On 11-27-96 Elvis Hargrove wrote to Tom Harris...
EH>
EH> Look at it this way... pivoting in the piston you have TWO rather
EH> large
EH> bearing surfaces to absorb the load versus ONE limited surface in the
EH> rod end.
Been doing some research on wrist pins, looked
through Fords Service Bulletins and found these
*******************
Wrist pins are assembled in the pistons with
a metal to metal fit. When properly selected
the pin can be pushed into the piston with a
slight pressure of the hand.
***********************
Wrist pins are selected to give a clearance of
.0005' in the connecting rod.
*********************
The upper end of the connecting rod has
.040 total side play between the wrist pin
bosses in the piston.
*********************
The lower end of the connecting rod has
.008' to .012' end play on the crankshaft,
**********************
When fitting a wrist pin in piston, select a
pin which cannot be pressed into the piston by
hand at room temperature. Next submerge
the piston in boiling watcr, allowing the
piston to remain in the water from one to two
minutes, then withdraw piston, wipe out pis-
ton pin holes with a clean cloth and insert
pin. If properly selected the pin can then be
pushed into the piston with a slight pressure
of the hand. Taking the chill out of the pin
by holding it in your hand for a few seconds
and then applying a light film of oil on the
pin will make it easy to install.
When I get this car restored I want to
drive it from Austin Texas to the top of
Pikes Peak and back, thats one reason I
want it done right.
Tom
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