I drove a 1.9 waterboxer on which the oil light was on any time rpm was
below 1,500 , once engine was warmed up.

It did a 300 mile trip just fine though.

On 7/9/2015 12:49 PM, Stuart MacMillan wrote:
> I prefer the cam location simply because knowing the pressure there is the most critical.  Oil pressure leaks down at the bearings, and this measures it at the bearings.
>
> Full oil pump pressure is delivered to the filter/sandwich plate, so you will likely see a somewhat higher pressure there as the engine wears, as compared to the bearings, but probably not much higher.
>
> The important thing is to watch the long term trend of the pressure drop, which is inevitable.  When you get below 8 psi at hot idle and 20 at 3000, start saving for a new engine.  Six psi at idle and you are on borrowed time.  BTDT-my experience with a used 2.1 engine:
>
> OIL PRESSURE: 8 psi at idle, 24 psi cruising when installed. Over the next 10,000 miles pressure steadily dropped to 4 psi idle, 12-15 psi cruising. At the end of the 3000 mile trip idle pressure was zero (red light came on), cruising 8 psi. Blew up at 65 mph just 65 miles from home, still running strong!
>
> I'm hoping for one more year from my current 1.9 with the same initial oil pressure.
>
> Stuart
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of John Rodgers
> Sent: Thursday, July 09, 2015 2:25 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Oil pressure
>
> I've got two oil pressure guage setups. One takes pressure from the pressure switch that monitors oil pressure at the cam. No oil temps. It has a pressure guage only. The other is a sandwich device that takes oil pressure and temperature between the oil filter and oil cooler. Of these two, which would be best. Opinions? Why?
>
> Thanks,
>
> John
>