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wellcraft17 · 08-25-2020, 06:43 AM

I have the same noise on my 56 292 when the idle is set to low, been that way for years. I found the solution was to bump the idle up a hair and the noise disappeared. The noise is definitely coming from inside the engine and I guess it could be rods or wrist pins. I do have very good oil pressure, 40 idle, 55-60 at highway speeds.The other suggestion from a guy at the machine shop was the cam shaft might be moving back and forth slightly, I found that was a little hard to believe but he rebuilds a lot Of engines a year and probably has seen everything.

08-25-2020, 06:43 AM	#27
wellcraft17 Senior Member Join Date: Feb 2012 Location: Tampa fl Posts: 130	Re: Strange "Clanking Noise" at Idle I have the same noise on my 56 292 when the idle is set to low, been that way for years. I found the solution was to bump the idle up a hair and the noise disappeared. The noise is definitely coming from inside the engine and I guess it could be rods or wrist pins. I do have very good oil pressure, 40 idle, 55-60 at highway speeds.The other suggestion from a guy at the machine shop was the cam shaft might be moving back and forth slightly, I found that was a little hard to believe but he rebuilds a lot Of engines a year and probably has seen everything.