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Good point.
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1977 911S Targa 2.7L (CIS) Silver/Black 2012 Infiniti G37X Coupe (AWD) 3.7L Black on Black 1989 modified Scat II HP Hovercraft George, Architect |
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Join Date: Jul 2000
Location: So. Calif.
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Sherwood |
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Somatic Negative Optimist
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23-24 ft-lbs is pretty low and only a quality, sensitive and calibrated torque wrench ensures correct reading. I find it hard to believe that at least some of the studs didn't need a little tightening?
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1980 Carrerarized SC with SS 3.2, LSD & Extras. SOLD! 1995 seafoam-green 993 C2, LSD, Sport seats. ![]() Abstract Darwin Ipso Facto: "Life is evolutionary random and has no meaning as evidenced by 7 Billion paranoid talking monkeys with super-inflated egos and matching vanity worshipping illusionary Gods and Saviors ". ![]() |
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I know both methods done with the engine on a stand. The backside method is accurate and easier, especially when the engine is in the car.
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See my response in #15. Accurate torque can only by determined as the fastener rotates in the threads. Static friction, as in a fastener already tightened, will be higher in order to either tighten or loosen it. Thus, if the spec is 23 ft.lbs. and is already to spec., the fastener will require a higher application of torque to break it free. The correct method of "retorquing" is to loosen the fastener (at least below final spec.), then retighten to spec. I think the objective in this thread is to confirm the cyl. head nuts aren't loose or a stud isn't broken, in which case if a preset-type torque wrench signals "OK" at the specified torque, I would call it a day. Sherwood |
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![]() I read a press release on some new product a few years ago. It claimed that many structural failures on heavy equipment (ship boiliers etc..) could be traced back to checking and rechecking the torque on retaining bolts. The stress caused from inspection torquing eventually caused the failure they were trying to prevent. The product was some sort of washer which changed color based on existing nut/bolt pressure present (applied torque).
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1977 911S Targa 2.7L (CIS) Silver/Black 2012 Infiniti G37X Coupe (AWD) 3.7L Black on Black 1989 modified Scat II HP Hovercraft George, Architect |
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83 911 Production Cab #10
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Never do major PM or any CM on Monday... If the stuff work, don't F$%# around with it. I remember a 6 months Nato deployment that my total CM time was 1 hours... due to the brake band on the Revox recorder (recording the Commies at the time) broke... Fixed it by using the plastic band from the 40Lb chicken box. Probably still there.
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Who Will Live... Will See ![]() ![]() ![]() 83 911 Production Cab #10, Slightly Modified: Unslanted, 3.2, PMO EFI, TECgt, CE 911 CAM Sync / Pulley / Wires, SSI, Dansk Sport 2/2, 17" Euromeister, CKO GT3 Seats, Going SOK Super Charger |
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Yes, I probably should have thought of the inaccuracy brought by a swivel and I'll have it in mind for the future. I do have a nice calibrated 10-60 Nm wrench so I should be able to get accurate torques if not using a swivel.
Like some of you mentioned it is probably best to leave the studs as is for now and that is what I will do, although it is nice to know that at least no one is broken or much too lose. I'll see if I can get on with the valve adjustment tomorrow, today is hung over day. ![]() /b
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1980, 911 SC. Ex-US car in Sweden since June 2010. Insta: @911scowner |
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