Connecting Rod Bolt Guide Set Installed; Installing Piston Assembly - Pontiac Grand Prix Service Manual

6-64 1969
PONTIAC SERVICE MANUAL
RIDGE CWSED BY CYLINDER WEAR
r ~ )
CYLINDER WALL
TOP
0
F PISTON
4
Fig. 6-113 Cylinder Ring Ridge
1. Remove the bearing cap of the bearing to be
checked. Wipe the bearing and the journal free of oil.
2. Place a piece o f t y p e PG-1 Plastigage, o r equivalent, the
length o f the bearing (parallel t o the crankshaft) o n the
journal o r bearing surface. Install the cap and tighten cap
bolts t o proper torque.
NOTE: Do not turn crankshaft with Plastigage, o r
equivalent, in place.
3.
Remove bearing cap and using Plastigage scale, o r
equivalent, o n envelope (Fig. 6-1 1 I ) , measure w i d t h o f
compressed Plastigage, o r equivalent, before removing it
f r o m t h e bearing o r journal. If the bearing clearance is
between .0002" and .0020", the clearance is satisfactory.
If the clearance is more than ,0020". replace the bearing
w i t h the next size undersize bearing and recheck clearance.
Bearings are available i n standard size, .001" and .002"
undersize.
4. Install a new rear main bearing oil seal in the
cylinder block and main bearing cap if the rear main
bearing was checked and/or replaced.
5. Replace oil pump, cylinder block to oil baffle tube,
and oil baMe if they were previously removed.
6. Replace oil pan, using new gaskets.
CONN ECTlNG ROD BEARINGS
REMOVE
1. Remove oil pan (see OIL PAN - REMOVE AND
REPLACE).
Fig. 6-114 Connecting Rod Bolt Guide Set Installed
screen and oil baffle. Pump must be removed as an
assembly. Screen tube is a press fit in pump body and
must not be rotated or removed.
3. Rotate crankshaft as necessary to bring crank pin
carrying bearing to be replaced straight down (Fig. 6
112).
4. Remove bearing cap of bearing to be replaced.
5. Install connecting rod bolt guide set J 5239 on
connecting rod bolts (Fig. 6-1 14).
2. To gain access to numbers 5, 6, 7 or 8 connecting
rod caps, it will be necessary to remove oil pump
Fig. 6-115 Installing Piston Assembly