This dust cap was stuck as the allen bolt hole had become rounded, making it impossible to remove by normal method. Dirt and Grime: Accumulation of. So I thought it was about time I checked the air levels in my new-ish tyres (Goodyear 205/55R16s) and I can only unscrew one of the dust caps by hand, the rest are completely stuck fast. I've tried spraying lubricant on them and clamping the stem with pliers then using another set of pliers to turn. To remove anti-theft dust caps locate the key or tool that came with the anti-theft dust caps. Insert the key or tool into the centre of the dust cap and turn it counterclockwise to loosen the cap. That should release pressure on the plastic. Even better. Stuck dust caps show up at the worst time—low air pressure, a cold morning, a gas-station pump ticking away.
[PDF Version]