01-04-2023, 09:49 AM
To remove, drop them in a pan of boiling water and let soak for a minute or two, then they should tap out easily enough.
You may find minor corrosion, in which case - depending on severity - replace the pins or give them a polish with very fine emery.
Some pins are a bit tight in their pistons from new. If the piston won't articulate freely at room temperature, as you surmise, trouble is in store. The usual way to deal with this is to warm the piston and lubricate with paraffin, and spin the gudgeon pin in its hole until it frees up a bit. You can hold it in a hand brace or an electric drill, just don't go crazy. Machining will take too much off.
You may do best to start off whizzing with a worn pin which will be less aggressive - it doesn't take much.
You may find minor corrosion, in which case - depending on severity - replace the pins or give them a polish with very fine emery.
Some pins are a bit tight in their pistons from new. If the piston won't articulate freely at room temperature, as you surmise, trouble is in store. The usual way to deal with this is to warm the piston and lubricate with paraffin, and spin the gudgeon pin in its hole until it frees up a bit. You can hold it in a hand brace or an electric drill, just don't go crazy. Machining will take too much off.
You may do best to start off whizzing with a worn pin which will be less aggressive - it doesn't take much.