I have been working on the climate control system for a few weeks. so far I have fixed the AC system and after many trials fixed or replaced all of the vacuum actuators and switchover valves. I believe it is now working to factory specs. the issue is this. now that all of the vents are moving, my AC sucks. when I originally fixed the AC, the vacumm wasnt working to the switchovers and a few valves and pods were bad. so my system was :

open recirc
closed floor
closed defrost
closed main flap
open top

this resulted in ice cold air blowing in my face at good velocity

now with the system fixed and AC on high fan on high the sysstem is:

open recirc
open main
partially open defrost
open floor
open top

this results in a pittance of cold air blowing in my face and it takes about 30 minutes to cool the car.

I kinda liked the high velocity cold air in the face, I was wondering if the blower speeds can be increaesed or if anyone has put in a bigger blower motor, maybe from a bigger or newer MB? could the old one just be weak?

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)

Your evaporator is probably clogged up with many years worth of dust and crud. If the blower sounds like it is going full blast and the volume coming out of the vents is low and all of the actuators are working that's where I would look next. I have seen some pulled from cars which were 90%+ blocked! The air would just go around them - what little could that is. That is why the new cars with the dust filters are a big advantage...unless you don't change them!

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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz

bummer, I think the evap was changed by the PO, but is there a good way to inspect it? I really dont want to break my AC system seal and I definitely am not ready to pull the dash

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)

If the CD is like the SD you can insert a small digital point & shoot camera (with flash and chime to alert you that it's done focusing) into the evap box (remove blower to access). Just blindly take shots in the general direction of the evap slightly changing angles as you go.

Here's a shot of mine before cleaning. Note rats nest of leaves and twigs being converted to compost at far end.

Attached Thumbnails

 

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'83 SD, 2x '85 SD
You are entitled to your own opinions, you are not entitled to your own facts.

Lutz, I have also often wondered about this same thing. Sometimes i'll reach over and close the passenger side vents so I can blast all the cold air in my face. I also hate it at idle because the blower motor slows down.

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1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg

first I will check the evap for clogging, that picture reminds me how the oak leaves here can find every small crack. after that Im thinking of adding some supplimental buttons to the CCU that will control the vent pods specifically. I can just wire an on/off switch to the switchover valves and control them by themselves

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)

Rip out the whole blasted mess, and install one from a 240D with manual controls.

Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

I put it on the middle button, which cuts out the windshield, and closed the pass side vents and its tolerable. unfortunately my 4 speed grenaded 2 blocks from the house, I was able to limp home in 1st-2nd but 3rd-4th makes an aweful racket. luckily I have a spare steel case 4 speed in the barn. its already swapped in, just need to add linkage, drive shaft and fill the box with trans fluid and I hope to be back in business tomorrow

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1982 300CD Turbo (Otis, "ups & downs") parts for sale
2003 TJ with Hemi (to go anywhere, quickly) sold
2001 Excursion Powerstroke (to go dependably)
1970 Mustang 428SCJ (to go fast)
1962 Corvette LS1 (to go in style)
2001 Schwinn Grape Krate 10spd (if all else fails)

I took a water hose and a long handled brush to mine - just make sure your drains are working - i got lots of dust and crap out of mine.. Works better now - doesnt smell either.

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Thomas

2003 Jetta TDi
1983 300SD
1999 Ford Contour - died - Oil pump
1998 Chevy Blazer - money pit
1997 Toyota Corolla - wrecked
1983 Honda Civic - still on the road
1980 Datsun 310 - long dead
1976 Ford Granada - my 1st car - best A/C ever


"Listen, strange women lyin' in ponds distributin' swords is no basis for a system of government. Supreme executive power derives from a mandate from the masses, not from some farcical aquatic ceremony."