Pontiac firebird 1968 - Connecting Rod and Piston Assembly

SIX CYLINDER ENGINE 6-27
^1
Fig. 6-50 Checking Connecting Rod Side Clearance
CONNECTING ROD AND PISTON ASSEMBLY-
REMOTE AND REPLACE
REMOVE "
1. Remove rocker arm cover.
2. Disconnect fuel line and vacuum lines at
carburetor.
3. Remove cylinder head, Intake and exhaust mani-
folds as an assembly,
4. Remove ring ridge using a suitable ring ridge
remover (Fig. 6-51).
5. Remove oil pan.
RIDGE CAUSED BY CYLINDER WEAR
Fig. 6-52 Checking Crankshaft End Play
6. Check connecting rod and piston for cylinder
number Identification and If necessary, mark them.
7. Remove bearing cap and install connecting rod
bolt guide set J 5239.
8. Carefully remove connecting rod and piston as-
sembly by pushing out with knurled handle of long
guide.
CONNECTING ROD AND PISTON-
DISASSEMBLE
NOTE; Use care at all times when handling and
servicing connecting rods and pistons. To prevent
possible damage to these units, do not clamp rod
or piston in vise since they may become distorted.
Do not allow pistons to stroke against one another,
against hard objects or bench surfaces, since dis-
tortion of piston contour or nicks in the soft alumi-
num material may result.
Step A (Fig, 6-53)
1. Remove piston rings using J 8021.
2. Install J 9510-3 pilot on piston pin.
3. Place spring and J 9510-2 into base J 9510-1
and Index J 9510-2 with piston pin.
4. Using J 9510-2 as a guide, press piston pin out
approximately 1/4".
Step B (Fig. 6-54)
1. Remove J 9510-2 and spring from support
J 9510-1.
Fig. 6-51 Cylinder Ring Ridge
2. Press piston pin rest of way out of piston.