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1997 Boxster cooling system tool specifications.

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I am buying a cooling system pressure checking tool to keep in the shop.The one I saw is made by Stant. I saw technician using it on cable television "Tech Garage". show  .It looks straight forward  to operate. The issue is what adapter to buy that would fit the coolant tank.There are many to choose from. The tool also checks coolant reservoir cap. Thanks for your help.

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We have used the Stant pressure testing system for many, many years; well made and they are constantly adding new adaptor's.  The one to fit your Boxster is actually listed as a VW unit, part number 12016, Amazon sells them :



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Thank JFP.  I just got off the phone with Pedro from Pedro"s Garage.He just told me to get the Maddox brand with many fittments from Harborfreight which has it for 79.99 and with 20% off and a $10 giftcard ,it's costing 54.The picture I'm sending is the new nose I did during pandemic and recovering from cancer.Hope you like it


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2 hours ago, boxstermuscle said:

I didn't buy anything just yet. The Maddox does not include the 48mm adapter that you so kindly sent me a picture of .I am no rush.Oh yea,,the Maddox I was thinking of uses shop air which makes it cheaper and also made in Texas.



I think you are mixing things; The air powered Maddox cooling system tool is for filling the system under vacuum.  While it will indicate the presence of leaks as a loss of vacuum, it is not useful for locating them, for that you need to be able to pressurize the system to its rated level, and then look for wherever coolant is coming out.  This can be accelerated by adding a UV dye to the coolant, which will glow when hit with UV light, a common shop procedure.


As for where Maddox tools are made, Maddox tools is one of many registered trademarks of Harbor Freight (details here: https://trademarks.justia.com/870/58/maddox-87058197.html)  I think the Maddox you are thinking of is Maddox Metal Works, Dallas, which produce equipment for the food processing, aerospace & defense, oil field & steel mill equipment and other industries (http://www.maddoxmetalworks.com/aboutus.htm).  As for where Harbor Freight sources their tools, they state "All of our tools are designed and built in partnership with the same factories that many of our top leading competitors use."  In reality, if you order three or more of these tools from HF, you get a complimentary order of Dim sum. 😱

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  • 2 weeks later...

Hi JFP,   I took your advice obtaining the necessary adapters for my Stant TC255.I got them at Amazon.I bought the 12016 and the 12017 adapters.The 12017 allows me to check the coolant cap.I did get the best price from Amazon.  Thanks Again.   Tom


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