Cylinder Heads And Valve Mechanisms - Disassemble And Inspect - Mitsubishi S6R Series Service Manual

1. Cylinder Heads and Valve Mechanisms - Disassemble and Inspect

Understanding of the current engine condition before disassembling is very important to know the cause of trouble and do the
efficient work.
Depending on the maintenance work or purpose, it is desirable to inspect some of the following items before proceeding with
any job.
Valve Clearance - Inspect
Fuel Injection Timing - Inspect
Clearance Between Bottom Face of Valve Bridge and Top Face of Valve Rotator - Inspect
Valve Sinkage - Measure
Replace
Crack, oil leak,
settling
16
Crack, oil leak,
scale deposit
Wear, oil hole clogging
Wear
7
20
24
25
26
27
28
Exhaust
Double spring spec
Disassembling Sequence
1 Rocker cover
2 Fuel inlet connector
3 Washer, nut
4 Nozzle gland
5 Fuel injection nozzle
6 Gasket
7 Adjusting screw
8 Bolt
9 Rocker arm
10 Spacer
11 Rocker shaft
1
Crack, carbon deposit,
Replace
flaw, scale deposit
8
Flaw
11
10
9
12
13
20
21
22
Settling, crack
23
Cylinder Heads and Valve Mechanisms - Disassemble and Inspect
12 Bridge cap
13 Valve bridge
14 Push rod
15 Water outlet connector
16 Rocker case
17 Cylinder head bolt
18 Cylinder head (Approx 35 kg [77.2 lb])
19 Inlet port packing
20 Valve cotter
21 Valve rotator
22 Valve spring
Chapter 5 DISASSEMBLY OF BASIC ENGINE
15
Replace
17
18
19
Contact, wear
Stem and seat face wear,
corrosion, flaw,
carbon deposit
Crack, flaw, settling,
rubber crack
Replace
Replace
Wear
Replace
Wear at both ends,
29
bend
Cam contact face
and outer peripheral
contact face wear
Replace
30
23 Stem seal
24 Valve rotator
(24 to 28 exhaust double spring spec)
25 Inner valve spring
26 Outer valve spring
27 Lower retainer
28 Stem seal
29 Valve
30 Cylinder head gasket
31 Tappet
Chapter 5 DISASSEMBLY OF BASIC ENGINE
3
4
5
2
6
14
31
5-3