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-   -   F23 Trans top mount bolts torque specification (https://www.cobaltss.net/forums/general-cobalt-68/f23-trans-top-mount-bolts-torque-specification-324665/)

jdbaugh1 07-13-2017 09:25 AM

F23 Trans top mount bolts torque specification
 
I was following the build book but now I have decided it is either wrong or I am misunderstanding which bolts it is talking about. https://cimg5.ibsrv.net/gimg/www.cob...ab8d4e425c.jpg
It clearly says to torque the upper transmission mount bolts to 74 ft-lb. I may be mistaken but idk what other bolts it could be referencing.
https://cimg7.ibsrv.net/gimg/www.cob...e422891fd4.jpg
This is how the torque wrench was set.
https://cimg0.ibsrv.net/gimg/www.cob...5bed60e121.jpg
I got one bolt to actually torque to 74 ft-lbs but the next one snapped off.
https://cimg2.ibsrv.net/gimg/www.cob...86686d8583.jpg
Luckily I was able to extract it with an easy-out of sorts.

After looking around I have found some values but the way they are described I am not sure if they are for the bolts in question. Based on the bolt size though I am thinking this bolt is actually supposed to be torque to 44 ft-lbs. Does anyone know for sure. This is the upper mount located under the fuse box on a 2.2 L61 with F23 trans.

07blackg5 07-13-2017 12:19 PM

off the top of my head the upper engine and upper trans are something like 39 ftlb. I know for sure they arent 74.

ECaulk 07-13-2017 12:32 PM

Don't feel bad I did the same thing on Leemanfor's lsj, he read me the 74 number and I got it to 65 then snap.


Originally Posted by 07blackg5 (Post 7656085)
off the top of my head the upper engine and upper trans are something like 39 ftlb. I know for sure they arent 74.

That sounds right.

jdbaugh1 07-13-2017 12:55 PM

So is the book wrong or am I interpreting it wrong? I thought the upper engine bolts were one size down from the upper trans bolt but not sure on that. Just thinking it my be a bit more. Here are torque specs somebody posted. I just don't understand their nomenclature with front, rear and side mounts. As there are only 3 mounting points one would think they meant orientation in the car and the side mount is actually the top mount. If it is then this post is saying it is supposed to be 33 ft-lb but I am looking for a solid reference.

Lol yeah I just kept turning and the whole time I was like why aren't I there yet. Really surprised I got one to 73 ft-lb without breaking. Just glad I broke the bolt and didn't pull the threads out of the transmission.

ECaulk 07-13-2017 01:12 PM

I'm pretty sure the book is wrong, they have the wrong picture associated with the text

07blackg5 07-13-2017 01:17 PM

I know the upper engine mount to frame rail is 74, and the intermediate mount bracket to block/head bolts are 74. The rear bracket to trans bolts are probably 74. They are similar sized bolts


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