Date:         Thu, 14 Mar 2013 12:18:43 -0500
Reply-To:     mcneely4@COX.NET
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dave Mcneely <mcneely4@COX.NET>
Subject:      Re: '87 Westy - Oil Change, out of hibernation
Comments: To: OlRivrRat <OlRivrRat@COMCAST.NET>
In-Reply-To:  <68658BD9-C350-4A63-BB33-8AD71F03C458@comcast.net>
Content-Type: text/plain; charset=utf-8

Well, the question was, "What is too much oil pressure in a waterboxer?"  So, I repeat the question:  What is too much oil pressure in a waterboxer?  Is it 65 psi, 70 psi?

On startup, cold, 20W50 Castrol (I hate the company, but use the oil because I can't seem to find a better, and will not pay for synthetic for an engine that is supposed to run on non-synthetic oil), the OP on my 1991 Volkswagen Vanagon GL Campmobile with 2.1 with 170K miles runs at 60-70 psi depending on how cold it is.  At home I garage it, and ambient temperature is usually around 50 F in winter.  But then I park it outside when away from the house.  But it has never pegged the 0-80 psi gauge.  The pressure usually drops to 40 psi quickly as the engine warms up and holds around there.  Summer is another matter, it usually drops to around 30 psi but will go lower on on long runs under hot conditions.  I switch to 40W for about 3 months.

So far as low OP, I don't see a problem there, except at idle it may drop to 10 psi or a tad lower after long hot runs.

How much OP is too high??

mcneely

---- OlRivrRat <OlRivrRat@COMCAST.NET> wrote:
>         If I saw a 10PSI drop or even a 5PSI drop in HotOP from 15w-40 to
> 10w-40 or even 0w-40 I would Kiss that OilManufacture Goodby in a
> HeartBeat.
>
>                                                                         ORR ~ DeanB
>
> On 14 Mar , 2013, at 8:52 AM, Don Hanson wrote:
>
> > So, what is "too much" oil pressure in a waterboxer?  mcneely
> >
> >
> > And, what is too much oil pressure in an inline VW motor?  (ABA
> > Jetta 2.0
> > liter)
> >
> > Mine, using 15-40 starts up cold with (3000rpm) 75-80psi, then when
> > up to
> > normal oil temp (~200f) the pressure settles at around 60-65psi
> > (again,
> > given a 3000rpm engine speed)  I've wondered about the seemingly
> > pretty
> > high cold oil and engine oil pressure...
> >
> >   After hard use on a hot day, my idle OP sits at about 25psi with the
> > 15-40w oil.    When I use 10-40 or 10-30, I see about 10psi lower at
> > speed
> > and a few psi lower at idle when hot.

--
David McNeely