Chevrolet Corvette 1963 Repair & Tune-Up Manual page 103

ranged in a vee configuration. The cylinders
are numbered front to rear with cylinders 1,
3, 5, and 7 on the left bank and 2, 4, 6, and 8
on the right, when viewed from the rear. Fir-
ing order for both engines is 1-8-4-3-6-5-7-2.
Both the crankshaft and camshaft are sup-
ported by five bearings. Viewed from the
front, crankshaft rotation is clockwise. Lubri-
cation is full pressure, and a gear type oil
pump feeds the system through a full flow oil
filter. Both the oil pump and the distributor
are driven by the camshaft. The main oil gal-
lery pressurizes the bearings via the crank-
shaft and camshaft. The valve lifter oil gallery
provides oil to the lifters which, in turn, feed
the rocker arms through the hollow push-
rods.
The standard bearer of Corvette high per-
formance models was established, with the
1967 introduction of the 430 horsepower L-
88 limited production option engine. This unit
was furnished with a Tuft-rided and cross-
drilled heavy duty crankshaft, magnafluxed
and shotpeened connecting rods with
connecting rod bolts, forged pistons with
pop-up domes, and aluminum cylinder heads
(open-chambered in 1969).
The peak of large block development was
reached in 1969 with the ZL-1 engine. This
was the basic L-88 engine but with an alu-
minum cylinder block.
Engine Removal
This procedure is basically the same for all
models regardless of which engine is used.
Certain pieces of optional equipment require
minor specific changes, but overall, the op-
eration remains the same.
1. Mark the relationship between each
hood hinge and the hoodi Remove the hood.
2. Disconnect the battery cables at the
battery.
3. Remove the air cleaner assembly and
cover the carburetor. Mark any disconnected
hoses so that they may be reinstalled prop
erly.
4. Raise the front of the vehicle and sup
port it with jackstands.
5. Locate and remove the engine coolant
drain plugs. There is a drain plug on each side
of the engine block, just above the top of the
oil pan.
6. Loosen the radiator drain petcock and
allow the coolant to drain from the radiator.
7. Remove the radiator hoses and the
heater hoses.
ENGINE AND ENGINE REBUILDING
8. Remove the radiator fan shroud, radia
tor, engine cooling fan(s) and fan clutch (if so
equipped).
9. Drain the engine oil.
10. Remove the ignition shielding and re
lease the distributor cap hold-down screws.
Move the distributor cap (with wires still in
tact) out of the way (away from the firewall).
11. During this step, mark the location
and/or connection point of each item so that
these items
stalled/reconnected.
a. Disconnect the wiring from the
starter, ignition coil, and distributor (pri
mary wiring).
b. Disconnect the wiring from the alter
nator.
c. Disconnect the wires from both the
water temperature sender and oil pressure
sender. If the vehicle has a mechanical oil
pressure gauge, disconnect the gauge tube
at the engine block.
d. Disconnect the tachometer drive and
7
/ie inch
fuel injection drive cables at the distribu
tor, if so equipped.
e. Disconnect the engine ground wires.
f. Disconnect the wiring from the idle
solenoid, if so equipped.
g. Disconnect the wiring from the var
ious emission control items, as applicable
(e.g.-TCS switch, oxygen sensor, baro
metric sensor, air control valve, etc.)
h. Disconnect the accelerator and trans-
mission linkage (or cables, on late models)
at the carburetor, fuel injection unit, or
Throttle Body Injection (TBI) unit. If
equipped with cables, unbolt the cable
brackets from the engine.
i. Disconnect the fuel supply and evap-
orative emission lines at the fuel pump. On
TBI equipped models, disconnect the flex-
ible hoses which connect die frame-
mounted lines to the engine-mounted lines.
In either case, plug the fuel supply line to
prevent fuel siphoning from -the tank.
j. Disconnect any vacuum lines which
run from a body-mounted item to an en-
gine-mounted item (e.g.-power brake unit,
cruise control, etc.)
12. Remove the drive belts from both the
power steering pump and die air condition
ing compressor, if equipped with these items.
Unbolt the pump and compressor from their
respective mounting brackets and tie these
units out of the way (with lines still at
tached—DO NOT disconnect the refrigerant
lines from the A/C compressor).
may be properly
97
rein