Date: Mon, 28 Jul 2003 23:40:29 -0700
Reply-To: Robert Keezer <warmerwagen@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Robert Keezer <warmerwagen@HOTMAIL.COM>
Subject: Re: vanagon Digest - 27 Jul 2003 (#2003-764)
Content-Type: text/plain; format=flowed
I also had a lifter prime problem when I did my first conversion, not
realizing that the pick-up tube had a pressure relief valve.
I pulled the oil pan off, and removed the pressure valve plunger- polished
the bore and the plunger, and reassembled. That was the end to the lifter
noise and oil light on at start up.
I am changing my pump tomorrow since I have the engine out to do a clutch
job, I might as well change this.
When you got a new pump, it's possible you got half a new pump, the top part
with the gears for a 1.8 gas, and the bottom part the Diesel pick up tube.
As Mark said it is used and not new, the pick-up tube.
Otherwise a new pump would mean two new pumps, with only the needed half of
each one used, since the Diesel shaft is too long, and the gas inline-four
pump pick-up tube can't be used on a Diesel conversion.
Also, the pick-up tube pump gear surface if deeply worn should be resurfaced
before using - low oil pressure can be the result of a worn surface.
Y
There are two dimensions of pump gears- 26 mm and 30 mm . If you have the
26 mm, switch to the higher volume pump.
This helps a lot on the I-4 since it takes a few seconds less for the oil to
reach the bearings and lifters using the high volume pump.
The high volume pump is just that, it flows more oil- even the pressure
relief valve plunger is bigger.
Robert
1982 Westfalia
1986 Westfalia
1991 Syncro
----Original Message Follows----
From: mark drillock <drillock@EARTHLINK.NET>
The 50 degree mount angle requires a diesel Vanagon oil pan AND oil
pickup tube. I assume the mechanic knows this and is using the right
stuff. If he is using a used diesel Vanagon oil pickup tube then that is
the likely problem. The oil pressure relief valve is built into the
pickup tube. If it came from an engine that failed small bits of engine
debris may be jamming the relief valve in a partly opened position and
then the oil pump sucks air at low rpms. The oil pan must be removed and
then the pickup tube can be removed for close inspection. I have seen
this problem twice.
Mark
Dominic & Diane Fraser wrote:
>
> Hello, I hope someone can lend a hand, I/we are baffled:
>
> I just got my van back from it's conversion to a GTI 8v at 50 degrees,
and
> am generally pleased, but it has a more than annoying problem in that
every
> other start, it won't build up oil pressure!
>
> If I rev it to 3500, it gets the idea, and oil pressure comes back, but
at
> idle it just sits and flashes..... this motor can't last long at this
rate.
>
> Mechanic put in a new oil pump and camshaft (probably siezed from no oil
> pressure). He doesn't know what to do either... there appears to be no
> reason for this to happen 2/3 times a day.
>
> I don't know what to do now: please help!
>
> Thanks for any clues, it's much appreciated.
>
> Dominic Fraser
>
> >
Robert
1982 Westfalia 1987 Wolfsburg
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