Heat only when Accelerating and Loud roar from fan

[sooner_luvr]

2006 Explorer XLT

1. I am hearing the fan roar loudly at times when accelerating.

2. I only getting heat when revving or driving, not while idle.

Yes, I have a small leak in the radiator, but it is full of coolant. I have added coolant periodically before, but it has been a long time and I should have had to add more by now.

Water pump? Any ideas?

Thanks

 

[NoFear95]

#2 is classic for a clogged heater core. Under load the waterpump is applying more pressure and it pushes through the clog. The bypass is being used while under Idle.

#1 Are you talking about the cooling fan on under the hood or the blower motor? Leaks in the raditor are common on these. What is the milage?

 

[sooner_luvr]

Yes, the fan under the hood. It has about 85k miles.

I am on my 2nd radiator and it does have a very small leak again, but it is not low on coolant.

 

[jaydez]

The loud fan might be a bad fan clutch. Let the engine cool down all the way (like first thing in the morning) and try spinning the fan with the engine off. If there is a lot of resistance then the clutch is bad and need to be replaced.