Pontiac tempest 1968 Service Manual page 7

0-4 1968 P O N T I A C SERVICE MANUAL
the window division channel. T i r e to ground clear­
ance should not exceed 6 inches while towing the car
and speeds should not exceed 35 mph for distances
up to 50 miles.
CAUTION; Power steering-equipped cars should
be towed with caution, since there is no power
assist with the engine off.
CODING SIDE BAR LOCK
A l l 1968 Pontiacs, Tempests and Firebirds w i l l
have new type lock cylinders and keys (Fig. 0-9).
Two separate keys are used; type " C
n
(hexagonal)
for ignition switch, door locks and tailgate and type
" D " (round) for the trunk and glove compartment.
The keys w i l l not be interchangeable with each other
or with those used p r i o r to 1968 because of new
key way design and an increased number of biting
depths.
stamped on i t s side. Before the lock cylinder may
be coded, the correct code must be determined. I f
the numbered blank in the key head has not been
removed, determine the code by consulting the lock
manufacturer's code book. Should the blank be miss­
ing, proceed as follows;
1. Place the key on the silhouette in Fig. 0-10,
aligning the key with the outline as accurately as
possible.
2. Starting at the base of the key blade, determine
the lowest level visible in position No. 1.
3. Determine the lowest visible level for the r e ­
maining five positions. As each tumbler level is
determined, write that number in the blank space
above the position numbers.
After the key code has been determined, the cor­
rect tumblers should be installed as follows:
Locks are available without tumblers, springs or
retainers. Uncoded side bar locks may be coded to
match the keys used on the car by ordering the above
parts separately. Five types of tumblers are used to
compose the various combinations and each is coded
according to a number, one (1) through five (5),
1. Beginning with slot next to head of cylinder
(number one position) install tumblers in slots in
sequence determined from key code.
2. Insert spring in each round cavity of each
tumbler lock between slots.
NOTE: Do not pull springs apart; unscrew them.
C
K E Y
F O R I G N I T I O N A N D D O O R
L O C K S , U S E C O D E S E R I E S 0 N 0 0
T O 9 N 9 9 A N D 0 P 0 0 T O 9 P 9 9 .
D
K E Y
F O R R E A R C O M P A R T M E N T
A N D G L O V E C O M P A R T M E N T
L O C K S , U S E C O D E S E R I E S 0 R 0 0
T O 9 R 9 9 A N D 0 T 0 0 T O 9 T 9 9 .
3. Install spring retainer over springs with ends
inserted in slots, and hold in place.
4. Check by inserting cut key. Side bar w i l l drop
in place when key is inserted i f correct tumblers
have been installed.
5. Stake spring retainer in place using small
punch and light hammer.
P O S I T I O N
123456
L E V E L
2 3 4 5
Fig. 0-9 Key Blanks
Fig. 0-10 Key Coding Diagram