Transmission Cooler line O rings?

Heavyopp · Jul 7, 2017

I'm adapting my AW4 trans cooler lines over to AN hose using --Earl's Performance AN to Metric Adapter Fittings 9919DFHERL

Everyone says these are O ring fittings on the metric side to the trans -- What size o rings? 14mm ID should be but what diameter is right? Are these really supposed to be used with O rings on the transmission? I'm not entirely sure...

O rings aren't sold with the adapter and they are not linked in the "suggested Parts" section of the adapter listing

Anyone have a part number from Summit racing for them? Been searching for an hour and I come up with nothing

Thanks for any help

ehall · Jul 7, 2017

I'm in the process now, ordered the adapters and will measure for O-rings when I get them

cal · Jul 7, 2017

I have never used o rings with the adapters.

IIRC i use a brass washer similar to what a brake line uses.

Heavyopp · Jul 7, 2017

ehall said:
I'm in the process now, ordered the adapters and will measure for O-rings when I get them

What O rings did you get?

I have everything in my cart at Summit just can't find those questionable o rings

dan1977p · Jul 7, 2017

When I had the OE fittings out and one of the orings crumbled, I ended up using an o-ring for my 06 harley oil drain plug.

Heavyopp · Jul 7, 2017

cal said:
I have never used o rings with the adapters.

IIRC i use a brass washer similar to what a brake line uses.

I beginning to think this is a smart move -- I did this on 2 gm vehicles in the past -- I don't recall using o rings on either

notamos · Jul 7, 2017

I did this same conversion a few years ago (using the same parts). I came across the following part on a few forums, used it & it is still sealed up great.

https://www.amazon.com/gp/product/B005RUSZ9G/ref=od_aui_detailpages00?ie=UTF8&psc=1

Heavyopp · Jul 8, 2017

notamos said:
I did this same conversion a few years ago (using the same parts). I came across the following part on a few forums, used it & it is still sealed up great.

https://www.amazon.com/gp/product/B005RUSZ9G/ref=od_aui_detailpages00?ie=UTF8&psc=1

That looks about right -- now it's me being cheap -- $11.16 for 10 O rings when I only need 2...

I did a chat with summit earlier today -- Asked them what O rings to use

they came up with these: https://www.summitracing.com/parts/ear-176006erl/overview/

Says they are -6 an O rings -- I don't need them for the AN side of the fitting, trying to find specs on this ring, ID,OD and thickness

I'm wondering if -6an O rings would be 14mm ID -- and these are $3.95 for a pack of 10

What a PIA... -- you would think they would sell the O ring with the fitting when it's specified "O ring required"

Heavyopp · Jul 8, 2017

SO had a chance to check some dimensions

-6an is 9/16 - 18 thread

9/16th is 14.28 MM so the -6an O rings should have an ID of somewhere really close to 14 mm

ehall · Jul 8, 2017

but is 14mm the OD or the middle or what? The sensor plug also has a 14mm thread, but the o-ring is recessed a bit. Need to measure with calipers.

trippled · Jul 8, 2017

cal said:
I have never used o rings with the adapters.

IIRC i use a brass washer similar to what a brake line uses.

I think my adapters came with o rings. My sending unit adapter came with a copper washer. I would not hesitate to use washers. Could go to parts store and just grab some copper or aluminum washers.

md21722 · Jul 8, 2017

If you want to use an o-ring you can go down to NAPA with your part and they will help you find one. They have a box with 30 different sizes and sell out of it for 99 cents each.

Heavyopp · Jul 8, 2017

I ended up adding the Viton O rings that are labeled -6an to my order -- it was $3.95 for a bag of 10

We'll see what happens once they get here

If these are wrong I will go to Napa either get a proper fitting O ring or copper washer

ehall · Jul 12, 2017

As expected those 14mm ID o-rings are way too big.

These things have to be tight against the bolt and the orifice in order to seal.

The one on the left is the stock o-ring from the temperature sensor port (14MM w/ T55 head). The one on the right are some that I bought from NAPA that are close-10MM ID x 2.5MM thickness = 15MM OD

This is what they look like on the 14mm x 1/8 NPT adapter bung and the AN fittings

Snug on the bolt and on the orifice. A little big but they go in with some tranny fluid for lube

Johnnie Walker · Jul 12, 2017

http://naxja.org/forum/showthread.php?t=1045807&highlight=cooler&page=6
some info on the swap here.

donthelegend · Jul 13, 2017

https://www.summitracing.com/parts/EAR-176106ERL

Those are the o rings I used with this fitting:

https://www.summitracing.com/parts/FRA-460614-BL

Have worked fine for 2 years now.

Heavyopp · Jul 14, 2017

Parts came in -- O rings look fine -- I took pictures but have to find a new photo hosting website since the new photobucket restrictions

Ended up with EAR -176106ERL for O rings

The fit snug over the threads and just slightly loos when seated in place below the threads, Should work fine but I'll know better when I pull the current hardware out of the transmission

Suggestions for photo hosting websites???

Transmission Cooler line O rings?

Heavyopp

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ehall

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cal

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Heavyopp

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dan1977p

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Heavyopp

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notamos

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Heavyopp

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Heavyopp

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ehall

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trippled

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md21722

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Heavyopp

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ehall

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Johnnie Walker

Piece of Fish!

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Heavyopp

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