oldballs
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I thought bolt torque specs were based on dry threads, but I'm an amateur. Can someone set me straight.
Threadlock or Never-Seize
- Thread starter Deere Dude
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I thought bolt torque specs were based on dry threads, but I'm an amateur. Can someone set me straight.
Diamondpilot
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I always thought the same.
Dry for everything except aluminum that should have antisieze and critical engine parts that are oiled during assembly.
Chris
mikehaugen
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I've seen charts that have both values... dry and lightly oiled.
Oliver1655
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If using nylon insert locking nuts "nylock", you are to hand tighten them. The friction of using an impact gun or drill will potentially melt the nylon causing it to lose it's holding properties.
If you are needing a lock nut, you can tread a nut about 1/3 the way onto a bolt then tap the remaining portion of the nut with a hammer causing it to slightly deform/becoming slightly oval. You want it to require a wrench to tighten but not so tight you have to use excessive force to tighten it.
Have done this for years & have never had a failure.
If you are needing a lock nut, you can tread a nut about 1/3 the way onto a bolt then tap the remaining portion of the nut with a hammer causing it to slightly deform/becoming slightly oval. You want it to require a wrench to tighten but not so tight you have to use excessive force to tighten it.
Have done this for years & have never had a failure.
puckgrinder85
Platinum Member
We use top lock nuts (just a deformed nut) in everything except stainless.
Raspy
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AFAIK, Engine assembly bolts should be torqued while lightly oiled. This would be head studs, rod bolts and the like, but lug nuts are dry. I put grease or anti seize on my lug nuts but have to be careful with the torque or they might snap.
You have to be careful with nuts on stainless too, because they have a tendency to gall if the threads are tight.
Also, don't use aluminum based anti-seize on stainless because aluminum and stainless react. So, anti-seize becomes seize. Use the copper based stuff or just straight grease. Never screw a stainless bolt into aluminum as a permanent fastener unless you use some kind of grease or teflon paste. No-lox electrical grease is great for this. Out in the weather, stainless screws can seize and strip the aluminum threads out when removed. This is the problem with boat hardware and outboard motors.
You have to be careful with nuts on stainless too, because they have a tendency to gall if the threads are tight.
Also, don't use aluminum based anti-seize on stainless because aluminum and stainless react. So, anti-seize becomes seize. Use the copper based stuff or just straight grease. Never screw a stainless bolt into aluminum as a permanent fastener unless you use some kind of grease or teflon paste. No-lox electrical grease is great for this. Out in the weather, stainless screws can seize and strip the aluminum threads out when removed. This is the problem with boat hardware and outboard motors.
