Toyota-Lexus-Subaru-Honda Camshaft

The camshaft lobes that open the engine’s valves operate under some of the most severe loads of all the parts in the engine.

A worn camshaft will reduce your engine’s performance. More important, once the camshaft begins to wear significantly, its rate of wear accelerates. As a result, metal particles are introduced into the oil, which causes the rest of the engine to wear out more rapidly.

If your camshaft is worn, and especially if it’s rate of wear is apparent due to the valves rapidly getting out of adjustment due to changing clearances, you should replace the camshaft. At this point, you should also consider whether it might be appropriate to also overhaul the head.