Check the oil pressure releif valves. One maybe stuck in opened.
They are located on the bottom of the engine.

            Eric                   86-VW4x4
            vw4x4@fyi.net          72-240z
            Pittsburgh, PA USA     1936-Chrysler

On Mon, 5 Jul 1999, John Scheckel wrote:

> Well this weekend, just for fun, I decided to change the pistons on my
> '87 wolfsburg.  all went great until I started the beast.  It started
> fine, however, the low pressure oil light came on and refused to go
> out.  I would dearly appreciate comments from the list of obvious
> problems that I may have overlooked.
>
> What I did so far:
> checked all wiring for continuity, its good
> checked the switch for proper grounding, it grounds between the
> connector and the body of the sender.
> cleaned out the sender, didn't see anything in it and didn't see
> anything come out when cleaned.
> Checked all connections in th eengine compartment, they are good.
>
> While I rebuilt, I didn't touch the sender, just disconnected it.
> Previous to rebuild oil pressure sender worked fine.
>
> Anxiously awaiting any reply, even the humorous, ('cause it would come
> in handy just now).
>
> tia.
> John S
>