Pontiac Fiero 1988 Service Manual page 307

6A1-6 2.5L ENGINE
b. Apply compressed air to hold valves m
place.
c. Using tool J5892-A, or modified J5892-1,
compress the valve spring.
d. Remove locks.
e. Carefully release spring pressure.
f. Remove tool.
g. Remove cap and spring.
h. Valve stem seal.
Install or Connect
Valve stem components.
a. Valve stem seal.
b. Assemble spring and cap.
c. Using tool J5892-A, or modified J5892-1,
compress the valve spring.
d. Insert locks.
e. Carefully release spring pressure. Be sure
locks are in place.
• See Section 6A General Engine
Mechanical for detail of valves and
spring specification.
• Assemble used parts in original
locations.
Release air pressure, and remove J23590.
Spark plugs.
Rocker arms.
Rocker arm cover.
* \ Inspect
2.
3.
4.
5.
• For oil leaks.
• For proper completion of repair.
INTAKE MANIFOLD
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
Remove or Disconnect
Negative battery cable.
Air cleaner.
PCV valve and hose at TBI.
Coolant.
Fuel lines (see Section 6C).
Vacuum hoses.
From TBI assembly.
• Wiring.
• Throttle linkage.
Linkage - transaxle downshift.
Cruise control and linkage - if applicable.
Throttle linkage and bell crank - place on one side
for clearance.
Heater hose.
Retaining bolts and intake manifold.
Clean
• All gasket surfaces on cylinder head and
intake manifold.
Install or Connect
3.
4.
5.
6.
7.
9.
10.
11.
12.
13.
Retaining bolts and washers. Tighten to
specification.
Heater hose.
Throttle linkage and bell crank.
Cruise control and linkage, if fitted.
Linkage - transaxle downshift.
To TBI assembly.
• Wiring.
• Throttle linkage.
Vacuum hoses.
Fuel lines.
Engine coolant.
PCV valve and hose at TBI.
Air cleaner.
Negative battery cable.
Inspect
• For fluid and vacuum leaks.
V A L V E LIFTERS
Remove or Disconnect
1. Rocker arm cover.
2. Intake manifold.
3. Push rod cover.
4. Loosen rocker arms, rotate to clear push rods (in
pairs, so that lifter guide can be removed).
5. Remove push rods.
6. Retainer and guide.
7. Remove lifter.
f Important
• Identify component
reassembly.
location for
Inspect
1.
2.
3.
4.
5.
For inspection and overhaul of valve lifters
refer to Section 6A General Engine
Mechanical.
Clean
If new lifter is to be installed, clean all sealer
coating from inside of new lifter.
Install or Connect
Lubricate bearing surfaces with engine oil.
Lifters in lifter bore.
Guide and retainer.
Push rods.
Position rocker arms and guides.
Tighten
1. Intake manifold, with new gasket.
6.
7.
8.
• With lifter on base circle of camshaft,
tighten rocker arm bolts 32 N*m (24 lb. ft).
Push rod cover.
Intake manifold.
Rocker arm cover.