injection pump cover leaking 98 AHU engine - TDI Engine -General Info - VWDiesel.net The IDI, TDI, and mTDI source.

• injection pump cover leaking 98 AHU engine by ilikevwdiesel on 24 Jan, 2011 17:41
• the cover on the top of the injection pump of my 98 jetta is leaking. anyone ever taken the top off of one? do springs and things go flying  when the cover is removed? need to fix it ASAP. looks like there's 4 small allen heads holding it on. where can I get the seal?
  
  thanks...
• #1 by 8v-of-fury on 24 Jan, 2011 18:16
• IIRC it is nearly identical to the 1.6 and 1.9 idi pumps in there.. with the lack of a throttle shaft going through it? I think i read this somewhere, somebody else needs to chime in though. lol
  
  http://www.idparts.com/catalog/product_info.php?products_id=1784
  
  Seems as though removing the pump cap/lid/cover will not cause you to loose any of your calibrations.
• #2 by ilikevwdiesel on 24 Jan, 2011 18:49
• thanks for that ID parts link bro. I've spoken with the owner of that site he probably knows what's involved in changing that seal. I'm pretty sure that when you remove it you have to reinstall it in the exact same position that it was in before it's removed or it will affect the timing.
• #3 by snakemaster on 28 Jan, 2011 04:09
• dead easy to do just take out the 4 bolts lift off cover remove seal , fit new seal and when refiting the cover you got to get the botom of the E lever back on the control spool .
• #4 by BigVWman on 28 Jan, 2011 11:47
• I don't believe its pump timing, but It does effect one of the settings though, maybe quantity adjustment iirc.
• #5 by the caveman on 28 Jan, 2011 13:50
• The only thing that will happen is if it's dirty and some crud falls inside. super easy
• #6 by Powered by Spearco on 29 Jan, 2011 00:07
• There is two tops to a TDI pump. the tippy top cover is easy to do. The next one down is just as easy but garrantied you'll need to do the "hammer mod " to readjust the quantity. You'll also need VagCom to do that as well. IIRC, taping to the drivers side increases and taping to the passengers side decreases quantity. Its been a while sence my last one, so it could be the other way.
• #7 by the caveman on 29 Jan, 2011 11:42
• Quote from: Powered by Spearco on 29 Jan, 2011 00:07

  There is two tops to a TDI pump. the tippy top cover is easy to do. The next one down is just as easy but garrantied you'll need to do the "hammer mod " to readjust the quantity. You'll also need VagCom to do that as well. IIRC, taping to the drivers side increases and taping to the passengers side decreases quantity. Its been a while sence my last one, so it could be the other way.
  

  Oh yeah, forgot about that. I tried doing that once when i was having some strange no power issues. I didn't notice a difference, even though it showed a small difference in fuel quantity in one of the measuring blocks.