installed a new 6:1 head now a tapping noise

[Roxo]

My tapping noise was coming from the distributor hitting the Gasket. I did not expect that because the first time i did make sure to ream out the hole for the shaft. That's the part that puzzles me. The second time I got in a hurry and forgot to do that. I still herd a few light taps during a long time running. so I will inspect the distributor out further tomorrow. I did change out the upper shaft drilled for oiling. Maybe I missed something there also.

[Purdy Swoft]

Check to make sure that the rotor tip isn't striking some of the spark plug wire contacts in the distributor cap body , as the distributor shaft turns . Sometimes the plug wire contacts are too long and needs to be filed for clearance . I think that Ford listed a gap of twenty five thousants at the rotor tip . Check the gap with a feeler gauge at all four contacts . The gap needs to be the same on all four . A little more gap is OK if its not too much . I set mine at thirty five thousants for hotter spark at the spark plugs . When the spark jumps , it gets hotter . I've seen them so close that the distributor cap would slightly jump as the engine ran .

[denniskliesen]

Are you sure you dont have camshaft bounce? You can check for this by removing your timing pin, turning it around and if it has a rounded end hold it against the cam gear with engine at a slow idle. Apply pressure and most important know how far away that fan is from your hand. I have the tapping noise, camshaft bounce and am considering changing it out just to confirm its not a problem with the cam. I have regrind cam and new lifters to try.

[Roxo]

Originally Posted by denniskliesen

Are you sure you dont have camshaft bounce? You can check for this by removing your timing pin, turning it around and if it has a rounded end hold it against the cam gear with engine at a slow idle. Apply pressure and most important know how far away that fan is from your hand. I have the tapping noise, camshaft bounce and am considering changing it out just to confirm its not a problem with the cam. I have regrind cam and new lifters to try.

That's something I was meaning to check also. I will check that tomorrow morning. so far truck is running good.

[Roxo]

Originally Posted by Purdy Swoft

Check to make sure that the rotor tip isn't striking some of the spark plug wire contacts in the distributor cap body , as the distributor shaft turns . Sometimes the plug wire contacts are too long and needs to be filed for clearance . I think that Ford listed a gap of twenty five thousants at the rotor tip . Check the gap with a feeler gauge at all four contacts . The gap needs to be the same on all four . A little more gap is OK if its not too much . I set mine at thirty five thousants for hotter spark at the spark plugs . When the spark jumps , it gets hotter . I've seen them so close that the distributor cap would slightly jump as the engine ran .

I did check that this morning, it's one thing I did think of. Because it is a new cap I thought maybe it was hitting one of the contacts. Gap was good.

[30 Closed Cab PU]

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I do not know what type of noise happens, but I believe an overly tightened down screw for holding the distributor can make a noise. I am probably off base, but throwing it against the wall to see if it sticks.

[Roxo]

Originally Posted by 30 Closed Cab PU

I do not know what type of noise happens, but I believe an overly tightened down screw for holding the distributor can make a noise. I am probably off base, but throwing it against the wall to see if it sticks.

well I'm new to the Model A so that could be. I might just be over tightening the screw. I will check that too.