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Registered
Join Date: Aug 2001
Location: seattle wa
Posts: 843
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torque specs for rotor bolts
Hey all, does anyone know what the torque figures are for the bolts that hold the rotor to the hub? my car is a 78 SC. many thanks.
Kyle. |
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03-12-2003, 06:27 AM
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Irrationally exuberant
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What bolts? I thought there were just a couple of little screws (6x12mm)?
-Chris
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'80 911 Nogaro blue Phoenix! '07 BMW 328i 245K miles! http://members.rennlist.org/messinwith911s/ |
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03-12-2003, 06:36 AM
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Join Date: Aug 2001
Location: seattle wa
Posts: 843
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sorry, the front rotors, not the rears.
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03-12-2003, 06:39 AM
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It'll be legen-waitforit
Join Date: Jan 2002
Location: Calgary, Canada
Posts: 6,990
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Kyle,
This brings up a great point; someone out there must have a spreadsheet of all the torque specs or a good compilation of one. I would love to keep one in my glove box so I don't have to come and search Pelican every time. Who's the smart cookie?
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Bob James 06 Cayman S - Money Penny 18 Macan GTS Gone: 79 911SC, 83 944, 05 Cayenne Turbo, 10 Panamera Turbo |
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03-12-2003, 06:39 AM
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Senior Member
Join Date: Feb 2000
Location: Lacey, WA. USA
Posts: 25,310
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Kyle, I did not look it up, but discussed it with JW. He agreed that 18 lb/ft sounds correct, assuming Grade 8 bolts. For rotors, Grade 8 sounds appropriate, and that's probably what comes stock. See if there is an 8.8 cast onto the bolt heads.
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Man of Carbon Fiber (stronger than steel) Mocha 1978 911SC. "Coco" |
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03-12-2003, 06:59 AM
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Registered
Join Date: May 2002
Location: Portland, Oregon
Posts: 12,651
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Superman,
Bolt grades seems to be one of those "Ponderable " things. I believe that 8.8 is a metric designation for high strength bolts and it corresponds to a SAE 5 (3 ticks on head) bolt. A metric 12 is equivalent to a SAE 8 (6 ticks on head) bolt. I can't find the link but somewhere on the web is a great page that explains more than you ever wanted to know about high strength bolts. Anyway, did you resolve your spark saga?
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Harry 1970 VW Sunroof Bus - "The Magic Bus" 1971 Jaguar XKE 2+2 V12 Coupe - {insert name here} 1973.5 911T Targa - "Smokey" 2020 MB E350 4Matic |
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03-12-2003, 07:59 AM
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Registered
Join Date: Aug 2001
Location: seattle wa
Posts: 843
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thx Jim, 18 it is! i'll get that done tonight hopefully !!!
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03-12-2003, 10:22 AM
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Registered
Join Date: Nov 2002
Location: Los Angeles
Posts: 729
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18ft/lb is right. I checked the Bentley manual, it' 17lb.
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Caliber 1987 911 Cabriolet |
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03-12-2003, 11:10 AM
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Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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Standard M8 DIN 8.8 bolts and nuts ... calling for the standard torque of 25 Nm or 18 lb-ft. I guess a rounding error is in effect in Bentley!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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03-12-2003, 11:20 AM
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The Blue Pheonix
