Tappet noise ?

[Greg out west]

Hi Guy's,


I had original A cam reground to the A-B Grind that the Model A New's did a story about year's ago (By Stipe's )


The Engine the cam was in was a original set up with the solid Ford lifter's...It was very quiet...I latter had the engine rebuilt & got double lock lifter's from the old Ford Obsolete..Installed them & no tappet noise,,,


Installed the new reground "A-B" cam & Tick, tick, tick,..Tried to reset the lash, made no difference...Had another reground cam in the box I never used. It had a round tip on the lobe Vs the original pointed tip...Out of Frustration I installed this other cam


It turned out to run nice & quiet...Which is what I wanted,,,With this cam I'am running the single lock tappet that I ran on the other cam that made the noise This tappet has the wide base...


So what gives ?? Must of been the grind..

Greg out west,

[tbirdtbird]

"This tappet has the wide base..."

You answered your own question.
There is another thread ongoing right now about this same problem

[pat in Santa Cruz]

what lash did you set it at? A regrind does not necessarily have the same lash as an original. Stipe's 330, for example, is set at .012 for both in and ex. Your regrind probably required a different lash than what you set.

[Greg out west]

Tbird,,


I ran the same tappet on both cam's,,,one ticked like "hell" the other is quiet..I thought I made that clear in the 4th paragraph..Pat,,I set the tappet's as Stipes called for .012



On this other regrind I set them to .10 & .013..Quiet as a mouse...Must of been the regrind on the other cam (Clicking)


Greg out West,,

[d.j. moordigian]

The center cam main bearing is known to cause a noise that sounds
like a loose lifter. Did you measure the housing bore and both cams
too see what the clearance is? This should be done every time you
change cams...

[Greg out west]

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Hi D J


The Cam had about 3-4 thou "wear"...The Cam I have in the Engine now is about the same... & No noise ?...Here's something I didn't know till recently The center cam Brg Is the only part of the A engine that has "Pressure". And that's the part that seemed to wear over the year's ??



I know what you are talking about the center cam brg making noise...This noise was Tappet sound's front & back of the engine, not just the center "Area"..This cam was a 28 five brg,,So it was stronger than the latter 3 brg as far as flexing..


I had it in a 28 block that was in the A when I got it year's ago...Like I said quiet as a mouse,,,& was running the original "Script lifter's"...


I sold the 28 block & the 28 cam that I had reground went with it...Never heardback how it rand ???



Thank's guy's for your help


Greg out West