WallyP

With the engine hot, open the hood, reach in and rev the engine to about 3000 RPM - there should be a very noticeable blast of air from the belt-driven fan after a five-second or so delay. The noise level should also increase.

While this condition is most often air flow related, it can also be caused by a water pump that doesn't move enough coolant at idle speeds. Let the engine idle long enough to get pretty hot (approx 210-220 deg F), then spray a fine mist of water on the radiator. If the temp drops very quickly to 180 or so, the problem is air flow. If the temp drops only a little and drops slowly, suspect coolant flow.

If you have one of the non-contact IR thermal guns, you can check for even temps across the radiator - just stay out of the belts and fans!

EdSanders

Wally,
I think you are pulling out auwl the stops now! I like the rapid rad cooling concept in checking for water pump flow.

Thanks,
ED

EdSanders

I want to thank all for your comments and insights. My mother has just passed away Thursday the 4th so I will be putting on hold any wrenching for a week or so. When the overheating gremlin is pinpointed I will post my results and awards will be issued.

Blessings,
ED

peanut

I'm very sorry to hear that Ed.I'm sure I'm speaking for everybody in offering you and your family our sincere condolances and best wishes.
Look forward to hearing from you soon

EdSanders

Peanut,
Thank you for your condolences. They will be shared.

Ed

Mrmerlin

Sorry to hear of your loss,my condolences .
God bless you and your family.

EdSanders

Merlin,
Thank you for your thoughts. She was a faith believer, so all is well..John 3:16.

Ed

WallyP

Ed,

928 problems are way, way down the list in importance. I'm sorry to hear about your Mom - I still miss mine almost constantly after 19 years...

My condolences and best wishes to your and your family.

Wally

mickster

Blessed is the just G-d. May her memory be for a blessing always.