How do [external] oil coolers Work?

[fahrvegnugen at cox.net (David Utley)]

> 
> From: "Dick Y Wong" <sailingfc@dslextreme.com>
> Date: 2004/08/24 Tue AM 02:18:30 EDT
> To: "Camron D. Crouse" <camron@worldaccessnet.com>
> CC: scirocco-l@scirocco.org
> Subject: RE: How do [external] oil coolers Work?
> 
> 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

I think your concern is possibly well waranted, however I feel am having trouble with a few things.  150 psi for a solid lifter motor, or a hydraulic motor seems high to my minds eye, but I cannnot say for certain.  I have a solid lifter motor that, like a dummy, I put a hydraulic oil pump on.  I have no idea of what pressures it would therefore produce (other than too high), and I have not had ANY hint of leaks at all with my system.  This Euro oil cooler setup has rubber hoses that are much like AC hoses, so I don't think the factory would put those out without doing considerable R & D...

No offense, just my .02...

Cheers,
  David


> 
> -----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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