 NPT or AN on /6 Oil Cooler |
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| patssle |
 Oct 28 2012, 12:04 PM
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#1
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Senior Member  Group: Members Posts: 981 Joined: 28-August 09 From: Houston, TX Member No.: 10,741 Region Association: None  |
I need to get my /6 3.0L oil cooler modified with an AN or NTP fitting. Being that my oil tank is NPT - I would think that putting a 1" NPT fitting on the oil cooler is the way to go. But I see some people say they used -16 AN.
Does it really matter what type of fitting to use for this application? Thanks. |
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| GeorgeRud |
Oct 28 2012, 12:07 PM
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#2
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Advanced Member Group: Members Posts: 3,725 Joined: 27-July 05 From: Chicagoland Member No.: 4,482 Region Association: Upper MidWest |
I think that most people have been using the -AN fittings. As long as you can make up the required hose, it probably doesn't make a lot of difference as long as the internal dimensions of the fitting don't restrict oil flow.
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| jd74914 |
Oct 28 2012, 07:27 PM
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#3
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Its alive Group: Members Posts: 4,782 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
Fitting type doesn't really matter. Given the option, I would pick AN fittings over NPT because they have the tendency to seal better and do not require swivel ends.
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| Mark Henry |
Oct 28 2012, 08:20 PM
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#4
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
A NPT to -AN adapter fitting is pretty common so it doesn't really matter. What kind of hose will you be using? The sump to the engine is a suction side and regular hose could collapse, I'd make sure that won't be an issue.
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| patssle |
Oct 28 2012, 09:42 PM
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#5
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Senior Member Group: Members Posts: 981 Joined: 28-August 09 From: Houston, TX Member No.: 10,741 Region Association: None |
Has anybody ever done a hose-barb fitting instead of a threaded AN? Kind of like what is already on the oil cooler now before the conversion? I'm looking into this as a possibility - it's the way it is on the 911 (and Porsche designed it that way, they know a thing or two) - why spend all that extra money on fancy hose and fittings since it's unpressurized?
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| brant |
Oct 28 2012, 10:03 PM
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#6
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914 Wizard Group: Members Posts: 11,641 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
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I've seen hose fittings on a 911 cooler come off at the track
the threaded fitting is safer the motor looses oil pressure pretty quick when the oil hose is off... that being said many many cars survive with barb fittings. but having seen one fail in person its not something I'm comfortable with. |
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| GeorgeRud |
Oct 28 2012, 10:07 PM
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#7
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Advanced Member Group: Members Posts: 3,725 Joined: 27-July 05 From: Chicagoland Member No.: 4,482 Region Association: Upper MidWest |
I would put a fitting on the hose as it has to be removed (opened) to properly drain the oil for an oil change. The original -6 has threaded metric fittings next to the support bracket for this purpose.
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