Ok so i went through some deep water a few months ago, and after that the clutch fan went bad it sounded really loud like a fan noise all the time and at higher rps made a sort of high pitched grinding noise. I changed it out with a aftermarket one from advanced and it was cool for about another month. Then it started making that same noise again so i changed it again thinking i got a defect after that the sound is still there it sounds like the fan is really loud and there is a high pitch faint grinding noise at high rpms. It seems to be worse on cold start and some times goes away but some times it stays. I dont really know where to go from here anyone else have a problem like this???

 

Bump

 

Take out current 4.0, sell it, buy new 4.0

 

The mechanical fans are not worth replacing, step up to an electric.

It is impossible for us to diagnose the noises over the internet. You may need to seek help from a local source.

 

i just figured that if some one had the same problem it could point me in the right direction

 

could try taking the belt off and spinning the pullies by hand to see if they have bad bearings

 

^^^^ that's your best bet....Hard to figure out based on what you have said..Sounds like a Pulley has lost a bearing though.....Not real expensive...If you find one that has play in it, change it and go from there....

I have to ask though, you said you went into some deeper water and you fan clutch went bad? Are you saying you had it that deep and its not sealed for that kind of abuse? That will get you a F'ed up motor in a hurry...

 

I'm gonna put my money on an idler pulley or tensioner pulley. 5 bucks says if you unbolt the fan and keep the water pump pulley bolted up the noise will still be there.