Please Diagnose My Jeep

From where you are pointing the camera I am guessing that the water pump or viscous coupling is going bad allowing the cooling fan to rub against the radiator shroud. For further diagnostic with the engine turned off grasp one of the cooling fan blades and check for play.

Cheers,

Earle

Sounds and looks like the bearing on the viscous fan or the water pump is toast.

Turn the engine off, grab fan blade and see if it wobbles. If it wobbles, see if the finned center section of the fan is tight to the fan and the wobble is at the water pump.

I'm bett> I have a 1994 Jeep Grand Cherokee Laredo.

Thanks for everybody's help!

I think the video is showing a little optical illusion. The fan seems fine. There is no wobble or play whatsoever.

Gonna have to agree with RoyJ. Sounds like the fan hitting the shroud caused by a failing bearing, bent blade, or viscous fan coupling. Examine the fan shroud edges for wear spots and check the radiator for any bent fins. The fan sits very close to the radiator and if the coupling starts to go the fan can eat the radiator.

Could be a loose or tweaked motor mount too.

Earle

Still sounds like a water pump!

Things to try:

take the belt off, check to see if the adjuster seems to sp> Thanks for everybody's help!

Sometimes, but I'd expect a full out grinding if one let go, not sounds that come on after a while of running.

I do know my I6 will compla>> RoyJ wrote:

hat come on after a while of running.

grinding) when the mounts go.

Doug,

How can motor mounts cause grinding sounds? My YJ sometimes makes a sort of grinding sound on downhills, maybe it is something similar.

Thanks

that come on after a while of running.

grinding) when the mounts go.

I6.http://revbeergoggles.com/motormount/> Parts change a bit, but otherwise it's the same.>

Doug,

How can motor mounts cause grinding sounds? My YJ sometimes makes a sort of grinding sound on downhills, maybe it is something similar.

Thanks

I thought about sending you here but decided that the signal:noise ratio was too wide.

Did you inspect the fan shroud all the way around?

They can make the fan hit the shroud too. There isn't much room for error there.

Grinding sound on downhills could be the exhaust hitting the frame, a result of misaligned exhaust or again bad motor mounts.

Earle

that come on after a while of running.

of grinding) when the mounts go.

tp://revbeergoggles.com/motormount/

Thanks for the ideas. I'll resume my search for the grinding sound.

FYI,

I took the Jeep to a local shop (Chuck's Auto in L.A.). They diagnosed it as a bad water pump. Cost to replace: $400+.

Brett