how can you be sure the shop installed the right switch in the right place ?
Are you totally confident that they understand the high rpm switch is
the one with reverse logic ( reverse to what is normal for an OP switch ) ?

There is no substitute for a Real Oil Pressure Gauge.
Every old Mercedes always had a mechanical one.
It's the first thing you look for when firing up a small aircraft engine
, etc.

On 7/21/2016 6:38 AM, John Rodgers wrote:
> No, what I'm saying is, a brand new switch failed right out of the box. I
> supplied the new switches - and a new thermostat - to the shop. They were
> quite old, having been gifted to me when a  local VW shop closed. I was
> gifted many genuine VW parts. Though old,  but still in the original boxes,
> I saw no reason not to use them. That one switch failed. New out of the box
> failures are not new to me. I once had a new piece of avionics navagational
> gear that cost $5000 fail on the first flight after installation only 10
> minutes from the airport after departure. Frustrating to be sure. But an
> easy fix by exchanging for another new one. Took a little time to R&R the
> thing. But other than that, no problem. Same with tne switch.
>
> John
>
> On Jul 21, 2016 04:03, "Frank Condelli" <RAlanen@aol.com> wrote:
>
>>          Soooo, what you’re telling us here is that your shop rebuilt and
>> installed an engine and did not install NEW $6.95 oil pressure switches and
>> make sure the wiring to those two switches are in PERFECT condition.
>> Better tell us the shop to avoid !
>>
>>
>>> On Jul 21, 2016, at 12:00 AM, Automatic digest processor <
>> LISTSERV@GERRY.VANAGON.COM> wrote:
>>> Finnaly got the new engine installed, tested and everything seemed to run
>>> fine. Water was used for cooling while testing. Drained it out today,
>>> dragged out my bong filling devise, and proceeded to fill the system with
>>> 50/50 mix of glycol and water. Once filled, I took it out on Interstate
>> 20
>>> eat of birmingham for a test run. Couldn't have asked fo better
>>> performance. As I rxited the highway  at a cloverleave, my heart sank! As
>>> the van slowed the oil light came on with the warning horn. What tne
>> heck!
>>> There was a big grassy area in the cloverleaf, and I coasted to stop out
>> in
>>> it. I was puzzled. I waited a few minutes, then started again. Goosed the
>>> throttle up a bit, and as the rpm dropped the oil light came on again an
>>> the horn sounded. Little bells started ringing. I thought, lets try this
>>> again, but take the rpm to 3000 rpm. I started the engine, held at 3000,
>>> and the oil lighT DID NOT come on.as I let off on the gas, and as the
>> rpm
>>> hit 2200, the alarm sounded and the light came on. Aha, I thought, I've
>> got
>>> you now! Dynamic oil pressure fault. Started the engine, held it at idle
>> -
>>> no light and alarm. Push the rpm to2000 and held, still no alarm an
>> light.
>>> Increased rpm to 2500, no alarm, no light. Let off on the gas and whenn
>> the
>>> rpm dropped to 2200 the light came on and the ala3rm sounded. Definitely
>>> that dynamic oil pressure system! Drove it back to the shop at 2000 rpm
>> and
>>> under. No problem, no light, no alarm.
>>>
>>> Tomorrow it gets a new switch!
>>>
>>> Hopefully the vehicle will be ready then for the rest of it's restoration
>>>
>>> John
>> Cheers,
>>
>> Frank Condelli
>> Almonte, Ontario, Canada
>> '87 VW Westy, '00 Kawasaki 250 Sherpa, "98 Ducati 750 Monster & Lionel
>> Trains (Collection for sale <http://frankcondelli.com/trainsal.htm>)
>> Frank Condelli & Associates <http://www.frankcondelli.com/> -
>> Vanagon/Vanagon Westfalia Service in the Ottawa Valley
>> BusFusion <http://www.busfusion.com/> a VW Camper camping event, Almonte,
>> ON, June 02 ~ 05, 2016
>>