Need heat exchanger nuts

[mihalkog]

Could anyone tell me where I can get the hex nuts that are used to attach the heat exchangers to the engine. I believe they are M8 nuts requiring a 12 mm socket, not a 13mm socket. I can find hex nuts with a 13mm head but not a 12mm head. I'm installing a set of SSI's and need to use the wrench SSI provides, which is for a 12mm nut, to fasten the middle nut on the right HE, where there is no access hole, unlike an OEM HE.
Thanks in advance for any tips.

[Flat Six, inc.]

Are you in the states?....if so, I'll send you some.....

[caproader]

Are you sure that you need 12mm accross the flats? I just went out to the garage and checked the SSI wrench I received with my SSI's about 15 years ago and it takes 13mm accross the flats. I also checked it with some 12mm nuts that I took off of a BMW and the SSI wrench definately takes 13mm.

Or maybe SSI changed the wrench since the Pliestocene days when I got my first set of SSI's.

John

[sithot]

M8's should be 13mm.

Tom

[WM711]

I am pretty sure I have some 12mm m8 copper nuts. Both with flange and without. They cost me about 50 cents a piece from Wurth, I will be glad to help. Here is the link. https://shoponline.wurthusa.com/wurt...log/group.jsp/. I like the fact that you want to use the 12mm nuts... i am that way to. 12mm ATF nuts are used on the studs for Weber carbs, but the yellow zinc ones, not copper. Keep the faith, Bill

[66S]

I get my 12mm ATF copper M8 nuts from J.C. Whitney, VW section. Copper is best

[ajwans]

I bought copper flanged BMW exhaust nuts from Pelican Parts, part number
11-62-1-711-954-M58 they were $0.50 each. Have not fitted them yet.

andy

[mihalkog]

Thank you all for your help. Aaron at Flat Six offered to send me some. And I double-checked; my nuts are 12mm, not 13mm. I guess bigger is not always better.

[sithot]

I pulled my old SSI-1 wrench out and it is 13mm. I have a bag of nuts from Stoddard that are 13mm.

Here is a photograph which isn't the best resolution.

Good luck,

Tom

[911quest]

Either will work the 12mm or the 13mm. The plus side of using the 12mm it gives you a little more room to get a swivel socket in there to tighten down the exhaust. Specially if you don't have the SSI wrench tool.

Just my .02 cents