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  #1  
Old 02-06-2007, 02:42 PM
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108 heater valve link

I've been searching but I can't find it, a while back I saw a link to an article on how to rebuild the heater valves on a w108 4.5 car. If someone could point me in the right direction that would be great. Thanks in advance.
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Old 02-06-2007, 10:52 PM
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I have it on paper, it was a Star article. I don't remember the electronic location.

It talked about replacing the heater levers.
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Old 02-07-2007, 02:02 AM
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Heater Valves or Heater Levers?

The heater valves on a 108 are behind the glove box as I recall. Rebuilding is fairly straightforward and self-evident once you see them.

The bolts with the cross-drilled holes that the wire to the heater levers are clamped in can be broken, so one needs to be somewhat careful with locking down the nut on the wire; don't go too far.

Rebuilding the heater control levers is a bit troublesome as it is not easy to remove or re-install the assy. Access to the two nuts that holds the bezel in and clamps the heater lever frame in is not easy, and once you get past that part, manipuating the assy out and back in with four stiff wires and cable housings attached is not the easiest job, but is definitely do-able.

You can scout it out by taking out the glove box, which is an easy task, and taking out the speaker grille and speaker and taking a look with a flashlight and mirror at the heater control assy and the cables going to the heater valves. Try to see the two nuts (one on each side) holding the heater control assy in; they're facing toward the engine.

Once you get the control assy out, rebuilding is easy. Get yourself a set of new heater levers. The one with the rheostat that controls the fan speed (the blue one) is usually a seperate item from the heater lever set and is the pricey one. What usually is the problem is broken or breaking of the rubber handles. If you're going to go to all the trouble of getting that thing out & back in, you'll want to make sure those levers are going to last a while.
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Old 02-07-2007, 11:16 PM
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what daidnik said -- it is gospel
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Old 02-09-2007, 02:03 PM
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just one more question, I got the right valve out but the left one is kind of blocked by the arm that holds the cable in place, how do I move that arm so I can get the left valve out?
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  #6  
Old 02-10-2007, 10:51 PM
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Removing Heater valve cylinders

I know the cable housing clips and the vertical metal pieces you cite. I don't recall this being a problem when I did those on my 108. You can detach the clips that hold the cable housing to those vertical pieces.

It seems like once you've done this and detached the wire from the heater valve cylinders and little steel plate, screw and lockwasher etc., that you can thread a screw into the hole in the cylinder and pull it straight out.

Is the cable housing to the right valve obstructing your removal of the left valve?

If so, detach the housing from the vertical bracket restraint. I can't recall if the clip mechanism restraining the housing is just a clip or if it has a screw holding the clip, but the clips do come off.
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Old 02-12-2007, 01:48 PM
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Yeah, I've got the cable housings detatched, but the bracket that holds the right valve cable housing is in front of the left valve by about 1/8". I could pry it out of the way but I don't want to brake anything.
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