Page 35 - E BOOK ENGINE MECHANICAL M2

5. SERVICE POINTS OF 4B1 ENGINE COMPONENT

<Valve Spring Retainer Lock Removal & Installation>
1. Screw in special tool retainer holder attachment
(MB992090) to special tool valve spring compressor
(MD998772), and assemble special tool retainer holder C
(MB992089).
2. Install special tool MD998772 (with special tools
MB992090 and MB992089 attached) to the cylinder head
and compress the valve spring. Then, remove the valve
spring retainer lock.
When removing the valve spring retainer lock,
leave the piston of the cylinder in the TDC (Top
Caution Dead Centre) position. The valve may fall into
the cylinder if the piston is not properly in the
TDC position.
3. Use special tool valve spring compressor (MD998772)
with special tool retainer holder attachment (MB992090)
and special tool retainer holder C (MB992089) attached
to compress the valve spring, and install the valve spring
retainer lock.
Fig. 5-21

<Valve Stem Seal Removal>
Use special tool Valve stem seal pliers (MB992085) to
firmly pinch the base (larger external shape) of the stem
seal and twist it right and left for pulling out.

Fig. 5-22

<Valve Stem Seal Installation>
1. Apply a thin coat of engine oil to a new valve stem
seal.
The valve stem seal must not be reused.
Do not damage the tappet wall during assem-
bly.
Be sure to use a special tool to install the valve
Fig. 5-23 Caution
stem seal. Poor installation causes oil loss via
valve guides.
If oil is not applied, the valve stem seal may
rise to the surface after it is press fitted.

2. Use special tool Valve stem seal installer
(MD998737) to press fit the valve stem seal into the
valve guide with the valve stem used as a guide.

Fig. 5-24

5 - 8 Pub. No. PTAE1225