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Old 05-31-2014, 08:52 PM   #1
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Default Adapter for water port in block - '90-'95

I'm planning my coolant reroute, and I figured I'd move the water feed from the front thermostat neck to the port on the side of the block.

Here are the 6AN to M12 x 1.25 fittings from Summit.

I don't have fancy AN lines, so I'm going to try to reuse my 5/16" silicone line. This presents a problem. There's no good way to adapt a 5/16" barb without ordering an expensive part from Australia, a questionably cheap part from China, or adding a 90 degree union and using this 5/16" barb adapter.

I'd rather avoid buying another part + shipping for a total of 3 adapters. I could use a 3/8" adapter or a 6AN push-type adapter.

The 6AN is slightly closer to 5/16" inner diameter, so I'm leaning toward that option.

Inner diameters:
5/16" = 0.3125"
6AN = 0.344"
3/8" = 0.375"

However, if stretching the hose a little bit would risk failure, I can just use the 3 adapters and have a proper 5/16" barb.

Last edited by Wowbagger the I.P.; 05-31-2014 at 09:03 PM.
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Old 05-31-2014, 09:31 PM   #2
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You can just get a female -6AN to barb fitting.

Or just make up some AN lines instead so you dont have to replace them every year like you will with the silicone.
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Old 05-31-2014, 10:05 PM   #3
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Four 6AN 90s.

Block adapter.

Mixing manifold adapter.

Braided line.

M14 adapters for turbo.

That's $100. I'm really quite a fan of the $20 method, especially because my hoses are good for the time being. I am going to replace the heat shielding on the lines, so that will also aid longevity.

I currently am running these lines which are rated for up to 350 degrees F.

Last edited by Wowbagger the I.P.; 05-31-2014 at 10:22 PM.
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Old 05-31-2014, 10:08 PM   #4
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AN lines from AN fittings direct work just fine.
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Old 05-31-2014, 10:24 PM   #5
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Huh, that drops it to about $80. Thanks for the tip. I'm still not sure what I'll choose, but the choice did just get harder.

I could just upgrade to braided PTFE and use standard barbed fittings with clamps.
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Old 05-31-2014, 10:25 PM   #6
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Dont forget to google for the discount code.
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