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Showing results for tags '1500 Silverado 5.3l Flex Fuel'.
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Hello, I have a 2009 Chevy Silverado 1500 5.3l flex fuel that has 135k miles and I cannot figure out why it is over heating. I have flushed/changed the coolant, changed the spark plugs/spark plug wires, changed the thermostat/reservoir cap, changed the Mass Air Flow sensor/cleaned the k&n air filter. The radiator is about 3 years old aswell as the hoses/belt. I have tested the radiator fans by turning on the a/c and they run but seem to not want to run with out the a/c on but they both do kick on. The engine won't start to run hot unless I am in drive and in stop and go traffic, putting the truck in neutral and running the heater usually stops the heat from creeping up long enough for me to get moving again which quickly gets me right at 210. The truck has never fully over heated more than an 8th above 210 but I have had it for 11 years and it has always stayed right at 210 so I know something is not right. The passenger side wheel well is showing signs of coolant leaking but not enough for my reservoir to drop below the cold fill line. I'm thinking water pump or something to do with the radiator fans but I figured I would come here first as it's really starting to impact my wallet. The first time I noticed the temp running hot was about 3 months ago driving to los angeles from dallas, the coolant in the reservoir somehow expanded so much it filled the reservoir to the top and was leaking out of the bottom so I replaced the reservoir cap as I assumed the pressure was failing, seemed to do the trick as I had no more issues from new mexico all the way to Los Angeles. Also this is my first post so if this is in the wrong location or if I did something wrong please let me know. Thanks in advance to any suggestions.
- 6 replies
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- Engine Overheating
- 1500 Silverado 5.3l Flex Fuel
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