Re: Knocking question

Posted by Owen_Dyneto On 2011/10/22 20:04:42

Had a rod knock on my 34 Eight many years ago, and about 100 miles from home. Found the offending rod by shorting the plugs one at a time, and then left that plug wire off for the drive home to save the crankshaft. Poured babbit bearing of course, but at about 83,000 miles I couldn't really complain.

Paul - also possible it's a wrist pin knock, generally most noticeable at idle or low speeds. Takes the form of a "double knock" with a pause inbetween before the next double knock.

And of course it could be lots of other things, for example fuel pumps have been known to make such sounds.