Pontiac Fiero 1988 Service Manual page 339

6A2-14
2.8
LITER
V-6
ENGINE
P
CARLINE
JHM-J Install or Connect
1. Manifold - position with upper bolts - 24 N-m (18
lb.ft).
2. Raise car.
3. Manifold - lower bolts - 24 N-m (18 lb.ft.)
4. Front converter heat shield.
5. Lower, car.
6. Crossover bolts - 30 N-m (22 lb.ft.).
7. Manifold heat shield.
8. Brake vacuum hose.
9. Rear compartment lid.
10. Negative battery cable.
REAR
4»f
1.
2.
+4-
Inspect
• For exhaust or vacuum leaks.
Remove or Disconnect
Manifold to crossover bolts.
Manifold bolts and manifold.
Install or Connect
Manifold and manifold bolts - 24 N-m (18 lb.ft.)
Manifold to crossover bolts - 30 N-m (22 lb.ft.)
\ & Inspect
• For exhaust or vacuum leaks.
CROSSOVER PIPE
4 - * | Remove or Disconnect
Rear compartment left side panel.
Intake flex duct - throttle body to elbow.
EGR hose.
Shift cables at transaxle.
EGR tube from exhaust crossover to intake
manifold.
Front and rear crossover shields.
Oxygen sensor connector.
Bolts at front and rear exhaust manifolds.
Raise vehicle.
Bolts at catalytic converter.
Lower vehicle.
Crossover pipe
Oxygen sensor at pipe.
EGR valve and adapter at pipe.
Install or Connect
1
2
3,
4,
5,
6
7
8
9
10,
11
12
13
14,
9.
10.
11.
12.
13.
Front and rear crossover shields.
EGR tube from exhaust crossover to intake
manifold.
Shift cables at transaxle.
EGR hose.
Intake flex duct - throttle body to elbow.
Rear compartment left side panel.
^ Inspect
• For exhaust leaks.
V A L V E M E C H A N I S M
Figure 11
4->
Remove or Disconnect
Rocker arm covers
Rocker arm nuts
• Keep components in a rack so they may be
reinstalled in the same location
Rocker arm pivot balls
Rocker arms
Push rods
Install or Connect
Push rods. Be sure they seat in lifter
Rocker arms
Rocker arm pivot balls
1.
2.
3.
4.
5.
1.
2.
3.
4.
1. Assemble oxygen sensor, EGR valve and adapter
to crossover pipe.
2. Crossover.
3. Crossover to manifold bolts (front and rear) 30
N-m (22 lb.ft).
4. Raise vehicle.
5. Bolts at catalytic converter - 20 N-m (15 lb.ft.).
6. Lower vehicle.
Important
• Coat bearing surfaces of rocker arms and
pivot balls with "Molykote" or equivalent.
Rocker arm nuts until lash is eliminated
Adjust
Rotate engine until mark on torsional
damper lines up with "O" mark on the
timing tab, with the engine in the # 1 firing
position. This may be determined by placing
fingers on the # 1 rocker arms as the mark
on the damper comes near the "O" mark. If
the valves are not moving, the engine is in
the # 1 firing position.
With the engine in the # 1 firing position,
the following valves may be adjusted.
Exhaust - 1, 2, 3
Intake — 1, 5, 6
Back out adjusting nut until lash is felt at
the push rod, then turn in adjusting nut
until all lash is removed (Figure 12). (This
can be determined by rotating push rod
while turning adjusting nut). When lash has
been removed, turn adjusting nut in 1 1/2
additional turns (to center lifter plunger).
Crank the engine one revolution until the
timing tab "O" mark and torsional damper
mark are again in alignment. This is the # 4
firing position. With the engine in this
position, the following valves may be
adjusted:
Exhaust - 4, 5, 6