morrisroad

The other day I noticed an odd clanking sound coming out of the engine bay. It seems to be coming from the fan area. Drove the car around and the sound was still there.

I did a few searches here and it could either be the fan bearing or alternator is toasted. There's a ton of great posts on how to repair but not much that presents what the problem might sound like before the fix. I've added a link to a small avi file that captures the sound.

http://www.youtube.com/watch?v=TrQJZA8Rfc0

Anyone hear this sound before this kind of failure?

Thanks!

jimq

check to see if the fan is hitting the shroud.

Tom W

My car is in the shop right now because I started to hear the fan hitting the shroud. I'll know in a day or two what caused it.

morrisroad

Looked around the inner shroud and it looked ok, no rub markings. I tried moving the blades and there was some minor play there. Not sure if there should be any.

Fred's 964

Shouldn't be any play. Jimq can help with the DIY. He did a great job on his. He has pix he can share.

jimq

Morrisroad whereare you located?
We have a unwritten rule that you have to post pictures of your car before we will help you
Welcome to the fun by the way!

Hey Fred. Havent seen or heard from you in a long time. I think its getting near time to have a get together again

ValveFloat

I just finished replacing the fan and fan bearing (the whole hub actually) yesterday. Really the best way to check the fan and alternator is to remove the belts, then you can spin each separately and listen and feel the bearings. In my case it was obvious that the fan bearing was shot, as it was notchy and noisy.

Boeing 717

How hard was it to get the hub off the fan??? Mine seemed frozen to the fan when i had it out.

jimq

I bought a 3 leg puller from Harbor Freight. My fan and bearing was stuck to the alternator shaft.

Crystal Cranks

Jim, nice assortment of persuading tools in that pic, looks like they got the better of you, is that blood on the floor.

ValveFloat

Luckily I didn't have to remove the hub since I was replacing the fan as well. My old fan was coming apart.
Judging by the force necessary to put the new hub in the new (used) fan, I would say removing the hub is a job for a press, or a puller.
I searched for just the bearing, but no one seems to sell the bearing separate of the hub.

-Joe

elbeee964

jimq

I was sweating blood trying to get the darn thing apart without screwing up the altenator shaft!

Valveflot
Sunset porsche sells just the bearing. When I bought my new fan i ordered the bearing also. Turns out the fan comes with the bearing already in place so I sent it back to them. i seem to remember it was $106 for the bearing.

Boeing 717

Can you just replace the bearing while leaving the hub attached to the fan????

ValveFloat

$106 sounds right for the hub with bearing. 28 in the attached diagram is the hub. The bearing is in the hub, but there is no P/N listed.

The bearing is held in the hub by a snap ring, so if you could find a replacement bearing, I don't see why it couldn't be replaced itself, without removing the hub from the fan.
When I find some time I'll remove the old bearing and get some measurements

-Joe