Mailbag: Tracking Down the Source of Engine Knock
Q: I built a 350 engine using parts from Summit Racing. At about 3,000 miles the engine would make a clacking noise at startup, but only when the engine hadn’t been run in a while. When the oil pressure came up (60-70 pounds), the noise stopped in a second or two. At about 3,500-3,800 miles, I
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