![]() |
|
|
|
Registered
Join Date: Apr 2009
Posts: 49
|
undoing the nut on a fan
I have a fan, loose
how can I hold it still to undo the nut, I don't want to jam something in the fan blades incase I damage another fan blade, one is already damaged ![]() ![]() I've held it down with someone else with a wrench trying to undo it, this far is too tight |
||
![]() |
|
Registered
Join Date: Oct 2005
Location: Capistrano Beach, Ca.
Posts: 7,235
|
Quote:
![]() Edit: sorry, I just saw your last line under the photo where you mentioned you held the pulley with a wrench. You may try to use an impact wrench and be certain you are turning the nut counter-clockwise--carefully!
__________________
L.J. Recovering Porsche-holic Gave up trying to stay clean Stabilized on a Pelican I.V. drip Last edited by ossiblue; 08-01-2009 at 08:19 AM.. |
||
![]() |
|
Registered
Join Date: Apr 2009
Posts: 49
|
I was hoping to avoid using an impact wrench, incase it gets away, I don't want to risk damaging the tool or the pully
I think I might cut the nut off, that'll save everything else unless there's something else I could try |
||
![]() |
|
Registered
Join Date: Jan 2006
Location: Santa Barbara, CA
Posts: 2,307
|
Get the tool and do it right. You'll need it again.
__________________
jhtaylor santa barbara 74 911 coupe. 2.7 motor by Schneider Auto Santa Barbara. Case blueprinted, shuffle-pinned, boat-tailed by Competition Engineering. Elgin mod-S cams. J&E 9.5's. PMO's. 73 Targa (gone but not forgotten) |
||
![]() |
|
Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,516
|
Thats a Motorola alternator and there is other problems. All 12 of the small holes are suposed to line up with the holes on the fan. Yours dont.
Youre probably missing the key in the slot to hold the fan to the shaft. It either backed up when you installed the fan or wasnt there when the fan was installed. Youre going to have a hard time saving the fan because it has been running on the shaft eating the shaft or the fan metal or both. Hold the fan, impact the nut off but I think you ll find the key is not on location Bruce |
||
![]() |
|
Registered
Join Date: Apr 2009
Posts: 49
|
I have the tool, I don't want to risk trashing it and the pully with the impact wrench
Quote:
I recently bought the fan I've done nothing with it yet appart from trying to take it appart I do have 2 other outer rings and an alternator, if the alternator is toast, but not another fan ![]() |
||
![]() |
|
![]() |
Registered
Join Date: Jul 2003
Location: Valencia Pa.
Posts: 8,860
|
You wont hurt it with the impact gun, just carefully hold the fan still with your hands, be super careful , not to put your fingers in the blades, the fan will try to turn a little, a couple of quick blasts with the gun, and the nut will be off. The impact gun is your friend, you will do far more damage trying to cut the nut off .
__________________
No left turn un stoned |
||
![]() |
|
Registered
Join Date: Apr 2009
Posts: 49
|
Quote:
will give it a go then |
||
![]() |
|
Ferdinand Magazine
|
Quote:
![]() You may find you have a similar prob to me: pulley outer cutting into shaft as not fitted correctly. I fixed mine with some JB: all works a treat now, though I have a little fan and alternator to fit sometime. ![]() ![]() ![]() ![]()
__________________
Sheriff at www.impactbumpers.com Brand support at classicretrofit.com/tuthillporsche.com 1976 Porsche 911 Carrera 3.0: 'The Orange' - 1981 924 Turbo - 1983 944 Lux - Too many BMW motorcycles |
||
![]() |
|
Registered
Join Date: Apr 2009
Posts: 49
|
Quote:
I'm at the bottom end of the scale, I'm a VW man ![]() I'm trying to put to gether a 2 + ltr 914 motor with a 911 cooling system ![]() this one is VW type 1 based to go in this ![]() |
||
![]() |
|
Registered
Join Date: May 2002
Location: Portland, Oregon
Posts: 12,667
|
Cool project.
When you get the alternator apart, count the shims, you should have 6. If you are short, that is also part of the problem.
__________________
Harry 1970 VW Sunroof Bus - "The Magic Bus" 1971 Jaguar XKE 2+2 V12 Coupe - {insert name here} 1973.5 911T Targa - "Smokey" 2020 MB E350 4Matic |
||
![]() |
|
Registered
Join Date: Jun 2009
Location: Manhattan Beach, California. Factory Delivery-Original owner-Retired engineer
Posts: 5,238
|
Since you have the fan off the car, any mechanic can help you with this task
especially if you have the right tool (the pulley fan wrench). If not johndglynn's approach is the best. IMPORTANT: Count/record the shims between the pulley halves and under the cup. The shims under the cup nut are visible in your pics. There should be a total of 6. All 6 must be replaced in the same location to accomodate belt tension. On our 3.2 I used two shims between the pulley halves, and four under the cup nut. I've done this several times on our '86. Please check my post dated July 18, 2009 on this subject. There is a breakout diagram showing all of the fan parts. And as per John' post, take your time. Get someone to help you. Good luck, Gerry Last edited by 86 911 Targa; 08-08-2009 at 01:56 PM.. |
||
![]() |
|
Registered
Join Date: Jan 2009
Location: Melbourne, FL
Posts: 4
|
johndglynn,
I was looking at the pictures and noticed that your fan hub had significant damage from the half pulley. I just noticed similar damage on mine (1988 3.2L Carrera engine), do you know why this occurs? |
||
![]() |
|
Spiderman
|
The key wasn't on right and the shims weren't installed correctly. I found this exact same damage on my 87 carrera after purchase. A carefull repair with JB Weld, a little filing to get things nice and smooth, carefull reassembly and everything works great now. Runs true, shouldn't be much heat here so the JB will be fine in my opinion. $2.00 repair plus my time.
|
||
![]() |
|
Registered
Join Date: May 2004
Location: Boulder, Colorado
Posts: 7,275
|
LeGino
That groving of the hub happens when the outer pulley half isn't tight against the inner. This usually happens because there aren't enough of the washer shims installed on the outside of the outer pulley. When there aren't enough total shims, the cup washer (right below the nut) bottoms on the fat end of the hub. It can do this before it puts enough pressure on the outer pulley. For that matter, the cup washer can get distorted from overtorquing, losing some of its effective depth. Pretty common issue. Also fairly easily avoided. I've seen the groove go all the way around the hub, making a JB weld fix kind of iffey. Took me a long time to realize why all authorities insisted on using the whole shim stack. Which can be a pain, because the outer shims want to fall off of the hub or otherwise get out of line while you are trying to tighten the nut and nudge the belt into place at the same time. So obviously it is tempting to try a shortcut until you realize how this works. |
||
![]() |
|
Registered
Join Date: Jan 2009
Location: Melbourne, FL
Posts: 4
|
Thanks guys, this make sense, since I had installed a new belt and had to shim under the pulley for the first time. I torque the nut to spec every time, but i didn't pay enough attention of the thread run, obviously.
|
||
![]() |
|