6. Intake And Exhaust Valve Clearance (Inspect And Adjust)

WARNING: This page is about a different variant/trim than selected.

NOTE: Perform the valve clearance check and adjustment at the engine cold state.

Remove all of the ignition coils.
Remove the cylinder head cover.
CAUTION: Turn the crankshaft always clockwise.
Turn the crankshaft clockwise, and align the timing mark on the exhaust camshaft sprocket against the upper face of the cylinder head as shown in illustration. Therefore, No. 1 cylinder goes to the compression top dead center.

Fig 1: Aligning Timing Mark On Exhaust Camshaft Sprocket
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Using a thickness gauge, measure the valve clearance with the arrow shown in illustration. If deviated from the standard value, make note for the valve clearance.
Standard value:

Intake valve 0.20 ± 0.03 mm (0.008 ± 0.0012 inch)

Exhaust valve 0.30 ± 0.03 mm (0.012 ± 0.0012 inch)

Fig 2: Identifying Intake And Exhaust Valve Clearance
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Turn the crankshaft clockwise 360 degrees, and put the timing mark on the exhaust camshaft sprocket in position shown in illustration. Therefore, No. 4 cylinder goes to the compression top dead center.

Fig 3: Identifying Timing Mark On Exhaust Camshaft Sprocket
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Check the valve clearance with the arrow shown in illustration. In the same procedure as 4.
If the valve clearance is deviated from the standard value, remove the camshaft and the valve tappet. For the camshaft removal, refer to CAMSHAFT REMOVAL AND INSTALLATION .

Fig 4: Identifying Intake And Exhaust Valve Clearance
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Using a micrometer, measure the thickness of the removed valve tappet.
Calculate the thickness of the newly installed valve tappet through the following equation.
1. thickness of newly installed valve tappet
2. thickness of removed valve tappet
3. measured valve clearance
  Equation
  
  Intake valve: A = B + [C - 0.20 mm (0.008 inch)]
  
  Exhaust valve: A = B + [C - 0.30 mm (0.012 inch)]
  
  NOTE: The valve tappet ranges 3,000 - 3,690 mm (0.1181 - 0.1453 inch) and has 47 types per 0.015 mm (0.0006 inch). The thickness below a decimal point is stamped on the reverse side of the valve tappet.
  
  Fig 5: Measuring Thickness Of Valve Tappet
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Install the valve tappet selected through the procedure 9, and put the camshaft in position. For the camshaft installation, refer to CAMSHAFT REMOVAL AND INSTALLATION .
After installing the timing chain, measure the valve clearance using the procedure 3 to 6. Confirm the clearance is within the standard value.

Fig 6: Identifying Thickness Stamp
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

CAUTION: Completely remove all the old FIPG, which might be remaining among the components.
After completely removing the liquid gasket adhering on the timing chain case, cylinder block and cylinder head, degrease them with white gasoline.
CAUTION: The cylinder head cover should be installed within 3 minutes of applying liquid gasket.
Apply a 4 mm bead of liquid gasket as illustrated.
Specified sealant:

THREE BOND 1217G or equivalent

Fig 7: Identifying Liquid Gasket Applying Area
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Install the cylinder head cover and tighten the tightening bolts using the following procedures.
1. Temporarily tighten to the following torque in order shown in the illustration.
  Tightening torque: 3.0 ± 1.0 N.m (27 ± 8 in-lb)
2. Tighten to the specified torque in order shown in the illustration.
  Specified torque: 5.5 ± 0.5 N.m (49 ± 4 in-lb)
Install the ignition coils.

Fig 8: Identifying Cylinder Head Cover Bolts Tightening Sequence
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.