Date: Tue, 1 Oct 2002 08:14:21 -0600
Reply-To: Ben McCafferty <ben@KBMC.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Ben McCafferty <ben@KBMC.NET>
Subject: Still doesn't add up, was: Re: [Syncro] Oil pressure mystery,
resolved???
In-Reply-To: <15769.39516.534547.293238@hpwk.rrze.uni-erlangen.de>
Content-type: text/plain; charset="US-ASCII"
OK, Bentley says the low pressure switch (between cyl 3 and 4) is .3 bar, or
4.4 psi. The high pressure switch (near the oil pump) is .9 bar, or 13.1
psi. This is all on page 17.7. If that's true, my situation of 20 psi at
2000 rpm still satisfies both pressure requirements, either just above or
just below the magic 2000 rpm.
However, on page 17.9, in the test procedure for the oil pressure switch,
the manual says "at 2000 rpm, pressure should be minimum 2.0 bar (29 psi)".
So I still feel like I'm missing something. If the requirement is 29psi,
then my oil pressure switch should be setting off the light/buzzer a LOT
earlier, because it doesn't do anything until 20 psi, and rarely at that.
If the requirement is 4.4 or 13.1 psi, there's a ghost in the machine,
because the engine never runs below 20 psi at 2000 rpm, and usually higher
than that.
Also, as background info, it's a 2.1l WBX, Canadian factory rebuild, with
about 50K on it, almost all highway. When the light/buzzer goes off, all I
have to do is depress the clutch and nudge the gas to make the light/buzzer
go away. If I don't downshift, (i.e. change the running condition), the
light/buzzer will come back on.
????
bmc :)
"Faith will move mountains, but you'd better bring a shovel...."
> From: "Dr. Rainer Woitok" <WOITOK@RRZE.UNI-ERLANGEN.DE>
> Organization: RRZE (Regionales Rechenzentrum Erlangen)
> Date: Tue, 1 Oct 2002 14:51:40 +0200
> To: Ralf Kleineisel <ralf@kleineisel.de>
> Cc: VW Syncro mailing list <Syncro@yahoogroups.com>
> Subject: Re: [Syncro] Oil pressure mystery, resolved???
>
> Hi Volks,
>
> On Tuesday, 2002-10-01 08:44:22 +0200, Ralf Kleineisel wrote:
>
>> David Marshall wrote:
>>> There are two senders 0.3 and 1.8 BAR - both are used with the 'idiot
>>> buzzer'.
>>>
>>> - If the RPM is over ~2000 RPM and the pressure is not 1.8BAR the buzzer
>>> will sound.
>>> - If the RPM is under ~2000 RPM and the pressure is not 0.3BAR the buzzer
>>> will sound.
>>
>> There are different senders for different diesel engines. The 0.3 Bar is
>> the one at the front end of the cylinder head and ist AFAIK the same
>> for all diesels. The plastic insulator is blue.
>> The other sender is located at the oil filter flange. There are
>> different ones. The 1.6 D (and 1.7 D?) engine has a black one which
>> closes at 1.8 or 1.9 Bar (I'm nor sure). The 1.6 TD engine has a grey
>> one which closes at 1.4 Bar.
>
> Just to add to this list: on both, DJ and MV engines the two oil
> pressure sensors are supposed to fire at 0.3 bar and 0.9 bar
> respectively.
>
> Sincerely
> Rainer
>
> '89 Caravelle GL Syncro 16"
>
> ----------------------------------------------------------------------
> | Rainer M Woitok | Phone: (+49-9131) 85-27811,-27031 |
> | Regionales Rechenzentrum | |
> | Friedrich-Alexander-Universitaet | Fax : (+49-9131) 30 29 41 |
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> | D-91058 Erlangen | |
> | Germany | Mail: Woitok@RRZE.Uni-Erlangen.DE |
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