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Diesel Injection Pump Losing Prime
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dcheek
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Joined: January 07, 2007
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PostPosted: Mon Apr 06, 2015 1:25 pm    Post subject: Diesel Injection Pump Losing Prime Reply with quote

I have an '82 Diesel Rabbit pickup. If I park on a hill, where the nose is higher than the back, the pump loses prime overnight - it drains back into the tank. The only thing I can figure is there is a leak somewhere that lets in air to siphon the fuel backwards. I changed all the hoses and the copper gaskets on the banjo fittings and there is no visible fuel leaking when running. What else could it be?

Dave
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73sports
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PostPosted: Mon Apr 06, 2015 7:51 pm    Post subject: Reply with quote

Fuel filter? Did you change the small return line between the injectors too?
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dcheek
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Joined: January 07, 2007
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PostPosted: Tue Apr 07, 2015 4:49 am    Post subject: Reply with quote

73sports wrote:
Fuel filter? Did you change the small return line between the injectors too?


Yes, I changed the small lines too. The filter is almost new. Upon further investigation, I think I found the leak. It's the banjo fitting on top of the injection pump. I replaced the copper seals top and bottom and it still leaks. Do the fittings go bad, and more importantly, can you get a new fitting from Bosch. Or, can I us a different type of seal or apply a sealant to it?

Dave
_________________
1961 Bug
1965 Bug
1966 Sunroof Bug
1966 Westy
1976 914 2.0
1989 911 Carrera
1981 Diesel Rabbit Pick Up
1982 Diesel Vanagon
2014 Golf (last year German mfr for NA)
2019 Jetta Gli, 35th Anniversary Edition, 6 speed
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View user's profile Send private message Gallery Classifieds Feedback
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