Thread: Engine Noise
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Old 10-14-2019, 10:21 AM   #1
smurph
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Join Date: May 2010
Location: Cold Spring Harbor, NY
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Default Engine Noise

My 1929 engine has developed a disturbing noise which I can best describe as a rattle, or a “clack, clack, clack” (not a clank). The noise usually does not occur at idle, but appears once revs increase (maybe 1500 rpm) and then will usually , but not always, stop as rpm’s increase above 2000(?).
When driving under load there is usually no noise, but when I take my foot off the accelerator the “clack, clack, clack” frequently appears.
I think the problem may be coming from cylinder #2 because when I short out the plugs one by one, I get the expected decrease in revs from #’s 1,
3, and 4 but in addition I hear a definite but more subdued rattle or chatter or clack coming from #2.
Any thoughts about what’s going on would be much appreciated.
Thanks,
smurph
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