Upper "A" Arms TQ
10-27-2014, 11:10 PM
#2
Three Wheelin'
Hey Tony, I got a spreadsheet of hard to find TQ's that somebody had passed around at some point hanging up in the shop FWIW.
Found three values for UCA:
UCA to frame rail 103 Ft. Lbs.
UCA to steering knuckle 48 Ft. Lbs.
UCA to support ring 63 Ft. Lbs.
Regards.
Found three values for UCA:
UCA to frame rail 103 Ft. Lbs.
UCA to steering knuckle 48 Ft. Lbs.
UCA to support ring 63 Ft. Lbs.
Regards.
10-28-2014, 12:10 AM
#3
Archive Gatekeeper
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That's a good question, pretty sure I've never seen the torque spec for those bolts at the end of the upper control arm. (Manual says they're not user-serviceable....)
In the absence of a specific number I'd guess you can fall back on the default M10 value of 30 ft lbs, or the default M12 value of 63 ft lbs.
Anderson's rebuilder should know!
In the absence of a specific number I'd guess you can fall back on the default M10 value of 30 ft lbs, or the default M12 value of 63 ft lbs.
Anderson's rebuilder should know!
10-28-2014, 01:36 AM
#5
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'Cuz I cant remember whether thats an M10 (17 mm ) or M12 (19) nut. I'd guess 19, so 63 would be a good place to start. OTOH, it's torquing that bigass washer onto a rubber bushing, so maybe the torque value should be less? I'm sorry, just not sure in the absence of a published value.
10-28-2014, 01:43 AM
#6
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Thread Starter
'Cuz I cant remember whether thats an M10 (17 mm ) or M12 (19) nut. I'd guess 19, so 63 would be a good place to start. OTOH, it's torquing that bigass washer onto a rubber bushing, so maybe the torque value should be less? I'm sorry, just not sure in the absence of a published value.
10-28-2014, 11:09 AM
#7
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V. good question, when I put in my upper rebuilt arm I wondered about those too ... mine were not particularly tight, so I put my 1/2" torque wrench on them and racked them down pretty tight ... prob to 63 ft lbs as Rob said.
You would think the rebuilder would torque these as part of their process, so I was a little uncertain about making the bolts tighter ...
You would think the rebuilder would torque these as part of their process, so I was a little uncertain about making the bolts tighter ...
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10-28-2014, 06:55 PM
#8
Rennlist Member
Any chance for us amateurs to find that spreadsheet of forgotten TQ's somewhere?
10-28-2014, 07:33 PM
#10
The torque values are in the Technical Specifications handbook. It's the little pocket sized book. It has all the torque values I've needed so far. I found mine in the glovebox when I bought the car. I'm not sure if they're still available Maybe Roger can chime in.
Love the color of your cars T.
Love the color of your cars T.
10-28-2014, 11:04 PM
#11
Three Wheelin'
I'm sure he wouldn't mind if I paid it forward, I will look and see if I saved the actual file somewhere. It may even be up on his new web site.
In the meantime, I think I found the little book that AJRicker speaks of on one of the Morehouse CD's that Roger sells.
Someone may be able to confirm, it's a cool little book.
10-28-2014, 11:22 PM
#13
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I will bet a (new) 928 oil filter that the torque value for that particular front upper A-arm bolt is not in the WSM, nor any of the Technical Spec books. Happy to be wrong.
10-28-2014, 11:28 PM
#14
I keep looking for that little booklet and each time I bid on one, I lose. I bet Rog does have a dozen of them, need to ask.
10-29-2014, 12:07 AM
#15
Three Wheelin'
I might have found it Rob.
It's like microscopic font, and not worded well if it's describing "support plate on link pin (upper control arm)", but the math comes out at 85 newton meters which equals 62.69 ft. lbs.
If I win, I will bequeath my prize to Art since he came up with the source.
