Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2016 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You

Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI 101

TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

Thread Tools
Old January 1st, 2018, 09:45   #1
Veteran Member
midairmark's Avatar
Join Date: Aug 2008
Location: GA
Fuel Economy: 55-60 MPG-6 speed
Default Fuel leak at top of injection pump mk4

I notice I have a small drip of fuel coming from the top of the injection pump; appears to be where the top plate meets the main body (under the 4 bolts the piece that slides for the hammer mod). I've tightened 3 of the 4 but I do not have that 5 sided socket to tighten the last one. I've tried every socket, wrench but cannot find something to try to snug it up to see if it stops the drip.

Has anyone had this issue and what did you do to get it to stop dripping? Is there a gasket under there to replace?

MK4 Jetta, it is the auto fuel pump.

midairmark is offline   Reply With Quote
Old January 1st, 2018, 10:08   #2
Veteran Member
Join Date: Dec 2013
Location: fredericksburg virginia


Happy viewing!
drucifer is online now   Reply With Quote
Old January 1st, 2018, 10:43   #3
Veteran Member
midairmark's Avatar
Join Date: Aug 2008
Location: GA
Fuel Economy: 55-60 MPG-6 speed

midairmark is offline   Reply With Quote
Old January 2nd, 2018, 07:43   #4
Powder Hound
Veteran Member
Powder Hound's Avatar
Join Date: Oct 1999
Location: Conkud, New Hampshiyuh, USA
Fuel Economy: pretty freakin' good.

Just a little general information for the benefit of everyone: the link points to a thread with other repair links for this operation. Basically you need a new gasket pair at the very least, a special socket to fit the Bosch anti-tamper fastener, and VCDS to make sure you can adjust the IQ correctly on reassembly. The torx bit should be in your possession already, if you are working on VWs.

This is not a difficult repair by any means, can be performed on the car easily in less than an hour. Just keep everything as antiseptically clean as possible, as this is a very very bad place to introduce any kind of dirt or other foreign material. If I were you, I'd scrub the outside with a toothbrush and carb or brake cleaner just on general principles, then have some paper towels available to keep any messes from happening.

You will probably want a vacuum pump to re-prime the injection pump when you are ready to re-start. And be sure to carefully mark the covers so you can put it back together as close to the original position as humanly possible. It is not possible to be too careful here, as it will save you lots of frustration in getting that initial start if you do it right.

Good luck,

You always pay for what you get. Sometimes you get what you pay for.
It is called dope because it does make you dumb.
Thinking outside the box is difficult for some. They're afraid they'll fall off the edge of the box and be lost to oblivion.
Powder Hound is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools

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 Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
fuel leak behind injection pump hazrd VW MKIV-A4 TDIs (VE and PD) 3 January 9th, 2017 20:33
Can't stop the top injection pump leak..HELP Spohntaneous TDI 101 0 March 13th, 2011 13:27
Fuel seep at top of injection pump mudthompsonboo TDI 101 1 June 5th, 2009 20:44
Fuel injection pump leak tbailey4 VW MKIII-A3/B4 TDIs 2 June 15th, 2006 09:57
Fuel Injection Pump Leak grnmtnjj VW MKIV-A4 TDIs (VE and PD) 6 September 27th, 2005 11:44

All times are GMT -7. The time now is 21:08.

Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2017
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2017, All Rights Reserved
Page generated in 0.12613 seconds with 12 queries
[Output: 64.23 Kb. compressed to 57.63 Kb. by saving 6.61 Kb. (10.29%)]