223 Tapping
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Joined: Nov 2008
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223 Tapping
I have a 1956 F100 with a 223 6 cylinder engine. The engine has high miles, but runs very smooth, idles well, and has good power. It however, has a clear tapping sound at idle. I checked the valve lash, was all ok, and then isolated the sound through a rubber hose as coming from the inside of the block, around the number 5 or 6 cylinder. What do you think it could be? Lifter? Rod? Pushrod? It is a solid metal to metal tapping, not real loud, but not dull. What should be my next step? Thanks
Post Fiend
Joined: Mar 2007
Posts: 5,776
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From: springfield il
in the case of my flatty it started out as a tap , and has gotten a lil' worse but not to the point of being unable to drive her .... yet ! i thought maybe a keeper fell off a valve assembly , then tried the pumps , dizzy , and several other things and have come to the conclusion its a piston pin / wrist pin as some refer to 'em . obviously my flatty is a whole lot different than yer 223 , but first observations would be the same for me . bad lifter, or a piston pin . not the end of the world , just time to fix it and you might as well go through her to make sure . it's what i got planned for mine , with a " few " imprvements....
Postmaster
Joined: Apr 2000
Posts: 3,890
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From: La Verne, California
I have a 1956 F100 with a 223 6 cylinder engine. The engine has high miles, but runs very smooth, idles well, and has good power. It however, has a clear tapping sound at idle. I checked the valve lash, was all ok, and then isolated the sound through a rubber hose as coming from the inside of the block, around the number 5 or 6 cylinder. What do you think it could be? Lifter? Rod? Pushrod? It is a solid metal to metal tapping, not real loud, but not dull. What should be my next step? Thanks
