What Is This Part?

BampaBus · Posted: Tue Oct 26, 2010 5:41 am Post subject: What Is This Part?

'73 Bus, 1700 engine.

This will be simple for everyone but me. What exactly is this part? I'm guessing oil pump maybe? Bentley shows something similar, but no location. Just an exploded view away from the engine.

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Location is passenger side, toward front of vehicle. Underneath.

My problem is it is leaking oil. I can't tell if it's from the seam, or from that tube that sticks out the bottom. I tightened the 6 screws at the seam that shows oil but it still leaks.

Is there a seal kit?

Should that tube have some sort of hose on it? Why is the tube there?

If I remove it to reseal, will it dump out all my oil?

Thanks, as usual.

hazetguy · Posted: Tue Oct 26, 2010 5:45 am Post subject:

it's a fuel pump.
there are gaskets you can replace.
more info here:
http://www.thesamba.com/vw/forum/viewtopic.php?t=415986
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raygreenwood · Posted: Tue Oct 26, 2010 5:46 am Post subject:

It is the original fuel pump for twin carbs. The curved tube was a vent tube. Yes, you can remove it and fit a solid metal plate over the hole. Ray

volksterii · Posted: Tue Oct 26, 2010 5:48 am Post subject:

Fuel pump. Sounds like it needs a new gasket at the base.
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hazetguy · Posted: Tue Oct 26, 2010 5:50 am Post subject:

BampaBus · Posted: Tue Oct 26, 2010 6:46 am Post subject:

Okay, makes sense. I assume it is mechanically driven by something inside the engine?

So, if I remove it to cap it or install new gaskets, I should expect to lose some oil?

Not a big deal, just want to know what to expect.

I'd prefer to leave it there instead of cap it. Are gaskets available somewhere, or I should make my own?

raygreenwood · Posted: Tue Oct 26, 2010 7:42 am Post subject:

hazetguy · Posted: Tue Oct 26, 2010 9:45 am Post subject:

Wildthings · Samba Member Joined: March 13, 2005 Posts: 50331

I certainly wouldn't leave a leaky fuel pump in place if I wasn't intent on using it. Leaving unused stuff in place just makes it harder for the next owner to figure out what the heck is going on.

I guess someone could solve the question of how much oil is lost through the pushrod sleeve by running a tiny boroscope down the tube and seeing the size of the drilling into the end of the oil galley. There must be some pressure that builds up in that area or the fuel pumps wouldn't tend to leak much if ever.

BampaBus · Posted: Fri Oct 29, 2010 6:19 pm Post subject:

Finally had some time to inspect this closely. Put the bus up on a jackstand on that right rear wheel and pulled the tire. Crawled under it and cleaned up everything thoroughly. Then ran it a while. The oil leak is at the base of the drain/overflow tube.

That doesn't make sense, at least to me. I thought it was for fuel overflow. Oil leaks out?

Any good way to seal it without removing and capping the entire assembly?


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