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40 Deluxe · 05-18-2021, 10:55 AM

We need more information. Since it makes the noise at idle, it's not likely ignition 'ping' or spark knock. Is the carb original? Is the distributor original? Has the valve lash been checked (.019" hot)? Try shorting outone cylinder at a time to see if th noise changes.

05-18-2021, 10:55 AM	#18
40 Deluxe Senior Member Join Date: May 2010 Location: now Kuna, Idaho Posts: 3,779	Re: engine knocking 292 We need more information. Since it makes the noise at idle, it's not likely ignition 'ping' or spark knock. Is the carb original? Is the distributor original? Has the valve lash been checked (.019" hot)? Try shorting outone cylinder at a time to see if th noise changes.