Side Case Bolt Torque Spec

[Sentinel]

I'm changing out the clutch plates and springs on my 1983 Suzuki GS450ED, and I can't seem to find the torque specs for the side case bolts. I have a new gasket already btw. Do you know what the torque is supposed to be for these side case bolts? Also, where can I find such specifications in the future? I checked the manuals I could find and I can't even see where this spec is given if at all in any of them, and searching online has not helped either. I found one that seemed to say 7 lbs, but is that correct?

 

[tkent02]

Don't have the manual for your bike, but 6mm bolts into aluminum are typically something like 60 - 70 inch pounds, maybe 73. 7 foot pounds is more like 84 inch pounds, I wouldn't go there unless I had to and knew I had the right number.

I do know too loose is easier to fix than too tight. A torque wrench calibrated in foot pounds will only do too tight or way too tight.

 

[Sentinel]

Don't have the manual for your bike, but 6mm bolts into aluminum are typically something like 60 - 70 inch pounds, maybe 73. 7 foot pounds is more like 84 inch pounds, I wouldn't go there unless I had to and knew I had the right number.

I do know too loose is easier to fix than too tight. A torque wrench calibrated in foot pounds will only do too tight or way too tight.

All the specs in the three manuals I have specify only "Foot Pounds" for torque figures, and like I said, if the one or two specs I found are actually for the side case bolts, then it lists 7 Foot Pounds,. which isn't na lot, and the bolts are actually 8mm, not 6mm. Keep in mind I am not speaking of the "crankcase" bolts, but rather the "side case" bolts.

 

[Guest]

All the specs in the three manuals I have specify only "Foot Pounds" for torque figures, and like I said, if the one or two specs I found are actually for the side case bolts, then it lists 7 Foot Pounds,. which isn't na lot, and the bolts are actually 8mm, not 6mm. Keep in mind I am not speaking of the "crankcase" bolts, but rather the "side case" bolts.

The head of the bolt may be 8mm the bolt it self is actually 6mm

 

[tkent02]

Like I said, too loose is easier to fix than too tight. 7 ft. lbs. is a lot for small screws. Go easy.

 

[Sentinel]

The head of the bolt may be 8mm the bolt it self is actually 6mm

OK, thanks for that, I see that now that I'm looking at the specs again.

Checking one of them it does specify unmarked "Conventional" bolts, which these are, and that are 6mm at the thread require 3 to 5 lbs. f. But now I wonder if the 7 lbs. f spec I found elsewhere is incorrect or not.

It's really quite pathetic how terribly edited and laid out all three of these manuals are, and that no one seems to have this information available anywhere online.

 

[Sentinel]

Like I said, too loose is easier to fix than too tight. 7 ft. lbs. is a lot for small screws. Go easy.

Good advise of course, and will do.

 

[Gorminrider]

crankcase bolt (6mm) torque is 6.5-9.5 ft lbs from the manual.

 

[Sentinel]

crankcase bolt (6mm) torque is 6.5-9.5 ft lbs from the manual.

OK thanks a lot. Now exactly which manual is this, and on what page?

That's a pretty significant range of specs for torque, "6.5-9.5".

Also if you can scan it and post it here so I can have a look at exactly how they have it listed and worded and such would be greatly appreciated.

 

[Guest]

crankcase bolt (6mm) torque is 6.5-9.5 ft lbs from the manual.

I concur
I use 7' lbs or 84 " lbs

They will snap at 140 "lbs !! (broken torque wrench will teach you that!) try not to wind the wrench completely down when your done, only wind it down to the lowest setting!

You might find that 84" lbs isn't that tight but it is just as much as needed. Go tighter and you will create leaks instead of preventing them by squishing the gasket.

Haynes manual Page 27
It simply states all 6mm bolts are 7' lbs(84"lbs) , no range in the Haynes or Clymer manual. But the Clymer actually says case bolts.
GS500 manual says 76"lbs to 115"lbs which is a bit more than I would attempt.

If you want a better manual, Get one from.... well I was going to say gs500 but really any manual for the bigger engines is much better detailed for this kind of stuff.

 

[Sentinel]

I understand that I need to keep the metal plates in order and make sure they go back in facing the same way they came out, but what about the new cork plates? They look the same on both sides, am I right? So those can be flipped either way and of course in any order, correct?

 

[tkent02]

Those are crankcase bolts, not wimpy side cover bolts. They thread into MANY more aluminum threads. There is No reason for a clutch cover to be that tight.


Do what you want, when they strip don't blame me.

 

[Sentinel]

Those are crankcase bolts, not wimpy side cover bolts. They thread into MANY more aluminum threads. There is No reason for a clutch cover to be that tight.


Do what you want, when they strip don't blame me.

I agree, as I said, those figures just range way too high to be correct IMO. I'll start off at 5 lbs. f and see how it does. If that doesn't keep it sealed and tight then I'll up it at 7 lbs. f, which I'm sure would be the absolute max on those.

 

[Guest]

Does seem like allot doesn't it, Even feels like it (just tried one)

funny thing is that it says the exact same for the valve cover bolts in all 3 manuals but two of them say 6.5-7'lbs

 

[tkent02]

If it's a foot pound wrench don't even use it. Inch pound wrench, and only a small one at that. Really there's no need for a torque wrench at all, just go easy. That's probaby why there's no torque spec listed, there's no reason to get them tight at all, people used to just use a screwdriver. Finger tight, and then a little bit more with a small wrench is plenty. There is nothing to be gained by going tight other than crushed and leaking gaskets, stripped threads and heartache.

 

[GSX1000E]

I torque them to 6 ft.lbs. or 72 in.lbs. if they seep oil, I tighten them to 78-80 in. lbs.

 

[Sentinel]

If it's a foot pound wrench don't even use it. Inch pound wrench, and only a small one at that. Really there's no need for a torque wrench at all, just go easy. That's probaby why there's no torque spec listed, there's no reason to get them tight at all, people used to just use a screwdriver. Finger tight, and then a little bit more with a small wrench is plenty. There is nothing to be gained by going tight other than crushed and leaking gaskets, stripped threads and heartache.

That is my basic rule for small bolts.

 

[Sentinel]

I torque them to 6 ft.lbs. or 72 in.lbs. if they seep oil, I tighten them to 78-80 in. lbs.

Thanks, that's basically what I'll be doing here.

 

[GSX1000E]

I am pretty sure that they will break or strip at about 7.2 ft.lbs.

 

[Sentinel]

And now I need to know what the torque spec is for the "Governor Bolt".

The nearly worthless shop manual gives a ridiculously wide range from 9.5 to 16.5 lbs. f.

I'm thinking on just going with 12 lbs. f and no more.