2005 5.7 overheating issue
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2005 5.7 overheating issue
Hi all...longtime listener.
Original owner - 132,000 miles
Overheated suddenly about one month ago - original owner with no previous overheating issues. Suddenly went to red with dash warnings during normal driving with no load or trailer towing. No coolant leaks.
First suspect was a stuck thermostat - replaced - no change.
Step 2 - flush and refill cooling system - no change.
Step 3 - replace fan clutch - small improvement
Step 4 - replace water pump - small improvement
After all that work, during a prolonged idle in the driveway with mid 70s ambient temperature and the heater off the gauge stays about 1/3 below half on the heat gauge. Front heater blows hot air but rear heater is warm only. There is no visible leak from the auxiliary pump.
When driving in stop and go and stretches of 50 mph the temp slowly increase to 1/3 over half way on the gauge. The engine runs smooth and does not use oil.
Looking into the radiator top inlet there is no gunk or sludge and the passages that I can see - not much - look unobstructed. Any recommendations for a company that does a quality flush and vacuum refill? I'm in Temecula, CA.
Original owner - 132,000 miles
Overheated suddenly about one month ago - original owner with no previous overheating issues. Suddenly went to red with dash warnings during normal driving with no load or trailer towing. No coolant leaks.
First suspect was a stuck thermostat - replaced - no change.
Step 2 - flush and refill cooling system - no change.
Step 3 - replace fan clutch - small improvement
Step 4 - replace water pump - small improvement
After all that work, during a prolonged idle in the driveway with mid 70s ambient temperature and the heater off the gauge stays about 1/3 below half on the heat gauge. Front heater blows hot air but rear heater is warm only. There is no visible leak from the auxiliary pump.
When driving in stop and go and stretches of 50 mph the temp slowly increase to 1/3 over half way on the gauge. The engine runs smooth and does not use oil.
Looking into the radiator top inlet there is no gunk or sludge and the passages that I can see - not much - look unobstructed. Any recommendations for a company that does a quality flush and vacuum refill? I'm in Temecula, CA.
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Joined: Apr 2010
Posts: 87,535
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From: Clayton MI
Being in CA, you aren't going to find anything really effective over the counter... Best bet is to take it to a good shop, have them test for combustion gases in the coolant, and if they don't find any, have them do a full flush and fill.