TheSamba.com :: View topic

Mon Oct 12, 2009 6:00 pm

Is there a commonly known place that the fan hits or drags on, on a non doghouse shroud?
When I rev the engine at idle, I hear a high pitch squeal and it gets louder the as rpms increase.
I got out, very gently pulled the shroud back and the noise increased.

Mon Oct 12, 2009 6:05 pm

is your shroud loose? if you push it one way and the noise gets worse then you must be able to go in the other direction and the noise would stop.

Mon Oct 12, 2009 6:08 pm

Yes, thats what happens but its not really loose.

Mon Oct 12, 2009 6:14 pm

Play around with the shims between generator and the back plate. I chased this occasional rub problem around for a while and all it needed was the shims added or removed.

Mon Oct 12, 2009 6:21 pm

Where are these shims located? I havent had the shroud out in a long time.

I am going to search for a breakdown.

Thanks.

Mon Oct 12, 2009 6:22 pm

Between the fan and the mounting flange.

Mon Oct 12, 2009 6:59 pm

Cool, Thanks.

Mon Oct 12, 2009 7:04 pm

Nicksan wrote: Where are these shims located? I havent had the shroud out in a long time

if you have not remove it recently and this noise has just started then you fan may be going bad. make sure your gen/alt strap is tight. a loose strap will allow the gen/alt to shift a little cause the fan to become unaligned and rub.

Mon Oct 12, 2009 7:41 pm

Forgot to ask, what kind of shims are these?
The same that go on the alt. pulley??

Thanks for the tips.

Mon Oct 12, 2009 7:41 pm

Nicksan wrote: Forgot to ask, what kind of shims are these?
The same that go on the alt. pulley??

Thanks for the tips.
Same shims.

Mon Oct 12, 2009 8:19 pm

Thanks for the info.

:D

Tue Oct 13, 2009 5:58 am

Not trying to be a wiseass, but is the belt tight enough so it wont slip?

Fred

Wed Nov 18, 2009 6:44 pm

I'm having a similar problem, but at least have something to check after searching and finding this thread. I noticed a what sounded like a vibrating/rubbing noise when I start off in first or if I accelerate from idle while moving in a higher gear. It's at lower rpms only. I just had a mechanic remove the motor and replace the generator and fan......sigh.

I opened the lid and blipped the throttle, and there it was. Appears to be the fan rubbing against the shroud. It doesn't do it if I pull toward me on the shroud. I know the belt isn't slipping, because I'm running a cogged system and have been for years.

I'll try some of the suggestions here and see if any help.

Wed Nov 18, 2009 8:17 pm

i had a similar sitch when i replaced generators. to make sure that it wasnt rubbing i loosened the genny strap then put my foot on the generator so it moved back as far as it needed to be then tightened the strap. i then gave it a spin to check for any rubbing/scraping sounds.

like a charm.

still working on the charging system though but thats a whole other thread.