Mitsubishi Lancer Evolution X. Manual - part 66

ON-VEHICLE SERVICE

TSB Revision

ENGINE MECHANICAL

11A-17

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
2. Connect scan tool MB991958 to the data link connector.

3. Disconnect the ventilation hose from the positive crankcase

ventilation (PCV) valve, and then connect a vacuum gauge
to the ventilation hose. Plug the PCV valve.

4. Start the engine and check that idle speed is approximately

700 r/min.

5. Check the intake manifold vacuum.

Limit: Minimum 60 kPa (18 in Hg)

6. Turn off the ignition switch.
7. Remove the vacuum gauge and then connect the ventilation

hose to the PCV valve.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
8. Disconnect scan tool MB991958 from the data link

connector.

TIMING CHAIN ELONGATION VISUAL CHECK

M1111005200121

NOTE: When the timing chain elongates more than the speci-
fied length, the diagnosis code No. P0012, variable valve tim-
ing (VVT) advanced-angle value abnormal, is output. Unless
the diagnosis code No. P0012, therefore, is output, the visual
check is unnecessary.
NOTE: Unless the work using the following scan tool
MB991958 is correctly carried out due to the malfunction of
ECM, carry out the check whether or not the diagnosis code
exists.

AC608435

Data link connector

MB991827

MB991824

MB991910

AK502601AE

Plug

PCV valve

Vacuum gauge

ON-VEHICLE SERVICE

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ENGINE MECHANICAL

11A-18

•

Storing the learning value regarding the amount of timing
chain elongation before the ECM replacement

•

Writing the learning value into the new ECM after the ECM
replacement

1. Remove all the ignition coils.
2. Remove the cylinder head cover.
3. Remove the upper chain guide.

CAUTION

Always rotate the crankshaft clockwise.
4. Rotating the crankshaft clockwise, align the timing mark of

camshaft sprocket with the point on the upper plane of
cylinder head shown in the illustration. As a result of this, the
No.1 cylinder is positioned at the compression TDC.

5. Look at the inside of timing chain case with one eye in the

direction of arrow shown in the illustration. Fix the eye line at
the point where the top axis line of the chain elongation
indicator at the front side of timing chain case is overlapped
with that of the chain elongation indicator at the reverse side
of timing chain case.

AK604565

Timing mark

Timing chain case

AK703387AC

Visual line (visual axis)

Chain elongation
indicator

ON-VEHICLE SERVICE

TSB Revision

ENGINE MECHANICAL

11A-19

6. Check the end top point "A" of timing chain cross section

surface and the point of chain elongation indicator which is
fixed in Step 5. When the end top point "A" of timing chain is
positioned at the left-hand side of chain elongation indicator,
it is unnecessary to replace the timing chain because the
timing chain is within the specified length. When the end top
point "A" of timing chain is positioned at the right-hand side
of chain elongation indicator, it is necessary to replace the
timing chain because the timing chain elongates more than
the specified length.
NOTE: If the timing chain is extended more than the speci-
fied value, the oil pump chain could possibly be extended,
too. The oil pump chain, therefore, must be replaced when
the timing chain is replaced.

7. Install the upper chain guide.

CAUTION

Completely clean the old FIPG remaining in the clearance
between the mating parts.
8. After completely removing the liquid gasket adhering on the

timing chain case, cylinder block and cylinder head,
degrease them with white gasoline.

CAUTION

Install the cylinder head cover within 3 minutes of applying
the liquid gasket.
9. Apply a 4 mm diameter bead of liquid gasket to the point

shown in the illustration.

Specified sealant: THREE BOND 1217G or equivalent.

AK703287AC

Replace

Unnecessary to
replce

Position of visual line

Visual line

End gear face of
timing chain "A"

Chain elongation
indicator

701438

Cylinder head

Timing chain case assembly

φ 4.0 mm

(0.16 in)

φ 4.0 mm (0.16 in)

2.0 mm
(0.08 in)

ON-VEHICLE SERVICE

TSB Revision

ENGINE MECHANICAL

11A-20

10.Installing the cylinder head cover, tighten the tightening bolt

according to the following procedures.

(1) Temporarily tighten the tightening bolt in the order shown

in the illustration.

Tightening torque: 3.0 ± 1.0 N⋅ m (27 ± 8 in-lb)

(2) Tighten the tightening bolt to the specified torque in the

order shown in the illustration.

Tightening torque: 5.5 ± 0.5 N⋅ m (49 ± 4 in-lb)

11.Install the ignition coil.
12.Use the scan tool MB991958 to select the timing chain

maintenance. Initialize the learning value. Refer to
GROUP00, General − Precautions before service − Timing

chain maintenance

P.00-37

NOTE: Carry out the initialization even if the amount of timing
chain elongation is normal. As a result of this, it is necessary to
replace the timing chain before the timing chain interferes with
the other components when the next warning lamp illuminates
or the diagnosis code No. P0012 is output.

AK502760AD

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