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#1
11-25-2005, 06:08 PM
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Monovalve repair completed in 4 minutes!
Last night the heat cut out while returning from Thanksgiving dinner with the family - quite a cold night as well. Later last evening I researched the problem and felt confident it was a monovalve failure - specifically the diaphram. I printed out some instructions. It seemed easy enough. This morning I called around and finally found one locally (an original Bosch) that was not at an MB dealer (which wanted $100 plus taxes and another dealer said I had to replace the entire valve for $330!). Once I finally picked up the rebuild kit and got to the task it took me only 4 minutes to remove the old one and replace it. Sure enough it was a split diaphram.
Absent this forum I would have spent countless hours searching for problem our in the cold and possibly even paid someone else to fix the problem - God forbid.
__________________
http://i284.photobucket.com/albums/l...aman/Fleet.jpg Peach Parts W124.128 User Group. 80 280SL 85 300SD 87 300TD 92 300D 2.5 Turbo 92 300TE 4Matic 
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#2
11-25-2005, 06:32 PM
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That's BS.
 Takes over four minutes to turn those four screws down, being especially careful not to drop one while starting them. It seems like they have about 20 turns to tighten them fully. Maybe you have a power screwdriver? 
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#3
11-25-2005, 06:59 PM
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Yes - power screwdriver with magnetic tip. No BS.
__________________
http://i284.photobucket.com/albums/l...aman/Fleet.jpg Peach Parts W124.128 User Group. 80 280SL 85 300SD 87 300TD 92 300D 2.5 Turbo 92 300TE 4Matic
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#5
11-26-2005, 02:08 AM
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We just removed the whole assembly from our 83....pump....monovalve.....everything.
See my "Epic" Thread for details.... I have a monovalve problem on my car though, I will be probably picking up a rebuild kit from fastlane sometime in the future and fixing it, as I am sick of cutting out heat/not enough. I want it HOT.
__________________
-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)
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#6
11-26-2005, 02:19 AM
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heat
my 83 300d only produces minimal heat and I was wondering if it is the thermostat of monovalve, coolant temp gauge never reads above 80. whatcha think? z.
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#7
11-26-2005, 10:31 AM
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Quote:
Try removing the electrical plug at the monovlve. Without power, the valve should deliver maximum heat. If it does not, the monovalve is the likely culprit.
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#8
11-26-2005, 09:10 PM
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Quote:
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#9
11-28-2005, 07:25 PM
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Zach,
I had the same issue. Change the t-stat and I got heat and the car runs better. Temp is now about 80-90.
__________________
83 300SD Dark Silver Dark brown inside
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#10
11-28-2005, 08:09 PM
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My SDL had that problem too, I took an even worse approach... I got used monovalve guts from the boneyard here. $10 in my misc crap pile... and a like new 603 Mann air filter.
__________________
I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]
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#11
11-28-2005, 11:09 PM
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Quote:
__________________
It is a truism that almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so. Robert A. Heinlein 09 Jetta TDI 1985 300D
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