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Re: AMC 4.2L rattle at low RPM
Posted to Technical Discussion Forum on 6/16/2023

The Lone Ranger award goes to Bill. The noise does not sound like, nor respond like, anything in the main rotating assy. I would try taking a waveform with a pulse sensor attached to the block or the dipstick tube and an ign sync. Something to ID the frequency... Login to read more.