Chevrolet 1963 Corvette, Руководство по ремонту и настройке, Страница: 124 / 346

ENGINE AND ENGINE REBUILDING 117
as to pull the bearings towards the center of
the block. Leave the tool in this position, pilot
the new front and rear bearings on the in-
staller, and pull them into position.
4. Return the puller to its original position
and pull the remaining bearings into posi
tion.
NOTE: Ensure that the oil holes align when
installing the bearings. This is very impor-
tant! You can make a simple tool out of a
piece of %2 in. brass rod to check align-
ment.
5. Replace the camshaft rear plug, and stake
it into position.
Piston and Ring Servicing
Corvette pistons are made of aluminum alloy
and should not be exposed to careless treat-
ment. Never use a wire brush to clean these
pistons. Use cleaning solvent to remove var-
nish or carbon. Clean the ring grooves with a
groove cleaner tool. Be sure the oil holes in
the grooves are clear. Check for cracks, scuff
marks, etc., and replace any piston that is
suspect. Check the piston skirt measurement
with a micrometer and compare to specifica-
tions.
Piston pins are matched to an individual
piston and should be replaced with the piston
as a set, not separately. Clean the pin with
solvent and with a micrometer, check the pin
external size and the piston pin bore size. Re-
place both if wear tolerance exceeds the
specifications by 0.001 in.
Two compression rings and an oil ring as-
sembly are used on Corvette pistons. The
compression rings are marked on their top
side and should always be assembled to the
piston with this mark upward. Before assem-
bling the rings to the piston, they should be
fitted to their individual cylinder bore.
..NOTCH TO FRONT OF ENGINE-
"F" TOWARD
FRONT
OF
ENGINE
Correct piston/connecting rod positioning for 396,
427, and 454 cu In. engines
The second ring is identified by a chamfer
or step on its lower edge. The top compres-
sion ring has a chamfer on its upper edge and
is chrome faced. Corvette rings are furnished
in oversizes of 0.020 in., 0.030 in., and 0.040
in.
Pistons and Connecting Rods
REMOVAL AND INSTALLATION
Before removing the pistons, the top of the
cylinder bore must be examined for a ridge.
A ridge at the top of the bore is the result of
normal cylinder wear, caused by the piston
rings only travelling so far up the bore in the
course of the piston stroke. The ridge can be
felt by hand; it must be removed before the
pistons are removed.
A ridge reamer is necessary for this opera-
tion. Place the piston at the bottom of its
stroke, and cover it with a rag. Cut the ridge
away with the ridge reamer, using extreme
care to avoid cutting too deeply. Remove the
RIDGE CAUSED BY CYLINDER WEAR
frrr
CYLINDER WALL
TOP OF PISTON
Correct piston/connecting rod positioning for 305, 327, and 350 engines
VALVE CLEARANCE DEPRESSION TO
CENTER OF CYLINDER BLOCK
RIGHT BANK
2-4-6-8
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