Mitsubishi 3000GT 1991 Service Manual page 88

ENGINE
SERVICE POINTS OF INSTALLATION
15.13. INSTALLATION OF VALVE STEM SEAL
Install the spring seat, then using the special tool, install the
stem seal by lightly tapping the tool.
Caution
1. Incorrect installation of the seal without using the
special tool will result in poor sealing and cause oil
leakage down valve guide.
Do not reuse stem seal.
2.
11.7. INSTALLATION OF VALVE SPRING
Valve springs should be installed with the enamel coated
side toward the valve spring retainer.
9. 5. INSTALLATION OF RETAINER LOCK
Using the special tool, install the retainer lock
4. INSTALLATION OF CYLINDER. HEAD GASKET
Identification mark:
<Non-Turbo>
<Turbo>
TSB Revision
2DN
2DT