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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old February 7th, 2009, 17:30   #196
runonbeer
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This also reminds me to remind you all to inspect the large plunger springs in the area just to the right of the control collar being discussed above when you have it apart for seal replacement. I have found one of these to be completely broken (though still functioning) while replacing a IQ housing seal. This advisory probably only applies to very high mileage cars but you never know.

-rob
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Old February 9th, 2009, 08:11   #197
XJCoupe
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Quote:
Originally Posted by shegel
found this thread and it was super helpfull with my top and middle seal change. just thought i'd bump it
+1

Replaced top and middle seals about a month ago. Just took the engine cover off over the weekend to see if it was a successful repair. It's bone dry!
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Old February 9th, 2009, 10:44   #198
pdreyfuss
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I put vaseline on some of the parts before assembly to hold them in place against gravity.
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Old February 9th, 2009, 19:02   #199
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For what it is worth, the car seems to run better now that I changed the seals. It used to be hard to start, and then it would sputter for 5-10 seconds while all the air the got into the pump would get pumped out. Now it starts a lot more cleanly.

I used to have a problem with a diesel odor in the garage - my workaround was to increase the biodiesel percentage, and I won't know whether that problem is solved until I go back onto regular D2. That could be a while . I guess my point though is that it is possible that I need to also replace the head seal at some point in the not too distant future..
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Old February 9th, 2009, 20:22   #200
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Yeah, i expect the middle and head seals to both give out
Especially after fuel transitions (not all of which we control)
Larry
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Old August 28th, 2019, 13:33   #201
Tankthecarman
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Runonbeer, you have been tremendously helpful with your instructions. I would like to add that when my daughter got a Beetle that someone else had “taken a whack at” I found the small thrust washer in the bottom of the pump. I used TransJel TM
Quote:
brand transmission assembly lube to “glue the parts together while reassembling in chassis.
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Old September 2nd, 2019, 19:41   #202
runonbeer
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Blast from the past!
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Old November 10th, 2019, 22:33   #203
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I had a bad leak on the top of my injection pump and I swapped the rubber gasket but I notice the car takes longer to start now and the engine runs louder. Also it’s a little sluggish to pick up. I guess I didn’t install it exactly correct? What do I do to fix this issue?

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Old November 11th, 2019, 01:49   #204
Nero Morg
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Quote:
Originally Posted by Shockj2000 View Post
I had a bad leak on the top of my injection pump and I swapped the rubber gasket but I notice the car takes longer to start now and the engine runs louder. Also itís a little sluggish to pick up. I guess I didnít install it exactly correct? What do I do to fix this issue?
You probably need to check your injection quantity with VCDS.
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Old November 16th, 2019, 18:57   #205
rotarykid
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In an emergency I have dumped auto trans stop leak into my fuel tank with success in less than 200 miles of driving stopping completely a pump leak until I get home to repair the seals properly....

I have had this trick, makeshift repair last for years with no new leaks...

This trick has saved me more than a few times when I was a long way from home with a pump spewing fuel out of a seal in the injection pump ...
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