|
|
|
|
| Author |
|
|
Registered
Join Date: Oct 2002
Location: Minneapolis, MN
Posts: 1,226
|
alternator issues
I had my alternator rebuilt. I assembled the fan onto the alternator and into the housing. I gave it a spin prior to putting it back onto the engine. That’s when I noticed that the fan was dragging or rubbing. So I took it apart and saw that some of the fins (see shiny and not shiny areas, top photo) were dragging on the alternator (see shiny areas, second photo). When you pull the fan away from the alternator it does not drag on the alternator.
 I realize that the fins are cast parts and not held to a tight tolerance. But, when you tighten the nut (item 11 see bottom picture below) with, belt and all other hardware, won’t that also pull the fan back onto the alternator causing it to drag? Has anyone else seen this? Should I add a shim(s) between the fan and the alternator? From the looks of the wear on the two parts it has been dragging for some time. When I spin the fan it appears to have little or no runout so I don’t suspect a bent shaft. 
__________________
Thanks, Mike When I was a kid, I didn't want a stupid pony, I wanted a PORSCHE. 1970 911T Coupe, 1979 911SC Targa Euro, 1971 Honda CT70 HK Trail 70 (the ultimate in two wheeled transportation) |
||
12-20-2006, 07:34 PM
|
|
|
Senior Member
Join Date: Jun 2000
Location: N. Phoenix AZ USA
Posts: 28,943
|
Sure that there is not a washer missing inbetween the two?
Joe
__________________
2013 Jag XF, 2002 Dodge Ram 2500 Cummins (the workhorse), 1992 Jaguar XJ S-3 V-12 VDP (one of only 100 examples made), 1969 Jaguar XJ (been in the family since new), 1985 911 Targa backdated to 1973 RS specs with a 3.6 shoehorned in the back, 1959 Austin Healey Sprite (former SCCA H-Prod), 1995 BMW R1100RSL, 1971 & '72 BMW R75/5 "Toaster," Ural Tourist w/sidecar, 1949 Aeronca Sedan / QB |
||
|
12-20-2006, 08:39 PM
|
|
|
Registered
Join Date: Feb 2004
Location: Littleton, Colorado
Posts: 366
|
I recently did my alternator (twice in two weeks) and I had a large spacer about 2 mm around the base of the shaft on the alternator before the fan went on. The shims are the thin washer like spacers, but the first on against the alternator was very thick.
__________________
1984 3.2 Cab (now toy) 1975 911S (old toy) Mercedes E350 W4 (snow car) 2007 911 Turbo (water and air pumper) 2012 Panamera 4S (for the wife, I swear) |
||
|
12-21-2006, 03:50 AM
|
|
|
Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
|
Quote:
ditto on the 3 Valeos I have. I couldn't find the Bosch to confirm that one.
__________________
Ronin LB '77 911s 2.7 PMO E 8.5 SSI Monty MSD JPI w x6 |
||
|
12-21-2006, 04:18 AM
|
|
|
Forced Induction Junkie
|
Yep, should be a spacer between the bearing on the alternator and the fan.
__________________
Dave '85 930 Factory Special Wishes Flachbau Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P |
||
|
12-21-2006, 06:37 AM
|
|
|
Registered
Join Date: Oct 2002
Location: Minneapolis, MN
Posts: 1,226
|
Quote:
__________________
Thanks, Mike When I was a kid, I didn't want a stupid pony, I wanted a PORSCHE. 1970 911T Coupe, 1979 911SC Targa Euro, 1971 Honda CT70 HK Trail 70 (the ultimate in two wheeled transportation) |
||
|
12-21-2006, 08:16 AM
|
|
|
|
Registered
Join Date: Jul 2002
Location: Southern California
Posts: 5,067
|
I'm reviving this old thread because I have the same problem. Does anyone know where I can purchase, beg, borrow or steal the elusive 2 mm spacer? I don't recall seeing it before I took the alternator in for rebuilding, but there's nothing there now.
Thanks, guys.
__________________
1984 Targa |
||
|
05-10-2009, 05:06 PM
|
|
1985 Porsche 930 Fac. Slantnose 3.3l
