How do [external] oil coolers Work?

[sailingfc at dslextreme.com (Dick Y Wong)]

I have a system that utilizes the braided lines.  For a solid lifter engine,
the cold start up oil pressure can easily reach 150PSI.  This can blow off
rubber hoses and hose clamped fittings.  Don't know what the cold oil
pressure is for a 16V.

-Dick-
78 Scirocco
Original Owner
95 Passat
Second Owner



-----Original Message-----
From: scirocco-l-bounces@scirocco.org
[mailto:scirocco-l-bounces@scirocco.org]On Behalf Of Camron D. Crouse
Sent: Monday, August 23, 2004 10:37 PM
Cc: scirocco-l@scirocco.org
Subject: Re: How do [external] oil coolers Work?




Rick Kellner wrote:

>Many of the components discussed can be found at the following site.
>
>
>http://www.volkswagencountry.com/empioilsys.htm
>
>Rick.
>
>
>
>The first one (liquid to liquid) uses engine coolant running in and out
>of
>the two pipes.  In steady state running, the coolant is cooler than the
>oil and therefore heat is transfered from the oil to the coolant.  This
>setup is more compact than the external setup, but requires running
>additional coolant lines if the plumbing isn't already there.  One
>advantage is the engine warmup time is reduced due to the transfer of
>heat
>between the cooling and oil systems.  One disadvantage is the cooler can
>corrode and mix the two fluids.
>
>The second system (air to liquid) uses air to cool the oil.  Oil runs
>through the sandwich adapter plate to the cooling radiator and air
>traveling through it extracts the heat.  This system is more efficient
>at
>extracting heat because there is a greater differential in the
>temperatures of the oil and air.  Because this system uses air for
>cooling, it's a good idea to have the thermostatic adapter to control
>oil
>flow to the cooler until the oil is up to temperature.
>
>I prefer the air to liquid system.
>That's it in a nutshell.
>
>-Dick-
>78 Scirocco
>Original Owner
>95 Passat
>Second Owner
>
>
>Neptuno
>
>
>>There has been much talk on this list at different
>>time about buying and instaling external oil coolers
>>from volvos and sanwdish style oil coolers from GTI's
>>and so fort, but how do tghis things work? DO they all
>>work the same? Some seem to be coolant cooling oil and
>>others seem to be oil coolers getting cooled by a
>>radiator type cooler. Is that right? ARe there more
>>than one way to cool the oil?
>>
>>Here is that sandwish plate one
>>
>>
>>
>http://vw-parts.drivewire.com/buynow-vw/water-cool/oil-cooler~pgn1~pcd34
>78.html
>
>
>>Here is the external version(the one Im most confused
>>over)
>>http://www.gprparts.com/brands/gprOilCoolerKit/
>>
>>TIA
>>tony
>>
>>
>>
I am also interested in an external oil cooler/oil thermostat kit, for
my 2.0 16V  I am running the Evans NPG+ waterless coolant
<http://evanscooling.com/main25.htm> and Dyson Synergyn 15w-50 Synthetic
oil, and during bumper-to-bumper rush hour traffic my engine temps get
quite high.  Oil temps 250+ degrees F, and coolant guage above 3/4 hot.
My temp guages ran much cooler when I had regular antifreeze/water in
the cooling system, but I prefer the noncorrosive nature of the Evans.

David U., I know you have spoke highly of running an external oil
cooler... what do you recommend?  Anybody else have opinions?  Here's
what I have been made aware of:

Autotech/Setrab kit: US$419.95 SS Braided hose / US$389.95 Poly hose
<http://www.autotech.com/catalog/oilsys.htm>
GPR Oil Cooler kit:  US$189.00
<http://www.gprparts.com/brands/gprOilCoolerKit/>
Volkswagen Country kit: up to US$109.76
<http://www.volkswagencountry.com/empioilsys.htm>

Quite a stratifiaction in prices.

Thanks


- Camron from Vancouver, WA USA
   '86.5 Black 16V 2.0L






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