You have indicated  you have reached 1300 miles on this rebuild. Change
the oil to 20W50, and install a new filter. If you still have problems,
you have something wrong with your fits and clearances inside most
likely. This would require a teardown and re-check with micrometer and
dial indicator of those fits and clearances to see if they are in tolerance.

Regards,

John Rodgers
88 GL driver

Marshall wrote:

> K, here's the deal.  I recently (1300 miles ago) rebuilt a vanagon engine
> that was non-working(a head had died).  Anyway, after throwing $1000 into
> parts, got it running.  however, it's operation is erratic.  300 miles
> after an oil change, the high rpm oil sensor starts going off every
> once in
> a while (mainly, when decelerating and hiting 45 in 4th gear).  I finally
> installed an oil pressure gauge, so i could monitor it.  Turns out the
> idiot light is correct, i have no oil pressure.  BUT, here's the
> kicker.  I
> installed a fresh oil pump with the rebuild.  It doesn't leak any
> oil.  It
> doesn't burn any oil.  I've tweaked with everything trying to get this
> thing stable, even the pressure relief valve.  Any ideas of what may be
> happening?
> Marshall
> 86 vanagon
>