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Old 01-04-2014, 05:08 PM   #1
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Default Turbo Coolant/Water Line Size

Had a google, found no answers!

When running water lines from here


What internal diameter hose should be used?

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Old 01-04-2014, 07:03 PM   #2
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-3 for oil, -4 for water.
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Old 01-04-2014, 07:18 PM   #3
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-4 being 4/16ths being 1/4"?
Sorry, I'm from England!
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Old 01-04-2014, 07:19 PM   #4
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I was using AN sizing
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Old 01-04-2014, 08:02 PM   #5
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AN sizing only references the OD though yeah? When really I'm asking for the ID of the hose or the OD of the nipples on the car...
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Old 01-04-2014, 08:31 PM   #6
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I think -4 is 5/16", -3 is 1/4"...that's off the top of my head. I'm positive -6 is 3/8" so I just scaled down. I custom did my lines in all braided with no barbed fittings, so I can only compare.
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Old 01-04-2014, 08:50 PM   #7
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I used 1/4" ID.
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Old 01-04-2014, 09:53 PM   #8
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1/16' = -1AN, so -4 is 1/4", -6 is 3/8", -8 is 1/2", etc. All the way up to -20AN which is 1 1/4".

I've typically used -6AN for water lines, but that's only because M14x1.5 to -4AN fittings can be hard to find. -4AN or -6AN is fine.
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Old 01-05-2014, 11:02 AM   #9
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Mick,

In my experience hose with an 8mm internal diameter is a good fit. I use steel braided hose with crimped banjo connectors on one end and and hose clamps on the other.

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Old 01-05-2014, 11:07 AM   #10
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Hmmm I never even thought about what size my lines were... I got Artech's SS oil/water lines. Anyone know off hand what size these are?

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