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Fuel Pump Problem

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phantom Wolfsburg Wizard

598 posts · joined Mar 2004 ·

#821775
Morning all,

I have to change the fuel pump after a long running issue - its nothing flash - stock 1600 in a '72 Kombi.

The pump going in is a new Brazilian one, the changeover went OK and it started nicely when fitted. However it only ran around 2 minutes and then died, very much like if it were starved of fuel.

I tried changing the hoses on the pump, no change. I now believe the pump isn't working. I think it ran initially with leftover fuel in the hose to the carby but is now starved.

What I didn't notice until I pulled it back out is that the old VW pump had the pump 'tongue' protruding from the bottom of the base, where it contacts with the rod from the block.

The new pump has the tongue slightly inside the case, I believe the rod isn't contacting the tongue enough to make the pump function.

I note the black rubber piece that sat under the original pump, like a large gasket between the pump and the body. Should I remove that so that the pump will make contact, or will that be too much?

Pics below.

Advice appreciated, I can't get the car to a VW mechanic currently and have to fix it at home. Thanks!


Old pump


New pump, recessed tongue, and rubber block
www.canberravw.com

Bizarre Moderator The artist formerly known as blue74l

12,785 posts · joined Aug 2002 ·

#821777
yeah - think you will find there are 2 different rod lengths

You will need a longer rod
Futue te ipsum!!!

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 ·

#821780
Yep, the angled pump (your old one) is used with the alternator which has the short pushrod. Your new pump is to suit a generator and requires a longer pushrod but wiill possibly have clearance issues if you have an alternator fitted.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

PartyHatCentral Slammed & Awesome Dubber

94 posts · joined Apr 2005 ·

#821781
No problem with fit - you will need a 108mm pushrod (your old one will be only 100mm).

phantom Wolfsburg Wizard

598 posts · joined Mar 2004 ·

#821782
Thanks all, and yes its just a genny in there.

I suppose the next question is whether the pushrod is an easy job to change? Is it fitted to the mechanicals below (and therefore need an engine pull) or does it somehow get fitted from the top?

Thanks heaps.
www.canberravw.com

barls Administrator Causer of Chaos and Mayhem

9,473 posts · joined Jun 2004 ·

#821783
they just pull straight out mate and is just a straight rod.
“We all pay for life with death, so everything in between should be free.” Bill Hicks
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matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 ·

#821785
^^^ yep, just pull the old one out (leaving the plastic spacer block), but check the new pushrod at maximum up stroke, you want 13mm protruding from the gasket.
Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE