Q: overheating at idle with new clutch fan

asked by on

When driving at any speed, runs normal temp. Begins to heat up at idle. This shows thermostat is good. Radiator is 1 year old and runs 50/50 mix. Replaced clutch fan today. See no white in oil or dark in antifreeze. Seems no head gasket due to this. Thinking temp sensor ok due to dash reading normal when driving and reading high at idle. Possible radiator cap? By the way, I find no leaks. And I have good air flow now thru radiator due to new fan clutch. I'm stumped!!!

My car has 223000 miles.
My car has an automatic transmission.

Inspect and verify that there is no plastic bag/trash on front of condenser or up between the radiator and condenser. Plastic ductwork around the fan are all present and intact. You should also consider whether the fan clutch an OEM or aftermarket part.

With the engine fully warmed up/hot, shut it off and attempt to turn the fan by hand. You should feel significant resistance if the fan clutch is providing a proper viscous connection.

Verify actual temps using an infrared non-contact temp gun at the thermostat housing. Pressure test the cooling system and cap to verify no leaks, external or internal. The levels in radiator and overflow tank should be stable, staying the same, and requiring no addition of fluid. Does that water pump also have 223,000 miles? Replace that radiator cap for cheap insurance - as those can wear out after time. If you need help having this looked at, a technician from YourMechanic can come to your home or office to diagnose your overheating issue and make the correct repairs.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. overheating at idle with new clutch fan

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Overheating problems - 1985 Jeep CJ7

It sounds like you still have a blown head gasket or minute crack in the cylinder head or block, both of which can cause overheating. You mention that you "repaired the head," but don't identify what was done. I would...

Q: Engine timing

Hi Kaiesha. Thanks for contacting us today. At first glance, I would disagree with both of those opinions. Typically, the rotten egg smell is an indication of a clogged or worn out catalytic converter. This could also be the source...

Q: Car idles and stalls; scan shows P0137

This engine has had many technical bulletins for stalling or idling rough and most called for the engine control module (ECM) to be reprogrammed. I recommend having the engine scanned to check for any codes, the engine checked for...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...