Pontiac Fiero 1988 Service Manual page 8

G E N E R A L INFORMATION OA-5
POSIDRIV
SCREW HEAD
IDENTIFICATION MARKS |4»
5 2 0 0 0 9 0 A
Fig. 6 Cross Recess Screw
P R E C A U T I O N S A G A I N S T T I P P I N G
On front-wheel drive vehicles, the centerline of
gravity is further forward than on rear-wheel drive
vehicles. Therefore, w h e n e v e r removing major
c o m p o n e n t s from t h e rear of the vehicle, while
supported on a hoist, it is mandatory to support the
vehicle in a manner to prevent the possibility of the
vehicle tipping forward.
CAUTION: Failure t o follow t h e
procedure outlined m a y result in
unsatisfactory car performance, or a
durability failure which m a y result in
loss of control of car.
ME tic S I Z E S
MU)
8
10 12 14
n
20
N U T S A N D
0.4 0.3 1.4
2.2
3.0 4.2
7 0
A L L M E T A L B O L T S _ « N
:
L § S L 4.0
7
o
12 18 25 35
57
A D H E S I V E O R N Y L O N
N< 0.4 0 6
1.2 1.6
2 4 3.4 5.6
C O A T E D B O L T S IN. L B S . 4.0 5 0 10 14 20 28 46
IWCM S I Z E S
.250 .312 .375 437
.500
.562 .625 .750
N U T S A N D
mmm
0 4
0 6
1
4
1 8
2.4 3.2 4.2
6.2
A L L M E T A L B O L T S I N . L B S . 4.0 S O
12 1 5
2 0
27 35
51
A D H E S I V E O R N Y L O N
N « m
0.4 0.6 1 o 1 .4
1.8
2.6 3.4 5.2
C O A T E D B O L T S I N . L B S . 4.0 5.0 9.0 1 2 15 22 28 4 3
- - - - - - - 5 2 0 0 1 3 - O A
Fig. 8 Torque Chart
@ © ® @ ®
C E N T E R TOP
L O C K L O C K
N Y L O N N Y L O N N Y L O N
P A T C H W A S H E R I N S E R T
INSERT
D R Y
A D H E S I V E
C O A T I N G
T H R E A D
P R O F I L E
D E F O R M E D
N Y L O N
S T R I P
O U T O F
R O U N D
T H R E A D
A R E A
520012-OA ,
Fig. 9
Prevailing Torque Fasteners
CUSTOMARY
METRIC
1/4
W
THREAD MAJOR
DIAMETER IN INCHES
NUMBER OF THREADS
PER INCH
M6.0
THREAD MAJOR DIAMETER
IN MILLIMETRES
DISTANCE BETWEEN
THREADS m MILLIMETRES
THREAD PITCH
_ S 2 0 0 1 0 * A
Fig. 7 Thread Notation