Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #31  
Old 08-09-2012, 11:45 PM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 23,521
Quote:
Originally Posted by greazzer View Post
Here's the part # for what I was talking about. PART NUMBER: 8E0-927-317 A

-FITS 99-05 AUDI A4/S4, 98-07 AUDI A6/S6, 01-05 AUDI A6 ALLROAD, 03-07, AUDI A8, 03-07 AUDI A4/S4 CABRIO, 07 AUDI Q7, 07 AUDI RS4, 03-04 AUDI RS6, 01-05 PASSAT/ 4MOTION, 02-07 TOUAREG

Not sure about the heat issue. I ran mine as a very brief experiment before my car got totaled and it was not hot. So, either yours may have had a short of some sort or the Bosch unit has a built in chip which limits the heat and pumps operation. IDK. I hope to have my car back from the paint place by mid September so that these odd ball issues can be explored and a bunch of pictures taken to be posted. The Phoenix project is now over the hump !
Did you actually check to see if it was hot or not; I only found out by accident. Only the top of the Pump where the Vane Pump is was hot. The Motor itself did not seem abnormal hot. Maybe that heat is normal for them.
And, as I said all the stuff in the Car that needed Vacuum worked as it was supposed to.

Also the V Pump I used was a new one I got on eBay and it is not made by Bosch. I think it is was made by Hella.
I also have a used one somewhere that I have misplaced.

Besides Audi, VW, Saab and Volvo have used them.

In any event it is easy to see the Value of a Vacuum Shutoff Switch.
__________________
84 300D, 82 Volvo 244Gl Diesel

Last edited by Diesel911; 08-10-2012 at 12:52 AM.
Reply With Quote
  #32  
Old 08-10-2012, 07:50 AM
greazzer's Avatar
Registered User
 
Join Date: Sep 2010
Location: South Carolina
Posts: 4,660
I agree and I will copy-cat your suggestion for the VS Switch. I did pull it after driving it around for about 10-15 minutes. A LOT of break pumping and you're right that it works just like the OEM. I doubt there was 5-10 minutes before I yanked it, so I am pretty sure if it was hot or warm, I would have noticed it. I think with the VS Switch the heat should not be an issue. MB has a pretty decent sized vacuum resevoir compared to other makes, so I am thinking it will really run minimally, especially for me as I only have vacuum breaks and the doors/trunk pods/ and the little bit in the HVAC (manual controls).
Reply With Quote
  #33  
Old 08-10-2012, 09:48 AM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 23,521
Quote:
Originally Posted by greazzer View Post
I agree and I will copy-cat your suggestion for the VS Switch. I did pull it after driving it around for about 10-15 minutes. A LOT of break pumping and you're right that it works just like the OEM. I doubt there was 5-10 minutes before I yanked it, so I am pretty sure if it was hot or warm, I would have noticed it. I think with the VS Switch the heat should not be an issue. MB has a pretty decent sized vacuum resevoir compared to other makes, so I am thinking it will really run minimally, especially for me as I only have vacuum breaks and the doors/trunk pods/ and the little bit in the HVAC (manual controls).
The Vacuum Resevoir is isolated by the Check Valves in the Locking System and is of no help to the Power Brakes.
The Transmission part of the Vacuum System always has a leak at the Vacuum Valve.

In My case I connected it to the Normal Brake Booster Line (I replaced the Hard Plastic Tubing with Rubber Emissions Hose and also made it longer so as to route it along the Fender Well top).
Connected like that without a Check Valve allows the Vacuum to leak out of the Pump itself. That means when the Car sits the part of the Vacuum Circuits that do not have their own Check Valves like the Brake Booster and Door Lock system looses vacuum.
I already have some Check Valves. Someday I will have the Vacuum Shutoff Switch also and will connect it up again.
Another idea I had that I did not try is what if you wired the Electric Vacuum Pump to a Switch that worked off of the Brake Pedal so that as soon as there was any pressure on the Brake Pedal the Vacuum Pump was on.
I don't know if the V Pump could create enough Vacuum Fast enough like that to work correctly.
Maybe if a Vacuum reservoir was added.
That would only supply Vacuum for the Brakes Booster.
__________________
84 300D, 82 Volvo 244Gl Diesel

Last edited by Diesel911; 08-10-2012 at 10:01 AM.
Reply With Quote
  #34  
Old 08-10-2012, 01:05 PM
greazzer's Avatar
Registered User
 
Join Date: Sep 2010
Location: South Carolina
Posts: 4,660
Since I got a 5 speed going into my W123, I dont need any transmission vacuum stuff.

Do you think adding an extra vacuum tank hidden behind the fender would be a good deal ? Because I am looking at some alternatives with my breaking system, although somewhat pricey, I can actually get rid of my entire vacuum assisted break system. If I went that route, I would be able to get rid of a bunch of stuff and the vacuum requirment would be super low, e.g., just for the locking system and HVAC.

Once I get my block back from the machine shop, I will post a bunch of pictures with all my stuff removed from the block. Right now, the only crucial mechanical pumps are the altenator & IP, and the A/C in the summer months. Other than that, it's electric. I am very impressed with the Davis-Craig EWP and I am OK with a mechanical / manaul steering box even though I was warned it was horrible to turn the wheel. Not so bad IMO.

Let me know your thoughts if you don't mind because the fenders are going back on within a week or 2.
Reply With Quote
  #35  
Old 08-10-2012, 09:29 PM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 23,521
Quote:
Originally Posted by greazzer View Post
Since I got a 5 speed going into my W123, I dont need any transmission vacuum stuff.

Do you think adding an extra vacuum tank hidden behind the fender would be a good deal ? Because I am looking at some alternatives with my breaking system, although somewhat pricey, I can actually get rid of my entire vacuum assisted break system. If I went that route, I would be able to get rid of a bunch of stuff and the vacuum requirment would be super low, e.g., just for the locking system and HVAC.

Once I get my block back from the machine shop, I will post a bunch of pictures with all my stuff removed from the block. Right now, the only crucial mechanical pumps are the altenator & IP, and the A/C in the summer months. Other than that, it's electric. I am very impressed with the Davis-Craig EWP and I am OK with a mechanical / manaul steering box even though I was warned it was horrible to turn the wheel. Not so bad IMO.

Let me know your thoughts if you don't mind because the fenders are going back on within a week or 2.
A Vacuum Reservoir helps when you have a bunch of fast repeated brake Pumping.

I am using an old Coffee type Can for for one on my Volvo Diesel after the Plastic one Cracked.

The Vacuum Pump on that is another Peirburg but a different design. You cant go down to the local Junk yard and expect to find one.
It has a Manual Transmission with Overdrive and only the Brakes need Vacuum.

If you eliminated the Vacuum Brake Booster what would be the alternative to replace the Power part of the Power Brakes.

My 53 Chevy PU Truck has no Power Brakes but they are Drum Brakes. Ther Servo Action of the Brakes uses part of motion of the Vehicle to help with the Braking Power.

I know when I had my Vacuum Check Valve on the V Pump Fail the braking got Scary hard.
Stronger Leg Muscles needed Fast!
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #36  
Old 08-11-2012, 08:02 AM
greazzer's Avatar
Registered User
 
Join Date: Sep 2010
Location: South Carolina
Posts: 4,660
I was thinking of a hydraboost since there is a nice, sexy electric pump I was eyeing. It is designed specifically for this type of application. That is, it only goes on when needed and there is a chip already designed into the pump. Obvsiously, junk yard is the only way to go since it is very pricey new. I am not really leaning that way, so I think I will stick to the vacuum side of the house and copy cat the valve idea since maybe I wasnt running my car long enough to get hot and/or I waited too long to yank it so it cooled down. OR, if I really get tired of manual/mechanical steering, then I will revist the hydraboost since that will then incorporate my conversion to power electric steering and that will really solve a bunch of issues and elevate my car to a new level. But, if I go that route, then there goes my supercharger most likely.
Reply With Quote
  #37  
Old 08-18-2012, 10:54 AM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 23,521
On eBay Summit Racing is selling a whole kit with free shipping for $206 and has the Vacuum Shutoff Switch and a Relay.
There Old kit with a different type of Vacuum Pump used to sell for around $265.
The new; Newer Vacuum Pump Kit now costs less than a replacement Pierburg Vacuum Pump.

Right Stuff Detailing EVP01 Vacuum Pump 12 V DC Black Hose Kit | eBay
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #38  
Old 07-06-2013, 01:33 AM
Registered User
 
Join Date: Feb 2009
Posts: 59
Old thread, maybe a new idea?

The 300sd has a electric pump in the trunk for the door locks and maybe a switch set up.

Any thoughts on this?

Tom
Reply With Quote
  #39  
Old 07-06-2013, 09:39 AM
Registered User
 
Join Date: Jan 2002
Posts: 18,353
How did the Unimogs and GWagons with deleted vacuum pumps shut off? The MB vans have no vacuum components beside the shut off. They kept the vacuum pump solely for that purpose.
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #40  
Old 07-06-2013, 10:07 AM
Registered User
 
Join Date: Sep 2006
Location: san marcos, Texas
Posts: 428
i'm working on something this weekend. i'll start a thread if i get anything completed.
__________________
1982 300sd from craigslist $800 greased on one tank with NO CONVERSION in the Hot Texas Sun. (currently dead & awaiting engine damage investigation and/or longblock swap)
new daily: '03 vw 5speed jetta tdi wagon. bagged&chipped
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 02:37 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page