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  #1  
Old 06-13-2012, 11:17 AM
compu_85's Avatar
Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,166
Fan clutch on all the time suddenly?

After picking my car up from the repair shop (2nd turbo replacement...) I noticed the fan clutch seems to be locked on all the time now I think it still limits the speed of the fan but as soon as you start the engine the fan roars.

Considering I just replaced the clutch & fan @ $300 about 10,000 miles ago I'm not very pleased. Is there anything I can check?

-J
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1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
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  #2  
Old 06-13-2012, 11:21 AM
stcbenz83's Avatar
Mercedes Euro 240D
 
Join Date: Mar 2006
Location: Louisville, KY
Posts: 1,053
wait.. it's not suppose to be on all the time?!? i've a few used/new fan clutches laying around.. perhaps ill experiment cause i definently notice that roar (like a bus) when im taking off
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1983 Euro 240D 277K

Formers:
1995 E300 Diesel 208K
2007 VW Passat 2.0T 63K SOLD
2003 Jaguar X-type 3.0 Sport Sold 04/11 w/88K
2009 Lexus RX350 9061 miles. Sold 04/09
2008 Mitsubishi Lancer GTS:Totaled Sept.,09 @ 24,000
2003 Infiniti I35 58K Sold
1984 300 turbo diesel 222K
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  #3  
Old 06-13-2012, 11:23 AM
compu_85's Avatar
Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,166
Before it would only roar when the engine was warm, and would stop once things cooled off a bit.

-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
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  #4  
Old 06-13-2012, 11:44 AM
daw_two's Avatar
diesel enthusiast
 
Join Date: Jan 2007
Location: Germantown, TN
Posts: 5,432
opposite pain

I feel your pain in the opposite way. I'm thinking my fan clutch is just the opposite ..... never engages. I've never heard the "roar" and I had it pretty toasty under the hood once.....95 degree day with the AC on and sitting still.... you know the routine.

I just picked up a plastic fan upgrade this past weekend in the junkyard. That will be going on when I tackle the various work up front.
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daw_two
Germantown, TN

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Current Car --- 05/2012 1984 300D Light Ivory, Red interior
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& many more
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  #5  
Old 06-13-2012, 12:32 PM
Registered User
 
Join Date: Nov 2010
Location: TX
Posts: 3,254
the fan will roar on a cold startup but release in about 10 to 20 seconds, The silicone fluid leaks into the working chamber causing this.

The later OM606 fans and clutches are very slippy and hence quiet. but they do their job like the old ones.
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1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)
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  #6  
Old 06-13-2012, 01:23 PM
compu_85's Avatar
Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,166
I have the updated clutch on my car... it never seems to release.

-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
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  #7  
Old 06-13-2012, 01:30 PM
Registered User
 
Join Date: Nov 2010
Location: TX
Posts: 3,254
the fan should decouple at about 3000 to 4000 rpm, It is on all the time then its bad too, usually this is caused by too much fluid in the clutch or the metering pin is stuck open due to dirt etc.
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1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)
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  #8  
Old 09-24-2012, 10:05 PM
compu_85's Avatar
Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,166
I took the clutch off tonight... looks like the clutch oil is leaking out around the hub. I think I'll just leave it off for now and have the pusher fans run on low... it's cooled off here a lot now and doesn't get above 75*.

$300 down the tubes. I'm really annoyed at how quickly the clutch failed. I'll probably replace it with a single electric puller fan and ditch the pusher fans off of the front of the radiator.

-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house

Last edited by compu_85; 09-25-2012 at 09:31 AM.
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  #9  
Old 09-24-2012, 10:22 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 25,837
which fan blade do you have on the clutch?
which clutch did you buy for $300???
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
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  #10  
Old 09-24-2012, 10:59 PM
compu_85's Avatar
Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,166
Fanwheel A6062000023
Clutch A6062000022

The clutch for the metal fanwheel was NLA, so I replaced both.

Pelican Parts - Product Information: 606-200-00-22-M38

-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
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  #11  
Old 09-28-2012, 08:45 PM
compu_85's Avatar
Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,166
Since removing the belt fan and shroud I've noticed the car runs cooler on the highway. I connected the dual pusher fans (standard on the 91) to a thermostat, the slow speed keeps up with city driving fine.

I think airflow with the stock belt fan is not as good as it could be. There is so little room between the fan and engine the air has no place to go. With the fan gone air can flow past the engine and out the bottom of the car easier.

-J


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__________________
1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
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