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Nuts |
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67 Marlin 
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Joined: Feb/21/2015 Location: Minnesota Status: Offline Points: 877 |
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 Topic: NutsPosted: Jul/23/2021 at 7:32pm |
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What do you all torque the lug nuts for your steel wheels to? I couldn't find the spec in the TSM but saw an entry in the little maintenance booklet that takes lots of its info from the TSM. For my 1967 Marlin it says 75# for the wheel to hub nuts. I always thought 80-90 on old cars, 75 seemed a little light, but if this is the way, whatever it takes to keep them snug and not warp my rotors.
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Heavy 488
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Joined: Apr/27/2019 Location: In the Status: Offline Points: 3553 |
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Posted: Jul/23/2021 at 7:52pm |
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Torque usually goes by thread diameter
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motorhead_1
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Joined: Apr/16/2014 Location: AZ Status: Offline Points: 1006 |
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Posted: Jul/24/2021 at 6:03pm |
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100ftlbs here
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69 SC/Rambler tribute 401/th400, 68 Rebel SST LSA, 66 F100 460/c6, 88 Merkur Xr4Ti, 71 Jaguar XJ6 LS1, 08 Supercharged Tundra
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67 Marlin
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Joined: Feb/21/2015 Location: Minnesota Status: Offline Points: 877 |
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Posted: Jul/24/2021 at 6:27pm |
I found a lot of references that put the range from 75 to 95 for 1/2- inch studs, most of them the 80 to 90 range. Remembered I still had the tech manual from my 1972 LeMans and checked it for reference; one wheel type was 70 and the other was 75 lbs. |
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Trader
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Joined: May/15/2018 Location: Ontario Status: Offline Points: 6881 |
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Posted: Jul/25/2021 at 9:12am |
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Unless you change something, the manufacturers torque specification should always be used. If the disk brakes came from a donor vehicle, the donor vehicle torque specification should be used.
Manufactures don't pick torque specifications from charts. They design the specification based on the clamping force required and materials. The flex plate/flywheel is the exact same thread and grade fastener, but specifies 110 ft-lbs. But it's not designed for constant removal and re-installation and needs a higher clamping force. Torque your wheel studs to 100 ft-lbs every time, likely should be replacing them after every 4 or 5 wheel rotations or brake work as your stretching the fastener close to yield strength each time. Who knows what/if any damage has been done to the rim as it was never designed for this torque? You wonder why wheels fly off trucks on the highway and kill people - to stop this they inspect wheel stud torque and the majority came off from impacting on or over torqueing and breaking studs. Grammar corrections, only half a cup of coffee!
Edited by Trader - Jul/25/2021 at 11:33am |
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Heavy 488 wrote: