Date: 17 Mar 1999 21:29:52 GMT From: "Jeff" <thmagazinexnopsamnet> Subject: Re: Explanation of engine 'ping' and 'knock'
Ping and knock are the same thing, with ping being a milder form. They are caused by premature ignition in the cylinder. This in turn is caused by incorrect (too advanced) ignition timing, improper air-fuel ratio, or using fuel of too low an octane. A mild ping heard on hard acceleration or steep uphill climb generally is considered harmless. Continual pinging at constant speed or heavy knocking (you will hear a loud noise and ususally feel the engine shudder) are considered bad and can cause serious engine damage. Burning of valves and pitting of piston tops are possibilities. Andrei <andreicanopsamt.com.au> wrote in article <7co7qs$q5d$1nopsam.mel.aone.net.au>... > Could somebody clever please give an explanation of these terms for those of > us out there who don't know? > > Much appreciated
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