03-02-2019, 06:31 AM
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#21
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Registered User
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,954
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Quote:
Originally Posted by JFP in PA
Sure, you could use it on any car, you just need to make sure the oil fill cap is the same, or like we do, have multiple cap "adaptors" for different cars.
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Thanks JFP it makes sense, I will buy a new oil cap for the 981 and make a new adapter.
Does the vacuum value (5" of water, or less) remains the same for the M97A1 engine as well? Thanks again!
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03-02-2019, 06:38 AM
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#22
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,553
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Quote:
Originally Posted by Gilles
Thanks JFP it makes sense, I will buy a new oil cap for the 981 and make a new adapter.
Does the vacuum value (5" of water, or less) remains the same for the M97A1 engine as well? Thanks again!
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Yes, they are pretty much the same. What you are looking for is the “steady state” (read fully warmed up engine) reading. Typically they run in the 4-5 inches of water range; anything above 6-7 is a failing AOS, and no vacuum or slight pressure is also a separate failure mode. This is why any serious “back yard” water cooled Porsche wrench should have one of these manometers, the test is a quick and deadly accurate diagnostic tool.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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03-03-2019, 08:46 AM
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#23
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Registered User
Join Date: Dec 2009
Location: Orange County, CA
Posts: 1,954
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Quote:
Originally Posted by JFP in PA
Yes, they are pretty much the same. What you are looking for is the “steady state” (read fully warmed up engine) reading. Typically they run in the 4-5 inches of water range; anything above 6-7 is a failing AOS, and no vacuum or slight pressure is also a separate failure mode. This is why any serious “back yard” water cooled Porsche wrench should have one of these manometers, the test is a quick and deadly accurate diagnostic tool.
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Thank you!
I will get Luke a call o get the correct oil cap for the CS, just need to source the small nipple to connect the rubber hose to the oil cap 
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03-03-2019, 09:09 AM
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#24
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Registered User
Join Date: Feb 2017
Location: North Eastern US
Posts: 646
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__________________
Rgds, Fred
#317 550 Spyder Anniversary Edition 2004 Boxster S, 3.8L Flat Six Innovations engine, PSS9s, etc, etc . . .
The contents of my posts are for entertainment only. As confirmed by my many motor sports fails, I am not qualified to give product endorsements or mechanical advice 
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03-03-2019, 11:02 AM
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#25
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,553
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Quote:
Originally Posted by Gilles
Thank you!
I will get Luke a call o get the correct oil cap for the CS, just need to source the small nipple to connect the rubber hose to the oil cap |
We buy small bulkhead fittings off Amazon that do the job.
__________________
“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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