Date: Sat, 1 Mar 2014 22:55:15 -0500
Reply-To: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject: Re: Oil pressure warnings, WAS: Mann Oil Filter and lifters
In-Reply-To: <5312A6F5.9060301@cox.net>
Content-Type: text/plain; charset="US-ASCII"
I think some are missing the main point of the dual oil pressure warning
system. The low pressure switch is activated at around 3 psi. On the
Waterboxer the high pressure switch is ~12.6 psi. On the inline engines the
high pressure switch is ~ 25 psi. Having only the low pressure really means
that at speed it is no longer an oil pressure warning indicator but a
replace engine indicator. Unfortunately the engine would let you know
something was wrong by the strange noises, loss of power, the sudden smoke
screen as a rod exited the case.
If your engine can't maintain 12.6 psi at 2,000 rpm you do have a problem.
Now with the water boxer it is possible to get the oil so hot that the
viscosity drops to the point that you will get the buzzer and there may be
nothing wrong except for that high oil temp. However that is still not a
healthy situation over the long term. If your driving style or needs are
such that this is problem then a good fix is a well-designed oil cooling
system. I am convinced that the oil cooler is the main reason I have had
such good luck with the engine in Fun Bus.
Dennis
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
mark drillock
Sent: Saturday, March 1, 2014 10:35 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Oil pressure warnings, WAS: Mann Oil Filter and lifters
I think the biggest improvement was making the oil warning led a blinking
warning to better get the driver's attention. The second oil switch I agree
is of debatable value except it allowed for a loud warning buzzer to be
added to really get the driver's attention while driving. I might be happier
with just a 1 switch setup if it was combined with a buzzer that triggered
whenever the warning light came on while the engine was running. An oil
pressure gauge is not a viable substitute for a warning light but does its
uses as an additional item though I know of many people who added one only
to have IT be the source of trouble.
Mark
Stuart MacMillan wrote:
> Interesting. But what's that good for other than causing anxiety?
> Without a gauge to monitor pressure under various conditions it's
> completely useless IMHO.
>
> Stuart
>
> -----Original Message-----
> From: mark drillock [mailto:mdrillock@cox.net]
> Sent: Saturday, March 01, 2014 4:36 PM
> To: Stuart MacMillan; vanagon@GERRY.VANAGON.COM
> Subject: Re: Mann Oil Filter and lifters Was:Engine Starting Problem
>
> This supposed correlation of the new dynamic oil warning system with
> some weakness in the 2.1 ignores the fact that VW began fitting the
> more complex dual oil switch system to all their vehicles in roughly
> the same time frame. The major makeover to the electrical system
> beginning in 86 Vanagons was merely a convenient point in time to also
> add the same modernized oil warning system that many of their other
> cars got the year before.
>
> Mark
>
>
>
> Stuart MacMillan wrote:
>> .....
>> If you want to really know what's going on with your engine and
>> bearings, install an oil pressure guage. Ignorance is not bliss with
>> waterboxers, especially with the 2.1s! VW knew this, and that's why
>> they installed two pressure sensing systems. .....
>
>
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