Upper balljoint to upper control arm torque spec?

Moderator: Moderators

Upper balljoint to upper control arm torque spec?

Postby sugaryuk » Tue Jan 19, 2016 7:34 pm

Anyone happen to know the torque specs of the 4 bolts on the upper balljoints (75 Vega) that secure it to the control arm? I've searched and haven't been able to find anything yet. Thanks...
User avatar
sugaryuk
 
Posts: 141
Joined: Wed Mar 05, 2014 1:29 am
Location: Vancouver,BC


Re: Upper balljoint to upper control arm torque spec?

Postby cjbiagi » Tue Jan 19, 2016 8:08 pm

I forget the size and grade number of those but here is a link that should help. Just look up the size, grade and type of threads
https://www.boltdepot.com/fastener-info ... orque.aspx
Clyde.........75 Monza 2+2
User avatar
cjbiagi
 
Posts: 8319
Joined: Sun Jun 25, 2006 2:37 pm
Location: Glenwood, Illinois

1975 Chevrolet Monza

Re: Upper balljoint to upper control arm torque spec?

Postby sugaryuk » Tue Jan 19, 2016 8:59 pm

Thanks! That's a great link for bolt info-lots of useful stuff. Looks like about 30 lbs should be good. (chart show max 52 lb for 7/16 gr 8 but that sounds pretty high for a small bolt-- I figure 30 is good being that there's 4 of them with lock washers too.)

One other question while I have anybody's attention-- I'm using Bob Gumm's adapters for my S10 brake upgrade and I'm having a hell of a time trying to find the larger castle nuts for the balljoints, can I just use a large ss washer with the smaller castle nut to provide ample coverage over the adapter spacers?....seems to me it should still provide enough coverage and strength.
User avatar
sugaryuk
 
Posts: 141
Joined: Wed Mar 05, 2014 1:29 am
Location: Vancouver,BC

Re: Upper balljoint to upper control arm torque spec?

Postby cosvega76 » Wed Jan 20, 2016 11:56 am

Don't forget that those charts are referencing the diameter of the shank of the bolt - not the wrench size. A 1/4-28 bolt is usually around 12 lb-ft.

When I was using the adapters on my car I used an thin stainless steel washer. The upper is a follower joint and doesn't see the load that the lower one does. You should be fine.


Chuck
cosvega76
 
Posts: 2553
Joined: Mon Jul 03, 2006 8:36 am
Location: Moscow Mills, MO

1973 Chevrolet Vega GT

Re: Upper balljoint to upper control arm torque spec?

Postby sugaryuk » Wed Jan 20, 2016 1:23 pm

cosvega76 wrote:Don't forget that those charts are referencing the diameter of the shank of the bolt - not the wrench size. A 1/4-28 bolt is usually around 12 lb-ft.

When I was using the adapters on my car I used an thin stainless steel washer. The upper is a follower joint and doesn't see the load that the lower one does. You should be fine.


Chuck


I kind of figured that out after I torqued down the first bolt, it got pretty tight at 20 lbs and there was no way it was going to make it to 30 lbs. When I first looked at the chart I thought it was shaft size, then I second guessed myself and thought it must be head size.---Always go with your first thoughts!!
User avatar
sugaryuk
 
Posts: 141
Joined: Wed Mar 05, 2014 1:29 am
Location: Vancouver,BC

Re: Upper balljoint to upper control arm torque spec?

Postby cjbiagi » Wed Jan 20, 2016 3:14 pm

No, as Chuck said it is thread (shank) size, not head size.
Clyde.........75 Monza 2+2
User avatar
cjbiagi
 
Posts: 8319
Joined: Sun Jun 25, 2006 2:37 pm
Location: Glenwood, Illinois

1975 Chevrolet Monza

Re: Upper balljoint to upper control arm torque spec?

Postby Monza Harry » Wed Jan 20, 2016 6:19 pm

I have no idea how they came up with this system for classification of grades, but the ones we would use often are;
    no lines = Grade 2
    3 lines = Grade 5
    5 lines = grade 8
I hope this helps out! Harry
Last edited by Monza Harry on Fri Jan 22, 2016 11:34 pm, edited 1 time in total.
I'm not a hoarder I'm a preservationist 78 Monza Spyder (Soon To Be 2+2 with Spoilers)
User avatar
Monza Harry
 
Posts: 2362
Joined: Tue Oct 04, 2011 8:50 am
Location: Windsor ON Canada

1978 Chevrolet Monza 2+2

Re: Upper balljoint to upper control arm torque spec?

Postby cjbiagi » Wed Jan 20, 2016 10:23 pm

You mean 5 lines equal grade 8
Clyde.........75 Monza 2+2
User avatar
cjbiagi
 
Posts: 8319
Joined: Sun Jun 25, 2006 2:37 pm
Location: Glenwood, Illinois

1975 Chevrolet Monza

Re: Upper balljoint to upper control arm torque spec?

Postby Monza Harry » Fri Jan 22, 2016 11:34 pm

I'll Edit That Thanx Clyde my proof reader is blind (me :dunce: ) Harry
I'm not a hoarder I'm a preservationist 78 Monza Spyder (Soon To Be 2+2 with Spoilers)
User avatar
Monza Harry
 
Posts: 2362
Joined: Tue Oct 04, 2011 8:50 am
Location: Windsor ON Canada

1978 Chevrolet Monza 2+2


Return to Suspension, Steering, & Brakes Tech

Who is online

Users browsing this forum: No registered users and 1 guest