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Registered
Join Date: Jul 2001
Location: Northville, Michigan USA
Posts: 6
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Half shaft bolt torque level
Finishing up my rebuild on my 1976 930 and am ready to torque the half-shafts back to the trans. If I'm reading it right the spec book calls for 120 Nm or about 88 ft-lbs. Is that correct?
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07-25-2001, 09:24 AM
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Registered
Join Date: Oct 2000
Location: Sherwood, Oregon
Posts: 2,119
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Seems high. But they are 10mm longer than the 911 ones. I'd wait for an answer before you go any further.
No help. Just my 2c. ------------------ Cary Kutter 77 Euro Carrera w/3.2 PCA Region - Big Sky |
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07-25-2001, 03:29 PM
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Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
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Half shafts are a toutchy-feely issue when it comes to bolt torque. I went with book spec. because they seem low on my 77 for some reason. I conquered the issue with new bolts at factory spec. using SAFETY WIRE. I did my 6 bolts in 2 sets of 3 each. Therefore ZTQ [zero tension quotient]...............Ron
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07-25-2001, 05:45 PM
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Registered
Join Date: Jul 2001
Location: Northville, Michigan USA
Posts: 6
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So you went with the 88 ft-lb?
Will take your advice and safety-wire too! |
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07-25-2001, 06:12 PM
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Registered
Join Date: May 2001
Location: Peoples Republic of Long Beach, NY
Posts: 21,140
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NO..My 77 911s bolts are M10, torque is 83Nm or 60 ft. lbs.............Ron
------------------ RoninLB |
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07-25-2001, 09:17 PM
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Registered
Join Date: Jun 2001
Posts: 93
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Would split lock washers be a more suitable/easier means of ensuring a stable assembly?
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07-25-2001, 10:38 PM
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Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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The only appropriate washer for Allen bolts is what the factory has used all along ... new Schnorr washers at each installation! I have never seen CV-joint bolts loosen when properly torqued with new Schnorr washers. I feel that the Allen bolts themselves are only good for two installations, maximum! A little preparation in advance to procure new gaskets, bolts and washers goes a long way towards making srvicing CV-joints a reliable and trouble-free process.
Schnorr washers and DIN 912 Allen bolts are available in bulk from Metric & Multistandard Components Corp. at the following URL: http://www.metricmcc.com/metric.htm  ------------------ Warren Hall 1973 911S Targa |
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07-26-2001, 12:21 AM
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