How do [external] oil coolers Work?

[camron at worldaccessnet.com (Camron D. Crouse)]

Camron D. Crouse wrote:

>
>
> 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
>

Addendum: New Dimensions kit: US$309.99 
<http://www.ndimports.com/01_vol/00_shop/index_05.html>