Anyone ever solder a fan clutch so it spins at engine speed all the time?

Tried that but glad it did not work.They can blow up at high rpms.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Did it ever occur to you that there's a reason they didn't come that way from the factory?

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Current cars:
2000 ML55 AMG, 174k miles
2003 C240 T-Modell, 202k miles
1995 S320, 207k Miles

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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AJ

1985 300D (SOLD)

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.

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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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

correct me if im wrong but the solid mount fans have metal blades right?

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1981 300SD 512k OM603

They were on my 240D but the 4 blades were smaller in length and width

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.

So do some of the clutched fans.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

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?

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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-diesel is not just a fuel, its a way of life-
'15 GLK250 Bluetec 118k - mine - (OC-123,800)
'17 Metris(VITO!) - 37k - wifes (OC-41k)
'09 Sprinter 3500 Winnebago View - 62k (OC - 67k)
'13 ML350 Bluetec - 95k - dad's (OC-98k)
'01 SL500 - 103k(km) - dad's (OC-110,000km)
'16 E400 4matic Sedan - 148k - Brothers (OC-155k)

Get a 98-99 E300 clutch and 11-blade plastic fan.

Sixto
87 300D

That depends on if he has a car that can use it.

Oops. I remembered his username from a 92 SD thread.

Sixto
87 300D