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  #1  
Old 05-11-2009, 02:12 PM
Diesel effcient
 
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Solder a fan clutch?

Anyone ever solder a fan clutch so it spins at engine speed all the time?
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  #2  
Old 05-11-2009, 02:24 PM
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Tried that but glad it did not work.They can blow up at high rpms.
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  #3  
Old 05-11-2009, 02:34 PM
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Did it ever occur to you that there's a reason they didn't come that way from the factory?
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  #4  
Old 05-11-2009, 02:53 PM
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Quote:
Originally Posted by megadiesel View Post
Anyone ever solder a fan clutch so it spins at engine speed all the time?

That is a bad, bad idea. Don't do it!

When I bought my 300D, some moron put a bolt through the fan clutch to accomplish this exact same thing. The factory fan had so many stress cracks in it, that it could have exploded at any time. It was even broken in some places.

Luckily I caught it before it came apart. If these fans come apart, the can take out many vital and expensive components.

Do it right. Put a clutch on it.
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  #5  
Old 05-11-2009, 03:15 PM
ForcedInduction
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Originally Posted by megadiesel View Post
Anyone ever solder a fan clutch so it spins at engine speed all the time?
Yeah, great if you want to send the blades through the hood when it breaks apart!

The fan clutch is designed so the fan never goes higher than 3500rpm. If you need more airflow to improve cooling, you have a problem that needs to be fixed instead of jerry rigging something else to compensate.
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  #6  
Old 05-11-2009, 04:06 PM
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You might try replacing the clutch with a solid mount fan from a 240d.

For the record, on the MB vans with the 616 and 617 engines, the fan clutch comes with a metal tab which is designed to be bent if the clutch fails. It locks the clutch up and turns it into a direct drive fan. The manual does state a limit as to how long the engine can be driven that way. Can't remember what the limit was.
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  #7  
Old 05-11-2009, 04:57 PM
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correct me if im wrong but the solid mount fans have metal blades right?
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  #8  
Old 05-11-2009, 05:02 PM
ForcedInduction
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They were on my 240D but the 4 blades were smaller in length and width
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  #9  
Old 05-11-2009, 05:17 PM
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I actually did that once. I welded it, because the engine was getting very hot per the gauge. it was August and in South Florida with temperatures reaching 100*F

**this was only temporary so the engine wont over heat until the new part arrived.**

Didn't rev the engine much and there was a noticeable power loss.
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  #10  
Old 05-11-2009, 05:27 PM
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Originally Posted by turbobenz View Post
correct me if im wrong but the solid mount fans have metal blades right?
So do some of the clutched fans.
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1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
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  #11  
Old 05-11-2009, 05:51 PM
Diesel effcient
 
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Quote:
Originally Posted by ForcedInduction View Post
Yeah, great if you want to send the blades through the hood when it breaks apart!

The fan clutch is designed so the fan never goes higher than 3500rpm. If you need more airflow to improve cooling, you have a problem that needs to be fixed instead of jerry rigging something else to compensate.
I am working on it. I got a new rad and thermostat as well as all new rad hoses. I noticed my fan has a small crack in it. I don't want to re-install it. Can I input a diffrent fan with my new clutch?
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  #12  
Old 05-11-2009, 06:10 PM
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Originally Posted by kerry View Post
So do some of the clutched fans.
Yep, I replaced my metal one with a plastic one. The only solid mount fan I have seen is the 4 blade smaller metal one on a 616.
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  #13  
Old 05-12-2009, 12:21 AM
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Get a 98-99 E300 clutch and 11-blade plastic fan.

Sixto
87 300D
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  #14  
Old 05-12-2009, 10:09 AM
ForcedInduction
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Get a 98-99 E300 clutch and 11-blade plastic fan.
That depends on if he has a car that can use it.
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  #15  
Old 05-12-2009, 07:46 PM
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Oops. I remembered his username from a 92 SD thread.

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