5. Inspection and servicing of basic engine parts
105R1
5.1.4 Replacement of cap plugs
Step
No.
Description Procedure Tool of material used
1 Clean and remove grease from the hole into
which the cap plug is to be driven.
(Remove scale and sealing material previously
applied.)
Screw driver or saw
blade
Thinner
2 Remove grease from the cap plug. Visually check the nick
around the plug.
Thinner
3 Apply Threebond No.4 to the seat surface where
the plug is to be driven in.
Apply over the whole
outside of the plug.
Threebond No.4
4 Insert the plug into the hole. Insert the plug so that it
sits correctly.
5 Place a driving tool on the cap plug and drive it in
using a hammer.
*Using the special tool, drive the cap plug so that
the edge of the plug is 2 mm (0.0787 in) below the
cylinder surface.
Drive in the plug parallel
to the seating surface.
• Driving tool
• Hammer
Remove foreign
materials with a
screw driver
or saw blade.
2-3 mm
3 mm 100 mm
D
d
Plug dia. d D
mm
12 11.9-12.0 20
30 29.9-30.0 40
45 44.9-45.0 55
25 24.9-25.0 35
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