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Home >> Pontiac >> 1993 >> Firebird V6-204 3.4L >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Cylinder Head Assembly >> Service and Repair >> Valve Springs and Stem Seals

Valve Springs and Stem Seals

VALVE SPRINGS AND STEM SEALS










Tools Required:
- J 23590 Spark Plug Port Adapter
- J 5892-C Valve Spring Compressor (Head-On)
- J 23738-A Valve Stem Seal Tester


Remove or Disconnect

1. Valve rocker arms and pushrod assemblies at cylinder to be serviced.
- Refer to "Valve Rocker Arms and Pushrod Assemblies".

2. Spark plug at cylinder to be serviced.
3. Install 3 23590 to spark plug hole and apply compressed air to hold valve (125 or 132) in place.

NOTICE: When using the valve spring compressor, be careful not to scratch or gouge the valve stem.

4. Compress valve spring (128 or 135) using J 5892-C (Figure 23).
5. Valve stem key (131 or 139).
6. Valve spring cap (130 or 138), and oil shield (137) on exhaust valves.
7. Valve spring (128 or 135) and dampener (127 or 134).
8. Intake valve stem oil seal (126).
9. Valve stem 0-ring seal (129 or 136).


Install or Connect

1. Intake valve stem oil seal (126) and seat seal cylinder head, or valve spring shim, if equipped.
2. Valve stem 0-ring seal (129 or 136).
3. Valve spring dampener (127 or 134) and spring (128 or 135).
4. Valve spring oil shield (137) on exhaust valve and valve cap (130 or 138).
5. Compress valve spring (128 or 135) using J 5892-C.
6. Valve stem key (131 or 139).
A. Use grease to hold key in place while disconnecting J 5892-C.
B. Remove J 23590.
C. Make sure key seats properly in upper groove of valve stem.
D Tap end of stem with a plastic-faced hammer to seat key, if necessary.

7. Spark plug.
- Tighten Spark plug to 15 N.m (11 lb. ft.).

8. Valve rocker arms and pushrod assemblies.
- Refer to "Valve Rocker Arms and Pushrod Assemblies".


Inspect
- Valve stem 0-ring seal (129 or 136) for leaks.
- Place J 23737-A in position over end of valve stem and against valve spring cap (130 or 138).
- Operate J 23738-A and make sure no air leaks past valve stem 0-ring seals (129 or 136).


Measure
- Valve spring installed height.
- Use a narrow, thin scale and measure from bottom of valve spring (128 or 135) on dampener lip to bottom inside of oil shield (137) for exhaust valve (132) and to top of valve spring cap (130) for intake valve (125).
- If measurement exceeds specified height, install valve spring seat shims as necessary. Do not shim so height is less than specified.

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