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  #1  
Old 03-29-2006, 07:35 PM
Austin85's Avatar
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Question IS Vac leak related to A/C

I know I have a vacuum leak in my door locking system.
I also have an A/C that doesn't blow too strong and not at all thru the center vents.

Can te A/C issue be related to the Vac leak ?

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  #2  
Old 03-29-2006, 08:45 PM
krs krs is offline
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Yes.
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Old 03-29-2006, 09:53 PM
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If the two center vent aren't blowing any air then the accuator pod is probably done. And guess where it is. It's right behind the two center vents up near the windshield. I was able to test mine with out pulling the dash. But to get to the accuator you have to pull the dash out. I pulled mine, put replacement diaphrams in all the accuators and put the dash back in all in a days time. It's reall not too bad.
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  #4  
Old 03-29-2006, 10:07 PM
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Quote:
Originally Posted by Biodiesel300TD
I pulled mine, put replacement diaphrams in all the accuators

Where did you get the replacement diaphrams, if you don't mind me asking?
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  #5  
Old 03-29-2006, 11:20 PM
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Quote:
Originally Posted by JimmyL
Where did you get the replacement diaphrams, if you don't mind me asking?

http://www.autoluxmbz.com/ACDI.html

I got that covered....BUt to hear removing the dash and putting it back is "not all that bad..";
If you feel like spending a weekend in south Florida Andrew,... let me know. I'll supply the beverages!!
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81 300SD -
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  #6  
Old 03-30-2006, 12:18 AM
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Thanks for the link Austin.
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Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John
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  #7  
Old 03-30-2006, 12:40 AM
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Quote:
Originally Posted by Austin85
I know I have a vacuum leak in my door locking system.
I also have an A/C that doesn't blow too strong and not at all thru the center vents.

Can te A/C issue be related to the Vac leak ?
When you say the A/C does not blow "too strong", are you referring to the vents where it discharges or the temperature of the discharge air?

If the vacuum system is compromised, and the climate control system is failing to get proper vacuum, then the proper doors won't open and close........usually resulting in a default to the defrost flaps.

You can test this system with a proper Mityvac and/or vacuum gauge. With the Mityvac supplying vacuum, see if the system functions as designed. If so, then the doors are causing a significant leak to the entire system.
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  #8  
Old 03-30-2006, 02:00 AM
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So that was a yes??
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81 300SD -
93 300E w/ 3.2
85 300D-
79 300SD
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87 Porsche 924S

"..I'll take a simple "C" to "G" and feel brand new about it..."

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  #9  
Old 03-30-2006, 10:21 AM
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Quote:
Originally Posted by Austin85
So that was a yes??
.........how about.........."maybe".............
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  #10  
Old 03-30-2006, 11:51 AM
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Quote:
Originally Posted by Austin85
http://www.autoluxmbz.com/ACDI.html
I got that covered....BUt to hear removing the dash and putting it back is "not all that bad..";
If you feel like spending a weekend in south Florida Andrew,... let me know. I'll supply the beverages!!
If I were a few miles closer or was making a trip to your area I would be all over helping you out.

Yup, thats where I got mine.
The only one that caused me problems was the pod with two diaphrams in it. But I was able to eventually get it apart to replace both diaphrams, but it required some reconstruction to get it back together.

I would check all the pods to see which are leaking. Make sure that's what is actually wrong before pulling the dash. If they don't hold vac and you can't hear or see the actuators working they leaking.
My '82 wagon had four. One on near the drivers feet on the right behind center console, one was directly behind the center console up against the firewall (this one was the hardest to get to even with the dash out), one behind the center vest, and last one was in the pasengers dash area, I don't remember exactly where. They are all bright pink so they are easy to find. I replaced all mine wether they were leaking or not becuase I didn't want to have to pull it out again.

Some dash removal hints.
-pull the steering wheel.
-pull the trim of the rails that go up the sides of the windsheild. Not nessesary but help full. Carefull with the VIN tag though, mine came off.

I know it sounds daunting but all you really have to to is
-remove the intrument cluster
-the speakers, there are two screws unders the grills that hold the dash on
-pull the vent hoses off all the vents
-disconnect the light and switch in the glovebox, you really don't have to take it out.
-Take out the four bolts that hold the dash in, one on either side for the foot wells.
-remove the e-brake lever and headlight switch.
I think thats it.

Also I found a vac check valve for the door locks under my dash. I don't know if it was leaking but again I replaced it with a new one becuase there was absolutely no way to get to it with the dash in. It was right up near the windshield on the driver's side.
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  #11  
Old 03-30-2006, 02:45 PM
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I thought of one other thing--

I happened to be at the junkyard the week before I was going to attempt the dash removal. So I did a trial run on a wagon in the junkyard, granted some of the stuff was already disconnected, but it have me a better idea of how to do it on my car before I actually attempted it.
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  #12  
Old 03-30-2006, 03:47 PM
Austin85's Avatar
Smells like Diesel..
 
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Wow.
Cool advice Andrew.
I may actually attempt this DIY....

Any particular tools needed to remove or replace dash?
& How do you remove the steering wheel?
__________________
'87 924S
'81 280SEL

Sold ->

81 300SD -
93 300E w/ 3.2
85 300D-
79 300SD
82 300CD
83 300CD - CA
87 190E 5 spd
87 Porsche 924S

"..I'll take a simple "C" to "G" and feel brand new about it..."

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  #13  
Old 03-30-2006, 03:54 PM
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Join Date: Dec 2004
Location: Albany, OR
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Quote:
Originally Posted by Austin85
Wow.
Cool advice Andrew.
I may actually attempt this DIY....

Any particular tools needed to remove or replace dash?
& How do you remove the steering wheel?
No special tool needed, just the typical wrenching tools.
To pull the steering wheel-gently pry the emblem out of the center of the steering wheel, or pull the whole pad off. Then unbolt it. It's a big bolt, I don't remember what size.

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