Mitsubishi 2013 Outlander Service Manual page 28

11-8
VALVE RELATION
Exhaust camshaft
Valve stem seal
Exhaust valve
The valve mechanism is based on a 4-valve DOHC
(Double Over Head Camshaft) design having the
camshaft on the upper valve. Each cylinder has two
intake valves and two exhaust valves, arranged in a
V-shape pattern.
Camshaft rotation is transmitted via valve tappets to
the respective valves which open and close accord-
ingly.
1. CAMSHAFT
2. VALVE TAPPET
• Valve tappets are available in 47 thicknesses, at
0.015 mm intervals between 3.000 mm and 3.690
mm, to ensure correct valve clearance.
ENGINE MECHANICAL
BASE ENGINE
Valve tappet
3. VALVE
• The valves have heat-resistance. The entire
valve surface is treated with nitriding.
4. VALVE STEM SEAL
• The valve stem seals are integrated with the
valve spring seats.
• The valve stem seal portion excels in sealing per-
formance and is equipped with a spring to pre-
vent oil from descending.
5. VALVE SPRING
• The valve spring has a dual pitch spring to pre-
vent surging in the high speed range.
Inlet camshaft
Valve spring
Inlet valve
AK502499
AJ