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Evil Servo is dead!
the Climate servo on my '81 is toast, it only blows air in defrost mode. is there a way to bypass the system or possibly swap in a manual system from a different year? i have heard that some folks install a petcock with a manual choke cable to solve the problem? any insight on this issue would be appreciated.
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Answer
I hope this helps.
Evil Servo service manual Evil Servo, service manual - PeachParts Mercedes ShopForum Evil Servo bypass Evil Servo bypass Maybe pictures will help. Trying to get my heater working. Where to start? Maybe pictures will help. Trying to get my heater working. Where to start? Unless you are talking about the push button control unit. http://www.peachparts.com/Wikka/W123ClimateControl Climate Control: .
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ Last edited by whunter; 09-24-2012 at 06:11 PM. |
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i thought servo was up to 1980 cars.
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95 e320,87 sdl,79 300sd |
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Nope, it is in the '81's too...unfortunately. i think they omitted the automatic climate control servo in 1982? it is funny that the only part of the car engineered by Americans is a total chunk of *****!
Any who, i have heard of folks doing a complete conversion and taking out the old system and replacing it with a heating system from a later model 123 body style. there is also the plumping valve option as well, however, i have not seen any examples of either fore mentioned methods? i think the plumping valve would be my choice...love having the ghetto in my rigs. |
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81 what? The W126 had the non servo Behr system from the start (1979). I thought the W123 had gotten the W126 system by 1981.
-J
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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket Tesla Model 3. 205,000 miles. Been to 48 states! Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels. 2014 Cadillac ELR 2013 Fiat 500E. |
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Here is a post on the Wiki where someone removed the manual climate control system from a 240D and swapped it in for the servo system.
PeachPartsWiki: Auto to Manual Climate Control Conversion Looks somewhat involved but if done right looks and works stock.
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The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech |
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1980 was the last year for the ACCII system. Are you sure you have a servo?
1981 had the more modern unit with monovalve. Only blowing air on DEF sounds like a vacuum leak, how did you determined the servo was bad?
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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 |
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oh, i am positive it has/is the servo, i have had to replace many of them! it is not cheap, so, at this point i would rather omit the system and have manual controls. this rig has been going through a simplification process for the last five months. it would be nice to get rid of the servo altogether, i figure the more faulty components i delete, the more reliable of a field rig it will become. which that is my main goal for the wagon. i will photograph the servo and post it tomorrow morning.
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Gavin Leslie mentions it would be simpler to replace the whole unit, than source the bits as he did in the above thread.
I have talked to him a few times eye ball to eye ball. Here is a link from Bruce Kennedy, swapping in a 240D Type 1 system into his 83 300TD. Climate control to manual conversion He mentioned here the 1980 240D was the best yr to pull one from. Climate Control conversion editorial coming in the near future I have pulled 4 of these units from 240`s, not really all that difficult to do. you will have to remove the dash. I remove the steering wheel just to give me more room to work. practice at PNP, and remove things as if you are working on Your car. take pictures and document things as you remove them. use some masking tape to lable what wires went where etc... I have one I took apart to clean and replace the foam on the doors. cleaned out the 30yrs of dirt from the box and Evaperator fins and checked over the Heater core. that is as far as I got then got side tracked to another project. take picture as you go on this one too, there are just a bunch of clips and 3 sections to the box. 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 Last edited by charmalu; 09-25-2012 at 07:55 AM. |
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Quote:
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Brian 87 300Dturbo 180K #14 head still running R-12 SOLD 12/2017 02 F350 Powerstroke 180K 05 Chevy Express 1 ton w/Royal Utility box 120K 08 Infiniti FX-35 40K 15 Golf Sportwagen TDI 35K 10 Sprinter 3500 chassis with a Class A Winnebago on it. 56K |
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I replaced my 77 with the electronic box, a little pricey, but we are keeping the car. It works fine and keeps the rest of the controls working like they should.
You would think after MB messed with Chrysler on this they would have had enough sense not to buy them and make them profitable. ron |
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I am heading to a yard around Corvallis tomorrow to check out a possible parts car for the entire climate system. So, nobody has heard or tried the bypass method using a manual choke and plumbing petcock? That sounds the easiest?
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