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  #1  
Old 07-24-2009, 10:54 AM
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OM602 Fan, Plastic or Metal, Which is best?

So I'm getting ready to replace my fan clutch and have located one that will work on my OEM metal fan. Is there any significant performance advantage to making the change to the plastic fan/clutch combo on my 2.5L turbo?

Keeping the metal fan is the less costly way to go of course.

Thanks.
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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

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  #2  
Old 07-24-2009, 12:28 PM
Fukkenwagen
 
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my personal opinion on this issue:

metal fans extend a greater mass away from the axis of rotation allowing a much greater risk of being unbalanced. Logically, this imbalance should pose threats to whatever bearing surfaces are along this axis.
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  #3  
Old 07-24-2009, 12:35 PM
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That was a very smart answer! But is it worth another $150?
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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

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  #4  
Old 07-24-2009, 12:40 PM
Fukkenwagen
 
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thats funny...

its the one question I don't have an opinion on.
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  #5  
Old 07-24-2009, 12:49 PM
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This is the clutch I was looking to buy. Anyone order from these folks before?

Importec
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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

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  #6  
Old 07-24-2009, 12:56 PM
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Quote:
Originally Posted by jt20 View Post
my personal opinion on this issue:

metal fans extend a greater mass away from the axis of rotation allowing a much greater risk of being unbalanced. Logically, this imbalance should pose threats to whatever bearing surfaces are along this axis.
This is like Ben Bernanke speaks. Say something as if nothing is spoken. I do not know whether I understand. Air flow depends on the diameter of the fan, speed of rotation. The pitch may make a difference but I am not a scientist. Personally, I think they should be compatible and I would evaluate it on price. My 2 cents.
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Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

2 x 87 300SDL
1 x 87 300D
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.
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  #7  
Old 07-24-2009, 01:11 PM
Fukkenwagen
 
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Quote:
Originally Posted by Oldwolf View Post
That was a very smart answer! But is it worth another $150?

you meant the difference in the 2 clutches is $150?...

or buying a new fan is $150?....
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  #8  
Old 07-24-2009, 01:17 PM
Fukkenwagen
 
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Quote:
Originally Posted by ah-kay View Post
This is like Ben Bernanke speaks. Say something as if nothing is spoken. I do not know whether I understand. Air flow depends on the diameter of the fan, speed of rotation. The pitch may make a difference but I am not a scientist. Personally, I think they should be compatible and I would evaluate it on price. My 2 cents.

punch a hole in a penny that is surrounded by plastic. Spin it @ 3000 rpm on a needle as its axis.

punch a hole in a sewer grate and spin it @ 3000 rpm on a needle as its axis.


which one needs to be more precisely balanced so that it doesn't destroy the needle? Which one has the greater chance of being unbalanced?

Bernanke, huh?
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Last edited by jt20; 07-24-2009 at 01:35 PM. Reason: plastic penny
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  #9  
Old 07-24-2009, 01:18 PM
Fukkenwagen
 
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Quote:
Originally Posted by Oldwolf View Post
That was a very smart answer! But is it worth another $150?

no, you will never see me spend $150 if I don't have to.
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  #10  
Old 07-24-2009, 01:41 PM
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No, I mean I can get a clutch shipped for $110 from Importec and the clutch and fan for $160 from Peach (Sachs) and $300 from AutoHauz (Fichtel-Sachs). I don't quite understand the price discrepancies yet.
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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

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  #11  
Old 07-24-2009, 02:14 PM
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Honestly, I really do not understand the explanation, it is beyond me. My understanding is that clutch itself is metal, the fan can be plastic or metal. As for myself, I always pull one from Junk Yard for $15 or less, does not matter whether it is made of metal or plastic and pay with Plastic.
__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

2 x 87 300SDL
1 x 87 300D
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.
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  #12  
Old 07-24-2009, 02:23 PM
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The guy at Importec still has seven of these in stock.

He was telling me that the original MB part (Behr) actually comes from a plant in China.

In fact, most all the fan clutches you buy are from China these days so he says.

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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

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  #13  
Old 07-24-2009, 02:25 PM
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Quote:
Originally Posted by ah-kay View Post
Honestly, I really do not understand the explanation, it is beyond me. My understanding is that clutch itself is metal, the fan can be plastic or metal. .
Do you mean my explanation or jt20's?


Quote:
Originally Posted by ah-kay View Post
As for myself, I always pull one from Junk Yard for $15 or less, does not matter whether it is made of metal or plastic and pay with Plastic.
HaHa.
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2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L

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  #14  
Old 07-24-2009, 02:27 PM
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Since they are all from China I see Advance has them for $121! Probably though there is good ChiCom and bad ChiCom clutches.
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1993 W124 300D 2.5L Turbo, OM602.962
2000 Chevrolet Cavalier, 2.4L DOHC
2002 Ford Explorer, 4.0L SOHC
2005 Toyota Prius, 1.5L


Last edited by Oldwolf; 07-24-2009 at 02:36 PM.
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  #15  
Old 07-24-2009, 02:34 PM
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Read your POTENTIAL supplier's description

"Importec's" description LIMITS you to a Metallic Blade with their clutch.

You will have a PM in about "Ten".
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Last edited by compress ignite; 07-24-2009 at 02:47 PM.
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Old 07-24-2009, 02:34 PM
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