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fordfixer · 08-12-2012, 10:37 PM

The high compression head should not cause overheating. So I would not be worrying about that. You said you honed the cylinders. What is the clearances for the piston and cylinder wall. Maybe piston slap. What clearances did you set the mains and rods? Do you have a two piece crank pulley? They some times can be bad and you will get a knocking sound from it. Did you do anything with the cam shaft? New timing gear? How did the intermediate gear look for the oil pump? Any one of these things can cause a knocking. First though I would retime the engine so that it fires at exactly top dead center. This is the timing pin in the indented position of the timing gear. Make sure that when you time it that the advance lever is in the upward most position. With the HC head you will only need about three to four clicks of the lever on the quadrant. This is when you are going about 45 mph. Otherwise just one or two clicks. I believe it most likely is your timing.

08-12-2012, 10:37 PM	#2
fordfixer Senior Member Join Date: May 2010 Location: Crete, Illinois Posts: 296	Re: Knocking The high compression head should not cause overheating. So I would not be worrying about that. You said you honed the cylinders. What is the clearances for the piston and cylinder wall. Maybe piston slap. What clearances did you set the mains and rods? Do you have a two piece crank pulley? They some times can be bad and you will get a knocking sound from it. Did you do anything with the cam shaft? New timing gear? How did the intermediate gear look for the oil pump? Any one of these things can cause a knocking. First though I would retime the engine so that it fires at exactly top dead center. This is the timing pin in the indented position of the timing gear. Make sure that when you time it that the advance lever is in the upward most position. With the HC head you will only need about three to four clicks of the lever on the quadrant. This is when you are going about 45 mph. Otherwise just one or two clicks. I believe it most likely is your timing.