Mitsubishi Lancer Evolution 8. Manual - part 24

16

4G6 – WATER PUMP, WATER PIPES

Key Points for Fitting

Fitting thermostat housing

(1) Squeeze liquid gasket (thickness 3mm) into area indicated

in drawing.
Liquid gasket brand:
MZ100191 or equivalent

(2) Tighten bolts indicated by j on drawing, to specified torque,

23 ± 4 N

•

m.

(3) Tighten water inlet pipe bolt (k), using fixing on pipe, to

specified torque, 5.0 ± 1.0 N

•

m.

(4) Bolt l was tightened when fitting air control valve bracket

was fitted (See Page 13).

Fitting water outlet fitting

Squeeze liquid gasket (thickness 3 mm) into area shown in
drawing.

Liquid gasket brand:
MZ100191 or equivalent

A



B



17

4G6 – CYLINDER HEAD / VALVES

Cylinder Head / Valves

Checks

Valve springs
(1) Measure free height of spring. If it is above limit, replace

valve spring.
Standard height: 50.4 mm
Limit: 49.4 mm

(2) Measure perpendicularity of spring. If it is ‘leaning’ by more

than the permitted limit, replace the valve spring.
Standard variance from perpendicular: 
Within 2.0˚
Limit: 4˚

Perpendicularity

Free height

18

4G6 – PISTONS, CONNECTING RODS

Pistons, Connecting Rods

Removal / Fitting

Removal Order
1. Connecting rod cap nut

7. Piston ring No. 2

2. Connecting rod cap

8. Oil ring

3. Connecting rod bearing

9. Piston pin

4. Piston connecting rod

10. Piston

5. Connecting rod bearing

11. Connecting rod

6. Piston ring No. 1

12. Bolt

Smear engine oil on
all sliding sections
when fitting

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A



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19

4G6 – PISTONS, CONNECTING RODS

Fitting oil ring

1.  Fit oil ring spacer into piston ring groove, then ft upper side

rail, and finally fit lower side rail.

NB:
(1) Fit them so that the side rail / spacer gaps are in the
positions shown in the drawing.
(2) Mark (new) spacers and side rails with distinguishing
colour (shown in chart below) to denote their sizes.

2. Tip for fitting side rails: First insert one end of rail into piston

groove. Then, holding this end with your thumb, as shown in
the drawing, push the rest of it in.

Warning
Like the other piston rings, opening the side rails out
with ring expanders may cause them to break.

3. After fitting the side rail on the piston, check that it rotates

smoothly in both directions.

Size

Colour

S.T.D.

None

0.50 mm O.S.

Red

1.00 mm O.S.

Yellow

Upper
side
rail
gap

Lower
side
rail
gap

Spacer gap

End of side rail

A