mix then drained and finally finished with a fill of 50/50 Ford Gold. Before this last and final fill I also replaced the Ford OEM Thermostat and Ford OEM Radiator Cap just as preventive maintenance. Afterwards I followed the Burp instructions exactly which all seemed to go great. Been driving around fine for about three weeks.
Today - Driving home in a little over 90 degrees in stop and go highway traffic MAX AC, after about 35 minutes I feel the AC lose it's cold chill and immediately stare at the temp gauge. As guessed it started to climb as it did a few weeks before. I turned off AC, started to get over a few lanes of traffic and had to turn heat full blast before it got to any uncomfortable level. Took maybe two minutes by the time I was stopped on the off ramp light when it returned to normal operating. I decided to get back on the Freeway and test (stop and go traffic let up right where I got off). I turned MAX AC back on and drove around for another 25 minutes with no issue until I got home.
I'm waiting for it to cool off to check the coolant level but I'm almost sure it's fine unless I'm eating a lot of coolant somewhere. What should I be looking at now? Fans seem to kick on with no issue? Is it possible the water pump is not doing it's job? The coolant was nasty when I first drained and after total of 5 flushes it was better but not crystal clear. Any thoughts?
I did some work that weekend. I drained coolant from Radiator (not from Engine side as the bolt was stuck on good -- may be my issue?) and it was dirty coolant. I flushed with distilled water about 4 times, filled up full heat waited until Thermostat opens then let it cool and repeat. The last flush with 50% coolant in the mix then drained and finally finished with a fill of 50/50 Ford Gold. Before this last and final fill I also replaced the Ford OEM Thermostat and Ford OEM Radiator Cap just as preventive maintenance. Afterwards I followed the Burp instructions exactly which all seemed to go great. Been driving around fine for about three weeks.
Today - Driving home in a little over 90 degrees in stop and go highway traffic MAX AC, after about 35 minutes I feel the AC lose it's cold chill and immediately stare at the temp gauge. As guessed it started to climb as it did a few weeks before. I turned off AC, started to get over a few lanes of traffic and had to turn heat full blast before it got to any uncomfortable level. Took maybe two minutes by the time I was stopped on the off ramp light when it returned to normal operating. I decided to get back on the Freeway and test (stop and go traffic let up right where I got off). I turned MAX AC back on and drove around for another 25 minutes with no issue until I got home.
I'm waiting for it to cool off to check the coolant level but I'm almost sure it's fine unless I'm eating a lot of coolant somewhere. What should I be looking at now? Fans seem to kick on with no issue? Is it possible the water pump is not doing it's job? The coolant was nasty when I first drained and after total of 5 flushes it was better but not crystal clear. Any thoughts?
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