I'm trying to change my serpentine belt. The repair manual calls for some special tool that gets inserted behind the fan pulley. What tool or device that I might have around the house, can I use in place of the "special tool"?

Thanks,

Jeff

1991 300d

Jeff, I got your PM and posted some info on the "special" tool over here:

R&R of Viscous Coupled Fan, Serpentine Belt Replacement W210 E300D

Do you have anybody neaby that could counter-hold the water pump pulley while you remove the bolt? Heavy gloves would help to grip the pulley while you apply torque.

Would a large common nail work? Might be worth a try.

Thanks for the info. I tried an allen wrench, but it just goes in and doesn't seem to "lock in", or do anything. Is the tool supposed to have a feel that it's locked into place or something?

Thanks,

Jeff

1991 300d

just losen the belt. stick it through a pipe.
this will clamp down on the pulley tight enough to
loosen the bolt. kinda like the belt gripper that sears
was always advertising.

george

Jeff, the locking tool just jams against the ridge on the water pump housing...not terribly elegant but it works.

__________________
1998 W210 diesel (wiped out by a texter)
Baum spring compressor "for rent"

The Sears belt wrench is also a Harbor Freight belt wrench - very inexpensive and works very well, for this a number of other jobs.

If you have an old serpentine belt, cut a piece long enough to go around the pulley plus a couple of inches to clamp with vice grips. Works really good.

One time I bent a 10-d (10-penny) nail and used that. The latest time I needed to use this tool, I was changing the water pump on my 89 W124.

I ended up going to a hardware store, buying a 36-inch long piece of steel stock (round), cutting it off with a Dremel tool and then bending it so that it fit the groove and went into the hole in the pulley. I spent too much time messing around trying to "make something work". Then I ponied up the $4 for the steel rod and in a matter of minutes, had it done.

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Jay Yambrovich
Scotts Valley, CA.

1993 300 CE Cabriolet (A124) 131K miles
1997 C-280 133K miles

2000 BMW R1100RT 69K miles
1989 300 E 216K miles (sold)

Jeff - I know of some people who have taken an old small screwdriver (phillips) and simply bent the tip at a 45 degree angle with a vice - as for me, I went to the hardware store, got a small section of 1/8" or smaller metal rod, cut off all but 8 inches and bent the end at about 45 degrees with about 3/4 inch.

If your 300D has a fan clutch like my 300E I finally learned that the dealers have a nice small hex socket that is a lot easier to fit into the bolt of the fan assembly - think that is 8mm? Anyway giving you more information than you need...

Bill

Install an electric fan.

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.

I use an old piece of bicycle tire (cut away from the wire bead) wrap it around the pulley, and hold it with a locking chain wrench I got from Harbor Freight ( http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=36813 ) - then the fan/fanclutch bolt comes off with breaker bar.

__________________
327K on 1986 W201, 602.911, 722.414 2.5 190D ("The Red Baron")
139K on 1993 W124, 104.942, 722.433 2.8 300E ("Queen")

http://farm5.static.flickr.com/4081/...0bb92d3c_m.jpg http://i370.photobucket.com/albums/o...g?t=1325284354

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.
- Albert Einstein

take a walk down memory lane...

I replaced the belt on my M103 without taking off the fan....its an art form. I just loosen and re-tighten the tensioner, that's it. There's a big enough gap between the fan and pulley to get the belt in and out.

__________________
-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)

i just use an air compressor and air tools. no locking required

Where is this hole that you guys are talking about. What about the tensioner, shouldn't it be used when changing the serpentine belt.

1991 300D 2.5

__________________
1995 E420 152k
1991 300D 2.5 348116 daily driver
1992 300E 2.6 196k-work in progress(head gasket)
2002 BMW 745Li 93k

There is no hole in the OEM water pump flange on 601/602/603 engines!