Contents
Does anti-seize change torque spec?
Because the use of an anti-seize changes the torsion-tension relationship of a fastener system, torque settings need to be recalculated. The dry/oiled torque value can be multiplied by a Torque Reduction Factor to produce the correct torque value for the particular anti-seize compound and material combination.
Should you put anti-seize on head bolts?
There is one time you should always use anti-seize when torquing cylinder head bolts: when it’s a diesel engine. As a rule, you need to chase both the male and female threads and use anti-seize on diesel engines.
Should you Lube bolts before torquing?
So, torque isn’t the true measure of bolt tightness—it’s tension. But lubrication on the bolt threads—and a whole host of other factors—can cause fluctuation in torque readings. So once you add a lubricant of any kind to the threads, all bets are off as to whether the same torque setting will truly secure the bolt.
Should you lubricate bolt threads?
When tightening a fastener ALWAYS use a controlled method. Unless specifically told not to, always lubricate the fastener.
What removes anti seize?
If you need to cut through the grease base, any degreaser or organic solvent will help. Alcohol or acetone is commonly used for this task. If your surface is non-porous, this should sufficiently remove any anti-seize residue.
Does anti-seize dry up?
If stored with exposure to the atmosphere, an anti-seize compound can dry out. This can make it difficult to apply. In response, some people add gear oil, hydraulic oil or other oils to return the anti-seize compound to a consistency that is closer to the original.
What are torque specs for anti-seize fasteners?
I see a lot of variances with torque specs when a fastener is lubed with anti-seize. Some places say 25% less torque is required for same clamping load, some places say 40% less is required. I’m rebuilding the chassis on my jeep and have had to cut out about 8 bolts now.
Why is anti seize used as a lubricant?
The reason being is, in most places where torque is a factor, getting the clamping load even is more important than is the factoring in the amount the lube will reduce the need for torque. The anti-seize will work as a lubricant on the threads.
What should the torque be on a fastener?
Actual values of R can vary between .05 and .35 for commonly encountered conditions. When using anti-seize, reduce the lubed chart reading by 20% to properly torque. Always lubricate and use lubed torque values. Pr o o F lo a d Stre SS (PS i ) yield Stre N gth Mi N .
How much torque is needed for same clamping load?
Some places say 25% less torque is required for same clamping load, some places say 40% less is required. I’m rebuilding the chassis on my jeep and have had to cut out about 8 bolts now.