2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Oil Cooler Bolt Size?

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Old May 19, 2008 | 09:15 AM
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Question Oil Cooler Bolt Size?

So I'm working on removing the engine from my '87 TII, and I have come across a bolt I do not have a big enough socket for. I just need to know the size of the head so that I can go to the hardware store and buy the right size socket.

It is the bolt that bolts the oil cooler line to the rear of the engine, it's pretty big lookin, I'm guessing 22 or 24 mm, but does anyone know the exact size for the head?

Thanks!
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Old May 19, 2008 | 09:29 AM
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Leah Dizon > Roast Beef
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22mm IIRC.
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Old May 19, 2008 | 09:34 AM
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mazda13B88
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Either 22 Or 23 Mm
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Old May 19, 2008 | 09:48 AM
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Off to the hardware store!
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Old May 19, 2008 | 10:34 AM
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23MM I believe.
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Old May 19, 2008 | 11:06 AM
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Originally Posted by Aaron Cake
23MM I believe.
Indeed.

I have to think that Snap-on or Mac got to the engineers and specced that weird size...it's the only time I've ever seen it.
I have a pretty good tool selection and when I ran into the oil cooler fittings I was like, "WTF?"...
I wondered for a while if it might be Whitworth or some other asinine spec for a while.
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Old May 19, 2008 | 04:15 PM
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After 3 trips to the hardware store and not being able to find a 23mm, it was vice grips, liquid wrench, and a breaker bar that came through For Teh Winz
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Old May 19, 2008 | 04:20 PM
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Sears
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Old May 19, 2008 | 04:33 PM
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Leah Dizon > Roast Beef
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Originally Posted by Aaron Cake
23MM I believe.
Damn.

I remember having to go through a lot of sockets before finding the correct one. I should organize my stuff.
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Old May 19, 2008 | 04:40 PM
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A 15/16ths 6 point socket works just fine.
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Old May 19, 2008 | 11:46 PM
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Originally Posted by Stanello
A 15/16ths 6 point socket works just fine.
Yep..15/16ths does in a pinch,But get a Six point,not a 12point...23mm is usually a bit of an Oddball size to get in a Socket set.They usually don't come with them.and you have to buy it seperately.
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Old Sep 12, 2023 | 05:41 PM
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[QUOTE=Aaron Cake;8205191]23MM I believe.
On my 1991 there 23 i just tried a 22mm
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