piston skirt clearance

[pbf777]

...............but now as I'm mocking up a piston and rod on cylinder no. 4 , it measures .007 in the hole and when I used the same piston and rod in no. 1 it was .005 in the hole.  Is this acceptable ?

     Note that although the decks might be off by the .002", this observation can also be caused by the crank throws being off this distance;  but I don't think I'd loose sleep over it , as from Ford Motor Co. day one they would have been off by generally twice that, and that would have been a "good one"!   

     My intention is not to condone any instances of substandard workmanship, but rather provide a certain sum of perspective and reality to the situation.   

     Scott.

[blykins]

I've seen many blocks from ole' Henry come out that were off .020" (not 2, but 20) from end to end on one deck. 

I've even seen some aftermarket FE blocks that were off that bad..............

[frnkeore]

My Sept, '57 dated 361 Edsel block was off .016 front to back on one side, about .012 on the other and both were higher than 10.17. I had it decked to clean up both sides and it came out @ 10.172.