Yes, the cylinder ridge should be removed before the piston. The cylinder ridge is a raised edge that forms at the top of the cylinder bore due to wear from the piston rings. This ridge can cause the piston to stick in the bore, which can lead to engine damage. Removing the cylinder ridge before installing a new piston will ensure that the piston moves freely in the bore and prevent any damage to the engine.
Here are the steps on how to remove the cylinder ridge:
1. Remove the cylinder head.
2. Use a piston ring expander to compress the piston rings.
3. Insert a cylinder ridge reamer into the cylinder bore and turn it by hand until the ridge is removed.
4. Remove the piston ring expander and reinstall the piston rings.
5. Reinstall the cylinder head.
