Tdi Injection Pump Leak - Defender Source
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  #1  
Old December 30th, 2011, 03:45 PM
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Tdi Injection Pump Leak

Anyone with a Tdi experience a diesel leak from the injection pump where it bolts to the timing cover?

I assume there's an out seal in there somewhere....
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  #2  
Old December 30th, 2011, 03:58 PM
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Sounds like front shaft leaking... i'd want to pull the front cover off of the timing chest and see if my belt was saturated with fuel.

Think it's going to be a pump off and send away job for repair.
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Old December 30th, 2011, 04:10 PM
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Wouldn't I have fluid coming out the drain hole in the bottom if that was the case?
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  #4  
Old December 31st, 2011, 02:19 PM
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I'd have thought you would have fuel coming out the drain hole, it's the path of least resistance. Are you absolutely sure the fuel is leaking from the inside of the pump? Could it be a fault external to the pump.
Major pain in the wallet if it is the pump
Is the pump tight on the timing belt chest?
I'd clean up the area and verify where the fuel is leaking as a first step. There's a little inspection cover held on with 3 fasteners, I'd pull that and have a peak inside.
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Old December 31st, 2011, 02:27 PM
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Haven't delved in to just yet, but I did crawl under and poke around.

Definetely need to clean up the area and verify leak, but it's wet underneath and by the case. I'm hoping it's something loose.
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  #6  
Old December 31st, 2011, 04:04 PM
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I thought mine was leaking too but was the return line. New line , no leak.
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Old December 31st, 2011, 05:02 PM
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Quote:
Originally Posted by MC22958
I thought mine was leaking too but was the return line. New line , no leak.
I hope it's thats all it is...
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  #8  
Old December 31st, 2011, 06:43 PM
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Put a seal kit in it. You can buy them on Ebay. Buy the special 3 sided socket tool. VEs all piss fuel if they have the old non ULSD seals in them.
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Old January 1st, 2012, 11:57 AM
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So the leak is coming from the top of the pump at the bolt noted by the screwdriver. Thoughts? It's not loose either.
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  #10  
Old January 1st, 2012, 12:42 PM
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Quote:
Originally Posted by Wolf Fabrication View Post
So the leak is coming from the top of the pump at the bolt noted by the screwdriver. Thoughts? It's not loose either.
Governor shaft O ring.

http://www.vwdieselparts.com/forum/viewtopic.php?t=6694

Seal kit would do it, you have to pull the top cover.
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  #11  
Old January 1st, 2012, 01:07 PM
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Are you sure we are talking about the same bolt? The reason I ask is that this bolt won't come out unless I remove the pump itself. Does the seal you are talking about share the same passage as the bolt?

I was able to back it out 1/4" and clean it up with air and pipe cleaners. Someone else had already tried to RTV it. I put some Loctite on the threads and washer and will see if that holds.
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  #12  
Old January 1st, 2012, 01:42 PM
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Oh, you definitely have to pull the pump, but at least you don't have to pull all the internals. They are a pretty simple pump to mess with. The link I sent you should give you an idea of how it all comes apart. I think the local pump shop only charges 2-300 bucks for a reseal, might be best to find a place where you can just drop it off and get it done.
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  #13  
Old January 1st, 2012, 01:53 PM
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Yeah, that's the next step after I see if my bandaide holds.
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Old January 1st, 2012, 02:12 PM
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If it is leaking from that O ring, chances are the advance cover, top cover, control shaft etc are going to eventually start leaking. The patch will buy you some time but I would put a seal kit in it to avoid further mess.
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  #15  
Old January 1st, 2012, 02:14 PM
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Quote:
Originally Posted by oilburner
If it is leaking from that O ring, chances are the advance cover, top cover, control shaft etc are going to eventually start leaking. The patch will buy you some time but I would put a seal kit in it to avoid further mess.
Should there be an O ring on that bolt? Mine just has a washer.
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  #16  
Old January 1st, 2012, 03:07 PM
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Yep. It is further in, ahead of the threaded section. The link I sent you has a good pic of the part.
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Old January 1st, 2012, 08:53 PM
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Vally injection in Lynchburg re-built a pump for me. They seemed to do a good job.
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  #18  
Old January 2nd, 2012, 02:12 PM
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So my Loctite patch worked, I'll see how long it holds. Thanks for your help!
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  #19  
Old January 2nd, 2012, 03:34 PM
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Quote:
Originally Posted by oilburner View Post
Governor shaft O ring.

http://www.vwdieselparts.com/forum/viewtopic.php?t=6694

Seal kit would do it, you have to pull the top cover.
Great web site.
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