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2026. 6. 30. 작업

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When does it make sense to replace a camshaft?

처리 내용

Obviously any physical damage; cracked, broken, bearing surface damage, sheared gear, etc... Any catastrophic failure warrants cam replacement without possibility of repair. A warped cylinder head could theoretically also warp the cam shaft but i would not just replace it, i would check it first. Place the cam in a set of V blocks. Put a dial indicator on the bearing surface and spin the camshaft. Watch how much the dial indicator deflects. The appropriate engine manual will have the warpage specs. The more subtle problems arise from lobe wear. A valve that does not open all the way could cause strange problems. At idle everything is fine but a misfire develops under power at high RPM. If the lift of the valve is reduced it won't allow as much air in which is most visible at high RPM. This is difficult to detect. A compression test may not reveal a problem. If every other possible issue is eliminated, pull the valve cover and compare lift of several valves. At worst the lobe is complet