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Torque Spec Needed

vapid

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Don't know if this is the correct section, but does anyone know the torque for the rear suspension pin to body bolts?

For reference, the bolts that secure the triangular plate in this pic to the body.
img.php
 

Barnes

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Hmmm, regular service manual doesn't have it. Maybe it's in the collision repair manual?
 

vapid

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Yeah, I looked in the service manual that I have. I was hoping that someone had a different one that had the spec.
 

FlyingEagle

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I thought I saw generic bolt torques depending upon the thread pitch and width, listed in the FSM's.
Listed was torque for most of the bolts with a 10mm, 12mm, 14mm head and so on.
Worst case use those, and apply red loctite?

What size is the bolt head?
 

vapid

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M12 bolt, 17mm head.
 
Last edited:

FlyingEagle

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Page 1101/1273 of the 89-93 Chassis and Mechanical Galant Manual.

34-20 REAR SUSPENSION - SDecifications
TORQUE SPECIFICATIONS M34cGB
Items
Rear suspension assembly

Differential carrier to differential support member 58-72
Differential support member to body 80-94
Crossmember bracket to body 51-61
Crossmember bracket to crossmember 80-94

Any of these? If the crossmember bolts are similar, maybe drawing off that for similar torque on the bolts in question?
 
Last edited:

vapid

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Yeah, unfortunately it doesn't list the one I need.
I was thinking of using the spec for the crossmember bracket to body, since the bolts are both M12 and are close to the same length.
 

Galantvr41062

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100lb/ft with red thread locker on the 3 outer bolts.

~John
 
Last edited:

Barnes

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Don't these bolts have lock washers under them? You don't need threadlocker if the lock washers are good.
 

vapid

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Quoting GalantVR41062:
100lb/ft with red thread locker on the 3 outer bolts.

~John



If you don't mind me asking, where did you get that number?
And yes, they're assembled w/ washers.
 

iceman69510

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Quoting GalantVR41062:
100lb/ft with red thread locker on the 3 outer bolts.

~John



That number is too high for the bolts Brett is asking about. I would stick with the 51~61 number.
 

Barnes

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I think Iceman is about right. The thing you have to look at to make a guess is A)The size and B) the grade of the bolt/nut. Only really big and/or high grade stuff gets up to 100 on our cars.
 

iceman69510

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I am also looking at the purpose of the bolt. The high torque figures utilized on that rear suspension are the nuts on the four main mounting studs holding the entire suspension crossmember on. I can see that need for higher clamping force there. Also, the three bolts holding that stud serve a slightly different function, have a 3:1 ratio there, and also go to sheet metal (well, a weld nut) not a large high grade stud.
 

Galantvr41062

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I thought the outer 3 were a M12 x 1.25, if they are only M10 x 1.25 then that would be to high.
 

vapid

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They are M12.
 
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