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  #16  
Old 06-13-2016, 12:29 PM
funola's Avatar
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http://www.startekinfo.com/StarTek/outside/12265/disc_2/program/Chassis/80-900.pdf
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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked
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  #17  
Old 06-13-2016, 02:04 PM
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Everyone helping here - thank you for your patience and info, so helpful.

The diagram I linked to shows the door check valve to be in the dash area - not inside the door. I don't know if that is also incorrect, in addition to the red/green color coding, but since I definitely did NOT have a check valve in the solid yellow line before it goes into the main valve, I'm going to have to look in the dash area. If I recall, BWhitmore you said your w123s had the all plastic valve - so maybe your check valve is in a different location than mine.

One final note about that diagram, it does have the red/green colors inverted - but they also inverted them in the KEY - so the green lines are labeled "lock" instead of unlock. He/she seems to have just reversed the colors so they don't match the physical lines, but the diagram is correct in it's routing/function?

Also, thanks for the details about instrument cluster - I'm going to do that to check the ignition valve - I also have some lights/wiring that I need to check. Occasionally one of my two dash lights need a light "Fonz" tap on top of the dash to turn on at night.

Rog - my vacuum doesn't hold when the doors are unlocked. as soon as I shutoff the car I have about 15 seconds to lock it or the rest of the doors wont lock. Once locked, the also do not hold any reserve vacuum, have to turn on engine and they other locks will rise up in about 5-10 seconds of idling.

-A
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  #18  
Old 06-13-2016, 02:41 PM
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It is possible that the check valve on a 1982 model is located elsewhere. I also have a 1982 300CD but have never had any problems with the vacuum door locks and thus have never had the door panel off.

I do a lot of junkyard searching and have probably removed at least 10 dashes
(The uncracked kind) from wrecked cars of all years W123 and have never seen a vacuum check valve under the dash but anything is possible.
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  #19  
Old 06-13-2016, 03:41 PM
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it looks like this detail from the FSM might show the check valve (13) to be somewhere before it gets inside the door....

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  #20  
Old 06-13-2016, 04:14 PM
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Quote:
Originally Posted by kuene View Post
One final note about that diagram, it does have the red/green colors inverted - but they also inverted them in the KEY - so the green lines are labeled "lock" instead of unlock. He/she seems to have just reversed the colors so they don't match the physical lines, but the diagram is correct in it's routing/function?
I think the lines are the correct routing, but the wrong colors, and yes the key is wrong. Red is lock, green is unlock. If you look at your fuel door lock it should have one red line going to it (or both if it's the old style).

It sounds like you might just have a straight leak or break. But you'll know once you test all the actuators.

I love FSM diagrams... Just enough info to make you think you can dive into it, but not enough to accomplish much if you don't already know everything. No mention of line colors even. The engineers might not have been lazy, but whoever was taking notes sure was.

-Rog
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