It s a rotational kind of whooshing noise not rpm dependant sounds like it s coming from the front of the engine.
Ford f150 fan clutch noise.
A stuck fan clutch will cause excessive unnecessary drag on the engine which can cause a drop in power acceleration and fuel efficiency sometimes to a quite noticeable degree.
Excess fan noise at high speed is caused by the same problem a seized fan clutch.
Many ford f150s around and including the 2015 model have insanely loud cooling fan noise that begins as soon as you turn the ignition on and stops only when.
Fan spins after engine shut down might indicate a weak clutch.
In most cases fan blades are designed to flex up to 1 2 inch 1 3 cm.
Loose rattling pieces send a loud and clear message that you need to have your fan clutch replaced.
Any more than that could compromise the efficiency of the unit.
Bhurry turn your ac off and see if the fan still stays on.
Start the engine raise the hood and wait for the fan to engage.
Silicone fluid leaking from the fan clutch would cause this problem.
It should kick in once the engine reaches operating temperature and shut off after cooling the engine for a bit.
Let us know what engine size your f 150 has so that we can possibly get more information for you.
It s happened after running for about 1 2 minutes and it ll happen after driving a while as well so it s not.
If it does move to the next step.
The loud sound could come from your fan clutch for the same reason your fan stays on.
2009 2014 ford f 150 skip to main content.
I think it s the fan clutch.
I often can t hear the flowmasters at idle.
If it does not engage you have a bad fan clutch.
It doesn t look like any fluid is leaking.
Give the water pump hose a quick jostle as well to see if the problem might lie there.
My 97 4 6 truck makes noise.