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#1
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1981 240D Climate Vent Problem
I recently bought a 1981 240D with 205000 4 speed manual transmission, and had it shipped from California. I have done alot of work on the car already including: located two leaking vacuum components(fuel door, and rear passenger door), and replaced them. New window gaskets installed. New brakes installed. New glow plugs along with a new Bosch Relay. New tie rods. Two new engine mounts. The car is running great except for a couple of small issues. First off, one of my engine mounts was cracked, so I replaced them both. After doing this the car vibrates more now, then it did with the broken mount. Second, when I turn the heat on it comes out of the defroster vents, and the two side vents, but only cool air is coming out of the center vents. I can manually close those vents, but then nothing comes out of them. Finally, when I start the car and it is cold, there is a rattling sound coming from the transmission. However if I press the clutch it, it immediately stops. But once the car warms up, the sound is gone. I know these are alot of questions, but any help would be greatly appreciated. BTW I absolutely love this car. This is a great site. Thanks in advance.
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#2
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On the center vents, that's the way my car works and pretty sure that is the way it is supposed to be. I'm fairly certain the center vents are for fresh air and air conditioning only. The operator's manual calls the center vents the cooling vents and the lever the cooling lever for the center vents.
As for the noise, have you checked the rear transmission mount? Mine evidently got soft from oil and caused a banging noise. Also check for loose shields on the exhaust system. |
#3
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center vents wont stop blowing
Its cold and my center vents wont stop blowing cold. Air comes though no matter what. Is the center vent control vaccume related or mechanically controled. my vaccume system is in need of fixing. no A/c.
83 240d Manual everything. |
#4
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Ditto on my euro. Center vents are def cool.
Is it not getting hot enough? Europeans cant build an AC unit to save their lives but they sure can whip out some heat.
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http://superturbodiesel.com/images/sig.04.10.jpg 1995 E420 Schwarz 1995 E300 Weiss #1987 300D Sturmmachine #1991 300D Nearly Perfect #1994 E320 Cabriolet #1995 E320 Touring #1985 300D Sedan OBK #42 |
#5
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Yeah the side vents crank out enough heat to melt an iceburg, but I am wondering now if the center vents are supposed to also provide heat, or are they designed to just be used with the AC? I will check the transmission mount, does anyone know wher eit is on a manual tranny?
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#6
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The tranny noise could be the "throw out" bearing. The trannys are fairly easy to pull. Ask a good MB shop to "take a listen"
__________________
1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car" |
#7
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If it is the throwout bearing, is it something I need to get fixed ASAP? Can it cause any damage to the tranny? Thanks for all the replies
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#8
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The climate system is designed to never blow warm air from the center vents. Manual systems as well as auto climate systems. If it does blow warm from them then there is a vacuum problem. The reason they enable the outer vents to blow warm is to direct them to the side windows to help defrost them.
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81 300CD (sold) 1972 280 SEL 4.5 (sold) 1966 250 S 4 spd (sold) 1974 450 SL (sold) 86 BMW 325ES (sold), 1973 280C (sold) 1988 300 SE. |
#9
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OK that answeres my climate control question..Thank you, does anyone have any ideas on why the car started to vibrate more after I changed the motor mounts?
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#10
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I'd like to know about the motor mount vibration as well as mine is a simliar car which I'm planning to change the mounts on. Maybe the tranny mount needs changing as well?
- Peter.
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2021 Chevrolet Spark Formerly... 2000 GMC Sonoma 1981 240D 4spd stick. 347000 miles. Deceased Feb 14 2021 2002 Kia Rio. Worst crap on four wheels 1981 240D 4spd stick. 389000 miles. 1984 123 200 1979 116 280S 1972 Cadillac Sedan DeVille 1971 108 280S |
#11
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Quote:
As to your viberation, did you check the front mount. I gota say tho, I've seen some way destroyed front mounts without extra shaking. Turn up your idle
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1985 Euro 240D 5 spd 140K 1979 240D 5 spd, 40K on engine rebuild 1994 Dodge/Cummins, 5 spd, 121K 1964 Allice Chalmers D15 tractor 2014 Kubota L3800 tractor 1964 VW bug "Lifes too short to drive a boring car" Last edited by Stevo; 10-16-2006 at 06:10 PM. |
#12
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240's I've seen do have another motor mount under the front pulley. Forgot about that one.
C.Doner, the lever under the center vents is manually operated, no vacuum. It opens and closes the center vents. |
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