Ford T Series User Manual

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TH E F ORD E:O.:GIN E
13
Wllat abo ut A 7\ T ? ?
Valve timing? nswer J. VO. t:,t:,
In timing the engine the point s of opening and closing of the valves
are, of course, what should be considered. As the valves are prop-
erly timed at the factory when the engine is ~Ht the necessity for
retiming would occur only wh en such par't:s a11 the cam shaft, time
gears, or valves were removed in overhauling the en~e .
In fitting the larg e time gear to th e cam shaft it is important to s ee
that the first cam points in a direction oppo s ite to the zero mark
(see Cut No. 4}. The time gear s must also m es h so that the tooth
mark ed zero (0} on the small time gear will come between the two
teeth on the large gear at the zero point. The time gears now being
properly set , th e exhaust valv e on No. 1 cylinder is open and th e
intak e valve clo sed , the other va lv es being in the positi on indicated
in Cut No. 4. The opening and closing of th e valves being as fol·
lows:
The exhau st valve o pe ns when th e pi s ton reach es -h " of
bottom center, the distance from the top of the piston he ad to th e
top of the cylinder casting m eas uring 3% ". The exhaust valve will
close
on top cent e r, the piston be ing -!r" abov e the cylind er ca sting .
Th e intake valv e opens n" after top ce nt er and clo ses n" after
bottom c en ter , th e distance f ro m the top of th e piston to the top of
the cy linder casting measu ring 3 78 " .
The clearance betw e en the pu sh rod and va lv e stem should never
be greater t han ':1\ " nor less than -h "· The correct clearanc e
is naturally half way betw ee n these two m eas urement s. The gap
sho uld be measured when the push rod is on t he heel of the cam .
Va lve L if1i ng T oo l
How the valve lifti ng to ol should be used. ( Cut Xo. 5)

Ford T Series Specifications

General

Brand	Ford
Model	T Series
Category	Trucks
Language	English