Reply
 
Thread Tools Display Modes
  #1  
Old 31-12-13, 19:29
gypseywilson gypseywilson is offline
Van Expert
Official MemberVW Transporter
 
Join Date: Nov 2007
Location: UK
Posts: 43
T4 Post Icon 2.5 Vacuum Pump stripdown and fix.

Just a quick note about rattly pumps. Mine had been knocking for ages and I'd been on this forum looking at various ways of sorting it.I'd just about decided to get a genuine VW one after all the horror stories about the cheap ones on fleabay and then got some info about the angle they're fitted isn't the way Pierburg (the manufacturers of the pump) designed them to be fitted. Evidently because of the angle they're fitted oil gets behind the piston over a period of time and stops the piston returning fully so more clearance for the pump pushrod.........and we know what that means................nasty rattle!! Anyway decided to do it yesterday so pump off and to the bench.Took the 6 Torx bolts out and took the plate off, it's not under load or anything but there's some seals and valves there so either take a note of what goes where or take some photos.When you've got that lot out of the way put a 15mm socket in the vice,put the end of the piston rod in it and undo the nut on the other end(11mm spanner) Leave a few threads to go then just take the tension off by clamping it up in the vice. Now you can remove the nut,open the vice and remove the piston rod and spring. The only thing now holding the piston is friction so either clout it on a wooden surface or poke it out from behind. The piston has a stepped nylon seal so take care of it.Now the interesting bit, mine had less than a teaspoon of oil behind the piston so I wasn't convinced that oil was the problem but I carried on and cleaned the oil up.Putting it back together is just a reversal of the way it came apart,making sure you get all the valves in correctly(I think they'll only go in the right way). I realised that something had changed when I started to fit it back on.............because the piston was now returning fully the overall length of the piston rod and the separate pushrod was now longer making it just a little more awkward to fit!! Got it all back together and fired it up and............rattle's gone!!!!! Acess is a pig so it's not the easiest job to do but so far so good. Maybe it'll get oil behind again but I reckon it's worth a try for the money I've saved!!
Reply With Quote Quick reply to this message
  #2  
Old 01-01-14, 11:36
Gremondi's Avatar
Gremondi Gremondi is offline
Van Guru
 
Join Date: Sep 2010
Location: Norwich
Posts: 181
Default Re: 2.5 Vacuum Pump stripdown and fix.

I wish I had the balls to attempt this great job though, and good guide for anyone who try's it!
Reply With Quote Quick reply to this message
  #3  
Old 01-01-14, 19:36
dekland50 dekland50 is offline
Van Guru
 
Join Date: Mar 2012
Location: LincolnshireUK
Posts: 197
Default Re: 2.5 Vacuum Pump stripdown and fix.

Thanks for the Info, I will be giving this a try when the weather gets better.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #4  
Old 01-01-14, 20:58
aladins78 aladins78 is offline
Van Guru
Official MemberVW Transporter
 
Join Date: Aug 2012
Location: Essex
Posts: 204
Default Re: 2.5 Vacuum Pump stripdown and fix.

I did this on mine about 3000 miles ago and so far its still silent.
Reply With Quote Quick reply to this message
  #5  
Old 02-01-14, 06:18
wrongvanman's Avatar
wrongvanman wrongvanman is offline
Lord of the T4s
I Support CLIC Sargent
 
Join Date: Jun 2011
Location: Tenterden
Posts: 1,088
Default Re: 2.5 Vacuum Pump stripdown and fix.

Any pics?
Reply With Quote Quick reply to this message
  #6  
Old 02-01-14, 09:01
Abyss's Avatar
Abyss Abyss is offline
Serial Poster
I Support CLIC Sargent
 
Join Date: Mar 2011
Location: Melbourne, Australia
Posts: 3,259
Default Re: 2.5 Vacuum Pump stripdown and fix.

I've got 3 spare working pumps knocking about if anyone wants any, they fit 2.4d and 2.5tdi's.
Reply With Quote Quick reply to this message
  #7  
Old 02-01-14, 09:23
gypseywilson gypseywilson is offline
Van Expert
Official MemberVW Transporter
 
Join Date: Nov 2007
Location: UK
Posts: 43
Default Re: 2.5 Vacuum Pump stripdown and fix.

Quote:
Originally Posted by wrongvanman View Post
Any pics?

Sorry mate, I didn't take any. If you've got any mechanical aptitude it's fairly straight forward, all you have to do is take care removing the lid. There's nothing under load under it but just make sure when it comes off you make a note where everything goes.
Reply With Quote Quick reply to this message
  #8  
Old 07-10-18, 22:02
pedalman pedalman is offline
Van Jedi
 
Join Date: Aug 2010
Location: North Cumbria
Posts: 369
Default Re: 2.5 Vacuum Pump stripdown and fix.

My van is my everyday vehicle , how many hours would this job take and how difficult is it to do ? I'm told it's pain to get at the bolts ......any tips ?
Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the VW T4 Forum - VW T5 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Location
Where you live
First Name
Surname
Postcode
Postbit Orientation
Change the display of the avatars and members types.
Insurance
Please select your insurance company (Optional)
Body & Engine Type
Tell us about your van.

Log-in


Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 Off


All times are GMT. The time now is 20:53.