A bad variable valve timing VTC actuator or bad cam phasers can cause a rattling noise on a cold start. Mine happened intermittently before getting it. The possible cause could be the variable valve timing control (VTC) actuator is defective. ![]() VTC Actuator defect - 3 yr/36000 warranty useless. It's quite obvious to me, because they never have any issues with oil consumption or major issues like the VTC actuators or 08 and up v6 motors that develop misfires. So, for those of you who have the grinding on start-up issue, the VTC actuator could very well be your problem. I can put my hand on the solenoid, so I think it will be east to change, once a couple things. Honda has said that the issues around the VTC in the k24 do not affect long term health as well 2011 Honda Fit Sport Left Driver Door Actuator Latch Assembly 3 Answers Personally I just purchased the lock actuator itself instead of the whole assembly Swapped out the actuator P2646 Honda Accord,VTC strainer, Cleaning The Screens P2646 Honda. ![]() How do I lock my VTC? Remove the intake camshaft.
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