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First, is it a tick or more of a clatter? (I know, I know, not trying to slit hairs here, but its important) A light tick could be anything from insufficient oil level to excessive valve lash (not sure if this is an older pushrod or newer hydraulic lifter engine, sorry). If its a deeper clatter (more what I think of as "diesel" sounds) then it could range from something as simple as premature ignition timing (spark knock), which could just require an adjustment to the distributor, to something as serious as rod or main bearing knock (very serious indeed, requiring an engine rebuild to correct).

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17y ago

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