14 replies to this topic

[fenghuang]

Any general rules on when NOT to use copper slip?

[nicklouse]

Yes lots.

It is an anti seize compound not a grease.

[Fast Ivan]

Don't use on fasteners and then torque up to the "dry" torque figure. Normally all torque figures quoted will be dry

[fenghuang]

Yes lots. It is an anti seize compound not a grease.

I know it's an anti seize compound. I had a feeling there were some bolts / nuts / studs / machine screws / etc / etc / etc that it shouldn't bevused on, but I can't remember what.

Don't use on fasteners and then torque up to the "dry" torque figure. Normally all torque figures quoted will be dry

what sort of percentage difference does it make? If Haynes says 10, or 40 ft-lbs, can that reliably be compensated for when using copper slip?

[Guess-Works.com]

Only place I use copper grease is on the back and sides of disk pads, and the contact points on shoes.... no where else.

 

On hubs/flanges which have a locator ring for the wheels (non mini) also use it there on the contact point...

[One step at a time]

I also put copper slip on my battery terminals. Applied with a brush it makes a better contact and it stops any oxygenation.

[A-Cell]

I also put copper slip on my battery terminals. Applied with a brush it makes a better contact and it stops any oxygenation.

Not oxidation, sulphate build up. Vaseline is better than copper grease

Edited by A-Cell, 02 October 2015 - 07:22 PM.

[A-Cell]

Copper slip is anti seine, does what it says, so anywhere you don't want seizure! Particularly good for heat anti seizure, so for example exhaust manifold fixings

[Swift_General]

Re torque figures:

I can't comment on copper grease specifically but as a very rough guide the torque figure for lubricated fasteners should be reduced by around 20% - 25% relative to dry torque in order to produce the same clamping force. Much depends though on firstly the lubricant used, and secondly the thread material so there is no 'magic' figure.

[fenghuang]

... lubricated fasteners should be reduced by around 20% - 25% ... there is no 'magic' figure.

The one that got me thinking today was thermostat housing. Heavily corroded bolts that really didn't want to shift, and Haynes said IIRC 8-12Nm. Anti seize compound seems ideal for this, and I went for 10Nm, which seemed about right.

But I had a feeling there were issues about avoiding certain areas? No?

[A-Cell]

Really it's about using a bit of common sense. It's anti seize. It's very helpful in areas of dis-similar metals to inhibit or at any rate reduce galvanic corrosion. Also where there is heat that can accelerate this corrosion and seizure.

[Fast Ivan]

I'm not a fan of copper slip full stop really, plenty of better products out there. But using an anti seize on the thermostat bolts I would consider ok as it's a non critical area, but you still run the risk of over stressing the fastener.

[ChopperHarris]

To start with its "Copaslip"
and
http://www.molyslip....-Data-Sheet.pdf

[1984mini25]

I only use it on fixings that are prone to being a pita to remove, like the rear subframe to healboard bolts for example.

[cal844]

every where ive stripped...