That noise they're referring to is a slight rattle that only lasts for a few seconds at engine start-up. It is caused by oil draining down out of some of the passages when the engine is stopped. Some oil filters do not have an internal check valve to prevent that. Normally that is not a serious problem. Ford has had some problems with wear on the ends of the pushrods causing a clicking sound but since this problem seems to have started suddenly, the best place to start is by having the oil pressure tested with a mechanical gauge. If it is low, addressing that problem will solve the noise problem. If pressure is normal, have an experienced mechanic listen to the noise to help determine what is causing it. Oil additives should not be necessary if you use good-quality oil. They won't solve mechanical problems either if that's what it turns out to be.
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Wednesday, March 9th, 2011 AT 3:47 PM