Re: Engine knock

Posted by Owen_Dyneto On 2019/1/20 8:54:39

I suspect he was not talking about traditional engine "knocks" which are usually either preignition (combustion) knocks or worn bearing (main and rod) knocks. In either of these cases the oil being kept at exactly the full mark has nothing to do with the cause or cure of those problems. I believe he may have been talking about hydraulic lifter clatter (sometimes called ticking); there is a significantly large pool of folks who have found over the years that running the engine about 1/2 quart overfull eliminates the problem. And there are others for whom it has not solved the problem. And there are others who have not had the problem.