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Improved Cooling for your Porsche--Cheap!

Pelican Technical Article:

Improved Cooling for your Porsche--Cheap!

Bob Tindel

Applicable Models:

Porsche 911 (1965-89)
Porsche 912 (1965-69)
Porsche 930 Turbo (1976-89)
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6

UPDATE: Cool Collars are no longer available.The entire product line has been discontinued by the manufacturer.

     Pelican Parts has introduced a new item that will improve cooling on almost any engine that has an external oil filter-it is one of those products that makes you say, "Why didn't I think of that?"  The "Cool Collar" is a finned aluminum jacket that slips over the oil filter (Figure 1) It is secured by a clamp to the outside of the filter, which provides full surface contact and allows maximum heat transfer.  Considering that all of the oil in your Porsche goes through the filter more than once a minute at freeway speeds, the oil filter is an excellent location to add cooling capacity.  Bench tests, as well as road tests on both water- and air-cooled engines, have demonstrated oil temperature reduction of 18 to 23 degrees with the Cool Collar.  This is a tremendous cooling improvement for a very small expenditure, and a few minutes' work.

     At first look, it appears that the Cool Collar cannot be installed with the AC compressor in place (Figure 2).   However, the installation is very easy.  Remove the clamp from the Cool Collar, and place the split in the collar over the top AC hose (Figure 3).  Now rotate the collar, and pull it downward off the hose into the open space next to the oil filter (Figure 4).  Slip the collar onto the oil filter, and push it until it seats against the filter mount (Figure 5).  Secure the collar with the clamp provided, and you are done (Figure 6).  Be prepared for hot weather, high-performance driving, and prolong the life of your engine.  Also be prepared for some "whatthehellisthat" questions whenever you open the engine compartment.


From the Manufacturer: Cool Collar Lab Test Results:

Test Results Laboratory Test

     Castrol GTX 10W30 motor oil was heated to a temperature of 220 degrees F. and pumped simultaneously through two identical oil filters.  One oil filter had a Cool Collar attached, the other did not.  A fan was used to direct seventy degree F. ambient air over both oil filters at a velocity of fifty miles per hour.  The oil exiting the filter having the Cool Collar installed indicated a h eat removal approximately equal to two degrees per minute. Whereas the oil temperature exiting the filter without the Cool Collar showed no change.  (Typically an automotive engine passes all the oil through the filter more than once per minute).

     Summary: With a constant heat source applied to the oil, the temperature dropped to 202 degrees F (from 220 degrees F.) with five minutes.  This translates to a 12% temperature decrease of the heat added to ambient temperature.

Liquid Cooled Automotive Engine (Road Test)

     This test was an actual highway test.  The car used was a late model Corvette equipped with digital readout oil temperature and coolant temperature gauges.  On a 72 degree F. day, at 65 miles per hour, the oil temperature read a constant 221 degrees F.  The water temperature was 195 degrees.  The corvette was then pulled off the road and a Cool Collar was installed.  Testing was then resumed.  Within a distance of five miles the Cool Collar was responsible for lowering and maintaining the oil temperature at 203 degrees F.

     Summary: Our tests again indicated a 12% approximate reduction above ambient temperature of oil heat.  On similar testes, it was found that after installation of the Cool Collar the oil temperature will typically drop near to the level of the engine coolant temperature.

Air Cooled Engine (Road Test)

     The test vehicle used was a 1978, 911SC Porsche, equipped with a Carrera style oil cooler.  The car was driven 65 MPH on a 85 degree day for approximately 35 miles.  The car was then stopped and a I.R. thermometer was used to check the temperatures at various points along the oil lines, tank and cooler.  In addition, the reading on the dash temperature gauge was noted.  An average temperature of 220 degrees was logged.

     Testing was then resumed, with the Cool Collar installed on the oil filter, over the same coarse and speed.  At the end of the 35 miles the temperatures were then checked again using the infra-red thermometer at the same points as before.  The indicated temperature readings showed an average reading of 208 degrees, a reduction of 12 degrees.

Comments and Suggestions:
Herb Comments: Wayne, There's a company called Airwolf that makes remote oil filter kits for aircraft and they also make these devices. They call it an Airwolf Oil Chiller. I bought one for my plane several years ago when they were smaller and looked just like the one you used to carry, but it was too big to fit on the 914. The one they sell now can be viewed on Aircraft Spruce's website. They're just down the road from you in Corona.
January 28, 2012
  Followup from the Pelican Staff: Thanks for the additional Info. We appreciate it.
- Nick at Pelican Parts
Ray1051 Comments: Why do you think this product would no longer be available if it worked so well? Was there a problem with this cooler that poople are unaware of?
November 29, 2011
  Followup from the Pelican Staff: Most likely due to demand. - Nick at Pelican Parts  
Flyer5 Comments: Is there any way to get one of those cool collars for my oil filter for my car?
October 25, 2011
  Followup from the Pelican Staff: Looks like they might still be available. Check with the company Airwolf in Corona. - Nick at Pelican Parts  
AH64ID Comments: I would really like to buy 3 of these for use on my truck. Will the be available again soon?
January 14, 2011
  Followup from the Pelican Staff: Looks like they might still be available. Check with the company Airwolf in Corona. - Nick at Pelican Parts  
Therma-Cool Cool Collar in the US Comments: Hello, I am the Australian distributor of these great coolers. I have 3 inch coolers in stock. Would you like more info? Please email me at
January 9, 2011
  Followup from the Pelican Staff: Thanks for the additional Info. We appreciate it.
- Nick at Pelican Parts
Neil Comments: I could make these if there is a demand Email me at
December 24, 2010
  Followup from the Pelican Staff: Thanks for the additional Info. We appreciate it.
- Nick at Pelican Parts
fandango racing ltd Comments: do you have a 3" bore cool collar laying around for sale. Hidden behind the... or under the... or used to prop the door open?
June 19, 2010
  Followup from the Pelican Staff: Sorry, no. These have been unavailable for quite some time now. - Wayne at Pelican Parts  
Steve Comments: Hi ,
Any news on these cooling collars ? Are they available ?
Regards ,
Steve .
April 25, 2010
  Followup from the Pelican Staff: Still not available at this moment, we're working on it. - Wayne at Pelican Parts  
Husky kid Comments: Have you guys found a sourse for them anywhere?
April 20, 2010
  Followup from the Pelican Staff: I would check the forums for an update. - Nick at Pelican Parts  
John Comments:
October 30, 2009
  Followup from the Pelican Staff: Thanks for the additional Info. We appreciate it.
- Nick at Pelican Parts
Bruce Comments: Your tech page on the cool collar extolls their virtue.
However I can't find where/how to order.
Please forward link
September 29, 2009
  Followup from the Pelican Staff: Bruce, the cool collar is no longer being produced. We are currently looking for another supplier at this time. - Wayne at Pelican Parts  
addictedtoporsche Comments: Where can I buy one of these cool collars in 2009?
May 18, 2009
  Followup from the Pelican Staff: Sorry, it seems that they are no longer available. We're trying to find an alternative source. - Wayne at Pelican Parts  

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Page last updated: Mon 1/15/2018 02:28:01 AM