Pontiac Fiero 1988 Service Manual page 285

6A-8 GENERAL ENGINE MECHANICAL
DISPLACEMENT
2.0L
2.5L
2.8L
3.8 L
3.0L
5.0L
4.3L,5.0L
ENGINE VIN CODE K , M R,
U 9 , W , S A L Y
Z, H, G, F
LASH
I N
M M
0 . 0 0 4 - 0 . 0 0 8
0 . 1 0 - 0 . 2 0
0 . 0 0 9 - 0 . 0 1 5
0 . 2 3 - 0 . 3 8
0 . 0 0 9 - 0 . 0 1 5
0 . 2 3 - 0 . 3 8
0 . 0 0 1 5 - 0 . 0 0 3
0 . 0 3 8 - 0 . 0 7 6
0 . 0 0 6
0 . 1 5 2
0 . 0 0 0 4 - 0 . 0 0 7
0 . 0 1 - 0 . 1 9 0
. 0 0 3 7 - . 0 0 7 7
. 0 9 - 2 0
D E P T H
I N
M M
0 . 3 9 5 - 0 . 3 9 7
1 0 . 0 3 - 1 0 . 0 8
0 . 9 9 5 - 0 . 9 9 8
2 5 . 2 7 - 2 5 . 3 5
1 . 1 9 5 - 1 . 1 9 8
3 0 . 3 6 - 3 0 . 4 4
0 . 8 6 8 - 0 . 8 7 0
2 2 . 0 4 - 2 2 . 1 0
0 . 4 6 1 - 0 . 4 6 2
1 1 . 7 1 - 1 1 . 7 3
1 . 5 0 0 - 1 . 5 0 9
3 8 . 1 0 - 3 8 . 1 2 5
D I A M E T E R
I N
M M
3 . 2 3 0 - 3 . 2 3 5
8 2 . 0 2 - 8 2 . 1 5
1 . 5 0 3 - 1 . 5 0 6
3 8 . 1 8 - 3 8 . 2 5
-
1 . 6 7 0 - 1 . 6 7 5
4 2 . 4 - 4 2 . 5
3 . 5 0 8 - 3 . 5 1 2
8 9 . 1 0 - 8 9 . 2 0
1 . 5 3 4 - 1 . 5 3 9
3 8 . 9 6 0 - 3 9 . 0 9 6
L E N G T H
I N
M M
0 . 3 9 3 - 0 . 3 9 4
9 . 9 8 - 1 0 . 0
0 . 9 9 9 - 1 . 0 0 2
2 5 . 3 7 - 2 5 . 4 5
1 . 1 9 9 - 1 . 2 0 0
3 0 . 4 5 - 3 0 . 4 8
0 . 8 7 2 - 0 . 8 7 4
2 2 . 1 5 - 2 2 . 2 0
0 . 4 5 9 - 0 . 4 6 0
1 1 . 6 6 - 1 1 . 6 8
1 . 5 0 7 5 - 1 . 5 0 9 5
3 8 . 2 9 - 3 8 . 3 4 1
-
D R I V E G E A R
( I N N E R )
I N
M M
2 . 3 1 7 - 3 . 3 1 9
5 8 . 8 5 - 5 8 . 9 0
1 . 4 9 6 - 1 . 5 0 0
3 8 . 0 5 - 3 8 . 1 0
1 . 4 9 8 - 1 . 5 0 0
3 8 . 0 5 - 3 8 . 1 0
1 . 6 6 4 - 1 . 6 6 6
4 2 . 2 6 - 4 2 . 3 2
2 . 8 3 9
7 2 . 1 1
1 . 5 2 9 - 1 . 5 3 1
3 8 . 8 3 6 - 3 8 . 8 8 7
-
Q C
I D L E R G E A R
( O U T E R )
I N
M M
3 . 2 2 5 - 3 . 2 2 7
8 1 . 9 1 0 - 8 1 . 9 6 4
1 . 4 9 8 - 1 . 5 0 0
3 8 . 0 5 - 3 8 . 1 0
1 . 6 6 4 - 1 . 6 6 6
4 2 . 2 6 - 4 2 . 3 2
3 . 5 0 0 - 3 . 4 9 7
8 8 . 9 0 - 8 8 . 8 2
1 . 5 2 9 - 1 . 5 3 1
3 8 . 8 3 6 - 3 8 . 8 8 7
-
L U
o
m
o
- 5
D R I V E G E A R
I N
M M
0 . 0 1 4 - 0 . 0 1 8
0 . 0 3 5 - 0 . 0 4 5
0 . 0 0 4 m a x .
0 . 1 0 m a x .
0 . 0 0 3 - 0 . 0 0 4
0 . 0 8 - 0 . 1 0
0 . 0 0 3 - 0 . 0 0 5
0 . 0 8 - 0 . 1 3
0 . 0 0 1 5 - 0 . 0 0 4 5
0 . 0 4 0 - 0 . 1 2 0
. 0 0 4 m a x .
. 1 0 m a x .
I D L E R G E A R
I N
M M
0 . 0 0 4 - 0 . 0 0 7
0 . 1 1 - 0 . 1 9
0 . 0 0 4 m a x .
0 . 1 0 m a x .
0 . 0 0 3 - 0 . 0 0 4
0 . 0 8 - 0 . 1 0
0 . 0 0 3 - 0 . 0 0 5
0 . 0 8 - 0 . 1 3
0 . 0 0 1 5 - 0 . 0 0 4 5
0 . 0 4 0 - 0 . 1 2 0
E N D C L E A R A N C E
I N
M M
0 . 0 0 1 - 0 . 0 0 4
0 . 0 3 - 0 . 1 0
0 . 0 0 2 - 0 . 0 0 5
0 . 0 5 - 0 . 1 3
0 . 0 0 2 - 0 . 0 0 5
0 . 0 5 - 0 . 1 3
0 . 0 0 2 - 0 . 0 0 6
0 . 0 5 - 0 . 1 5
0 . 0 0 1 - 0 . 0 0 3 5
0 . 0 2 5 - 0 . 0 8 9
0 . 0 0 2 5 - 0 . 0 0 6 5
0 . 0 6 3 - 0 . 1 6 5
. 0 0 6 m a x .
. 1 5 m a x .
I N N E R G E A R T I P C L E A R A N C E
IN
M M
0 . 0 0 6
0 . 1 5 2
-
-
O U T E R G E A R
D I A M E T E R C L E A R A N C E
I N
M M
0 . 0 0 8 - 0 . 0 1 5
0 . 2 0 3 - 0 . 3 8 1
V A L V E T O B O R E C L E A R A N C E
I N
M M
0 . 0 0 1 5 - 0 . 0 0 3 5
0 . 0 3 8 - 0 . 0 8 9
0 . 0 0 1 5 - 0 . 0 0 3 5
0 . 0 3 8 - 0 . 0 8 9
0 . 0 0 4 - 0 . 0 0 8
0 . 1 0 2 - 0 . 2 0 3
0 0 0 4 - 0 . 0 0 8
0 . 1 0 2 - 0 . 2 0 3
0 . 0 0 2 5 - 0 . 0 0 5 0
0 . 0 6 3 - 0 . 1 2 7
H20001-6A
Figure 16 Oil Pump Specification
G20015 6A
1 - DEPTH OF POCKET
2— DIAMETER OF POCKET
G20016-6A
Figure 17 Measuring Oil Pump Gear Lash
Figure 18 Measuring Oil Pump Gear Pocket
Clean
• All parts in cleaning solvent. Remove
varnish, sludge and dirt.
$ All traces of old gasket material.
| W Inspect
• Pump cover and housing (crankcase front cover)
for:
Cracks
Scoring
Porous or damaged casting
Damaged threads
Excessive wear or galling.
• Pressure regulator valve for:
Scoring
Sticking in the valve bore
Burrs
• Pressure regulator valve spring for:
Tension loss
Bending
If in doubt, replace spring
• Gears for: