Author Topic: Delivery valves  (Read 1042 times)

July 18, 2022, 03:21:42 pm

Tomoturbo55

  • Junior

  • Offline
  • **

  • 55
Delivery valves
« on: July 18, 2022, 03:21:42 pm »
Should fuel leak out of the pump when delivery lines are removed?

Anybody ever encounter bad delivery valves? Should they work one way or Like both ways of fuel flow to pump and injectors?



Reply #1July 18, 2022, 11:26:09 pm

ORCoaster

  • Moderator
  • Veteran

  • Offline
  • ***

  • 4383
  • Personal Text
    Restoring a Caddy as time and weather allows
Re: Delivery valves
« Reply #1 on: July 18, 2022, 11:26:09 pm »
I believe they only allow fuel out to the injectors.  And yes they can get plugged up and can be cleaned up.

Reply #2July 19, 2022, 01:58:29 pm

fatmobile

  • Veteran

  • Offline
  • ***

  • 2732
    • http://www.geocities.com/vwfatmobile/
Re: Delivery valves
« Reply #2 on: July 19, 2022, 01:58:29 pm »
I think it depends what pump you have.
 Later pumps will flow out the delivery valves when the lines are removed.

 If you remove the delivery valves you can inspect them.
The circular area should have machine marks that go around it.
 If you can't see the lines going around and there are lines going parallel to the valve it is worn.
Tornado red, '91 Golf 4 door,
with a re-ringed, '84 quantum, turbo diesel, MD block

Reply #3July 31, 2022, 06:47:21 pm

sgnimj96

  • Junior

  • Offline
  • **

  • 166
Re: Delivery valves
« Reply #3 on: July 31, 2022, 06:47:21 pm »
Should replace those copper washers (6x10?)  when you put them back in.   Those dv's see full injection pressure.   
I read somewhere to tighten and loosen in 3 increasing steps to the final torque

« Last Edit: July 31, 2022, 08:45:40 pm by sgnimj96 »
81 Scirocco 1.6D (conversion)    86 Gofl 1.6D      2003 Golf Tdi   1985 300TD

 

Fixmyvw.com