Cylinder Head Assemble

Tools Required 

J 38606  Valve Spring Compressor. See Special Tools and Equipment .

Fig 1: Valve Locks, Caps, Seats & Spring
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: Use oversize valve stem seals if you install oversize valves.
1. Lubricate the valve stem with clean engine oil.
2. Install the valves.
3. Lightly lap the reconditioned valves into the valve seat.
4. Install the valve stem oil seals.
5. Install the valve springs.
6. Install the valve spring caps.
Fig 2: Compressing Valve Springs
Courtesy of GENERAL MOTORS CORP.
7. Compress the valve springs using the J 38606  . See Special Tools and Equipment .
8. Install the valve spring cap keys.

   Hold the valves in place with grease, if necessary.

9. Release the valve springs.
10. Ensure that the valve locks are seated.
11. Measure valve spring installed height.
12. If the valve spring installed height is not within specifications install 0.25 mm (0.010 in) rocker arm shims as needed. If more than 2 shims are needed replace the cylinder head or valve.
Fig 3: Removing/Installing Fuel Line Bracket
Courtesy of GENERAL MOTORS CORP.
NOTE: In order to avoid damage, install the spark plugs after the cylinder head has been installed on the engine.
13. Install the fuel line bracket.
NOTE: Refer to Fastener Notice in Cautions and Notices.
14. Install the fuel line bracket bolt or stud.

    Tighten:  Tighten the fuel line bracket bolt or stud to 50 N.m (37 lb ft).