Over heating
Chevrolet Silverado 1500 2003 5.3 200000 miles
changed thermostat and water pump no change at all and no obvious water leaks
1 reply
MI
Check your evap line from the fuel tank thru a solenoid valve and filter under left side of cab and then up into the top of the intake manifold. If it is cut or open to the atmosphere it will constantly pull fresh air into the manifold and cause air/fuel mixture to run lean and cause the engine to run hot. Had this problem on my 2003 5.3. Replacing that leaking line instantly cleared up the constant over heating.
Vote helpfulRelated problems
Transmission is over heated.
Silverado 1500 2013 5.3I do have a leak from the heater hose and been putting water in the reservoir
Thermostat in wrong location
Silverado 1500 2005 5.3The coolant temperature opens and closes the thermostat. In this case the thermostat is on the lower suction hose between the engine and radiator. So the cold water in the radiator cools the thermosta…
Solved
1 replyThe heat/A/C controls
Silverado 1500 2001 5.3 V8The controls do not change the vent zones. It stays in dashboard vents, will not change to defrost, feet, or blend. I have changed both of the control motors for the blend and vent zones and the contr…
1 replyOver heating
F-150 2001 5.4 TritonRunning hot ! No leaks! Air not on. Heat not on. New water pump. New thermostat! Still over heat! Y???
1 replyEngne Heats Up
March 1996 Hatch Back auto-transmissionWater is leaking somewhere under the engine
Over heating
Montero 1999 Mitsubishi Over heating and water line
Find what you needed?
Thank you!
