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  #1  
Old 01-19-2004, 08:59 AM
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Location: Back in Colorado for now
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'79 300D Water Questions?

Looked at a guys 300D that didn't have heat the other day. Turns out, there's a funky water direction valve on the right side fender well that has a cracked housing and has bee bypassed.

So, who can tell me what this is, how it works and how I can bypass it to restore heat to the car:



and




Also, should there be a vac line connected to this alda (again, on the '79 300D)? Routing?

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1984 300D Turbo - 4-speed manual conversion, mid-level resto

1983 300D - parts car

1979 300TD Auto - Parts car.

1985 300D Auto - Wrecked/Parts.


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  #2  
Old 01-19-2004, 09:30 AM
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Big plastic box with lots of wires up top and four hoses underneath? Climate control servo -- get an aluminum one from Performance Analysis, along with the amplifier (it's dead too, and will fry the new servo if not replaced...) About $600, I think. Factory parts, if you can get them, are about twice that.

Someone has posted a way to bypass it, I don't remember the thread. Will only have full heat, though, unless you rig up a flow control valve.

Peter
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1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
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  #3  
Old 01-19-2004, 10:19 AM
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No vacuum line. It's just reading atmospheric pressure in the non-turbo 617.
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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
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  #4  
Old 01-19-2004, 05:04 PM
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The dreaded ACC Servo

Somewhere there is an engineer who is laughing his a__ off at supplying a design like this to the automotive industry.

Maybe it's the guy's son that rebuilds them. Who knows, but if it's cracked you can bypass using tubing and as Peter poiuinted out it is constant heat. The good thing is that the troubleshooting is pretty simple. If it doesn't work, it's broke... No fixing those babies.
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  #5  
Old 01-19-2004, 11:54 PM
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Anyone here done the bypass on this unit and can share just what needs to be hooked where?

Pics instead of long explanations would work well. Have a guy in Boulder Biodiesel who's commuting in his 300D without heat (here in Colorado), would like to do what I can for him and since I'm mechanically inclined and out of work and he can't work on cars as he works as an accupuncturist (I do too sometimes, but just on myself...., with screwdrivers and such!)

BTW, by constant heat, do you all mean that there's just no A/C and just heat when the fan is turned on, or that the heat will be on at all times, no matter what? Will it still get hot in the drivers compartment if the fan isn't on?

I suppose having collant run through the heater core 100% of the time isn't all bad, unless there's enough flow-through to make it hot inside even when the fan is off.
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1984 300D Turbo - 4-speed manual conversion, mid-level resto

1983 300D - parts car

1979 300TD Auto - Parts car.

1985 300D Auto - Wrecked/Parts.


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"If you don't know where you are going, any road will get you there". Lewis Carrol
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  #6  
Old 01-20-2004, 12:03 AM
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Location: Back in Colorado for now
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Quote:
Originally posted by kerry edwards
No vacuum line. It's just reading atmospheric pressure in the non-turbo 617.
Will any adjustment help, as with the turbo alda?
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1984 300D Turbo - 4-speed manual conversion, mid-level resto

1983 300D - parts car

1979 300TD Auto - Parts car.

1985 300D Auto - Wrecked/Parts.


=========================

"If you don't know where you are going, any road will get you there". Lewis Carrol
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  #7  
Old 01-20-2004, 12:03 AM
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There's a whole thread of this somewhere in the past. I believe it is quite simple. There are two heater hoses coming in and two heater hoses going out of the servo. Disconnect these lines from the servo and hook them together with two pieces of pipe (copper or pvc). Then the coolant has no hindrance to running freely thru the heater core.
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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
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  #8  
Old 01-20-2004, 12:06 AM
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Posts: 18,353
No adjustment. Face it, the 300d NA's are dogs at our altitude.
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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
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