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6A2-22
1977 PONTIAC SERVICE MANUAL
Fig.
6A2-5 1
Measuring Piston
New pistons are serviced in standard size and oversize.
See parts listings.
Since these are nominal or basic sizes, it is important that
new pistons be measured to ensure proper fit. All new pistons
are serviced with selectively fitted piston pins.
After all measurements have been made, match the new
pistons with the cylinders where they will fit with proper
clearance. Honing of cylinder bore may be necessary to effect
a proper fit. When properly mated, mark the pistons with the
cylinder numbers they fit so they will not become mixed.
CONNECTING ROD AND PISTON
ASSEMBLY
Replace
1.
Install connecting rod bolt guide set
J-6305- 1
1 on
connecting rod bolts (Fig.
6A2-52).
2.
Using a suitable piston ring compressor insert rod and
piston assembly into cylinder so that notch in top of piston
is facing front of engine (Fig.
6A2-53).
3.
From beneath engine, pull connecting rod with
bearing into place against crankpin.
4.
Remove guide set
J-6305-11
and install bearing cap.
Tighten cap nuts to
32
Ib. ft.
5.
Install oil pan.
6.
Install cylinder head, intake and exhaust manifold.
7. Connect fuel line and vacuum lines to carburetor.
8. Install push rods, move rocker arms into position and
tighten rocker arm nuts.
9. Install rocker arm cover.
ENGINE
Remove
1.
Disconnect battery cables at battery.
2.
Drain cooling system.
3.
Scribe alignment marks on hood around hood hinges
and remove hood from hinges.
4.
Disconnect distributor, starter and generator wires,
engine-to-body ground strap, oil pressure and engine
temperature sender wires, and all external vacuum hoses.
5.
Remove air cleaner.
6.
Remove radiator shroud shield assembly.
Fig.
6A2-52
Guide Tool Installed
Fig.
6A2-53
Installing Piston
7.
Disconnect radiator hoses and heater hoses at engine
attachment.
8. Remove engine fan.
9. Disconnect accelerator control linkage.
10.
If equipped with power steering or air conditioning,
remove pump and compressor from mounting brackets and
set aside. Do not disconnect hoses.
1 1. Disconnect gas lines.
12.
Raise vehicle on hoist and drain crankcase.
13.
Disconnect exhaust pipe from manifold.
14.
If equipped with automatic transmission, remove
converter cover, remove three converter retaining bolts and
slide converter to rear.
15.
If equipped with manual transmission, disconnect
clutch linkage and remove clutch cross shaft.
16.
Remove four lower bell housing bolts (two each side).
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