Coolant Temp/Syn Oil

[fahrvegnugen at cox.net (David Utley)]

*shrug*  I dunno then.  I have done this twice over the years, and the car
did not feel as responsive, and I lost about 1 mpg.  Not a big change, but I
couldn't help but feel that I went backwards with the improvements...

With -higher- temps, you increase the ability of an engine harness all the
power from the gas it burns as it will then burn that much more violently...
Look here...

http://www.evanscooling.com/html/tech1.htm

The information on their web page is nebulous, but there is good info to be
found...

>From the site--Evans NPG Coolant and related components are designed with
the ability to reduce hot spots while raising the coolant boiling point and
decreasing the volume of vapor generated when compared to typical ethylene
glycol / water (EGW) mixtures.  Race car testing has shown that even if
forced to operate at up to 300? F, detonation control and previously
forbidden combustion pressures and temperatures are no longer the danger
they were to thermal engine efficiency and durability.


This obviously does not reiterate my idea, but it would stand to reason if
what they say is true...

David

-----Original Message-----
From: scirocco-l-bounces+fahrvegnugen=cox.net@scirocco.org
[mailto:scirocco-l-bounces+fahrvegnugen=cox.net@scirocco.org]On Behalf Of
Peter
Sent: Sunday, July 10, 2005 12:47 AM
To: scirocco-l@scirocco.org
Subject: RE: Coolant Temp/Syn Oil

From: David Utley [mailto:fahrvegnugen@cox.net]
IMHO, I would rather know the cause as opposed to fixing something that was
not, or should not be broken.  A low-temp fan switch (in my experience)
kills economy and power...
David

LOL, I never heard that one before...

The cause, is most likely a corroded terminal (as mentioned in my 1st reply)
on the rad fan switch, and the connector, or just a bad switch.

When I first bought my '88 16V, the temp gauge needle would be just over the
LED, when driven hard, and the engine would slightly ping.
I installed a low temp fan switch, which stopped the pinging, and the needle
never went past the LED.

...That Wednesday engine and low temp fan switch is now in my '79 Scirocco,
and there is no loss in power, or gas mileage.

>From a Saab website, http://www.quasimotors.com/coolfan.htm:
The following tells how to check the cooling fan system, both for basic
operation and detailed troubleshooting, in case the operational check shows
that one of the fan speeds isn't working.  If the operational check shows
that both fan speeds are working, the best thing to do (and the one thing
that fixes most people's cooling systems) is to buy and install the lower
temperature fan switch.  Replacing the thermostat is also a good idea.  A
lower temperature thermostat is available but I don't recommend it except in
extremely hot environments because, coupled with the lower temp switch, the
engine will actually run too cool.

http://www.quasimotors.com/cooling_fan_ops_check.htm :
Run the engine at idle and make sure the fan comes on before the temperature
gauge goes past the halfway point (this assumes that you have the lower
temperature fan switch, which you should have).


Check your terminals Dan, I bet at least one terminal is corroded.

Btw, the rad fan switch usually only closes at idle, or stop and go traffic.

Peter
http://thescirocco.com/

Please! Include the previous text in your reply...


>
> From: "Peter" <peter@thescirocco.com>
> Date: 2005/07/08 Fri PM 07:09:31 EDT
> To: "'daniel savatteri'" <yoscirocco@hotmail.com>
> CC: scirocco-l@scirocco.org
> Subject: RE: Coolant Temp/Syn Oil
>
> Hey Dan,
>
> Try a low temp fan switch, and/or check the terminals for corrosion.
> The rad fan wiring is right below the battery, and prone to corrosion.
>
>
> Peter
> http://thescirocco.com/
>
> Please! Include the previous text in your reply...
>
> -----Original Message-----
> From: scirocco-l-bounces+peter=thescirocco.com@scirocco.org
> [mailto:scirocco-l-bounces+peter=thescirocco.com@scirocco.org] On
> Behalf Of daniel savatteri
> Sent: Friday, July 08, 2005 12:38 PM
> To: Scirocco-l@scirocco.org
> Subject: Coolant Temp/Syn Oil
>
> So I started using Moble 1 15w50 in my 16v.  My highway cruising
> coolant temp has risen to above the led on the gauge (needle just clears
the LED).
> Goes back to normal when sitting still. The strangest thing was that
> when I put the A/C on the coolant temp drops to normal (needle
> directly on the LED) when cruising. This is the same viscosity oil I
> use in the Castrol GTX which I've never had a problem with for years.
> I know synthetic oil is slightly thinner than reg oil but that
> shouldn't be the culprit. Coolant level is correct and is relatively
> new, I do need a new battery and am suffering long cold starts because
> of the battery.  I'm stuck, need advice from the almighty list. Please
Help!
>
> Dan Savatteri
> Black MK2 16v
>
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'83 GTI, Daily Driver...
'87 16V, parts car
'82 pickup, 2.0 16V, collecting dust...





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