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  #1  
Old 04-13-2005, 09:20 PM
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ACC servo unit

1980 450SL. The ACC servo is leaking coolant. The plastic case is cracked. Has anyone successfully taken it off and epoxy it? Alternatively can the ACC servo be bypassed. Do you loose both heat and AC when bypassed. looking for a temporary (hopefully somewhat permanent) simple and cheap solution. I'm loosing coolant. The cost of a rebuilt servo is over $350!

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1982 300D Turbo
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Old 04-14-2005, 01:26 AM
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It's a Chrysler unit. There have been many threads on this. Do a search.
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Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

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Old 04-14-2005, 06:13 AM
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Tomorrow i will take off the servo unit and try to epoxy the crack in the plastic that is allowing coolant to leak...is there a better solution under $100?
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Old 04-18-2005, 01:34 PM
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Bit the bullet and replaced the servo with a metal bodied rebuilt unit ($350). The coolant leak from the old plastic bodied servo has been eliminated. I can hear the servo park with ignition off.

Unable to get heat in any mode (including defrost). I read that the amplifier is often taken down by a bad servo. Could a bad amplifier prevent heat from coming on? I thought getting heat in defrost mode is the fail safe mode. The aux pump is OK and anyway that is only needed when idling. Blower works and air moves to different zones when different modes are selected. AC does not work because of a refrigerant leak (will deal with this later).

Could replacing the amp solve the no heat problem (even in defrost) or should I look somewwhere else and fix something else before condeming the amp as the cause of no heat?

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