64
TK 61555-2-MM-EN
9.
Check and adjust the exhaust valve for the number two cylinder, the intake valve for the
number three cylinder, and both valves for the number four cylinder.
10. Replace the rocker arm cover, the cover for the timing mark access hole, and tighten the fuel
injection lines when finished.
Valve Adjustments and Cylinder Configurations
Rear Flywheel
End
Front Pulley End
Cylinder Number
1
2
3
4
Valve arrangement
E
I
E
I
E
I
E
I
Piston in No. 1 cylinder is at TDC on
compression stroke
Piston in No. 4 cylinder is at TDC on
compression stroke
Crankcase Breather
Gases formed in the crankcase are directed to the intake manifold. Harmful vapors that would
otherwise collect in the crankcase and contaminate the oil, or escape to the outside, are drawn
back into the engine and burned.
The crankcase breather is located in the valve cover. A restrictor is cast into the fitting for the
breather hose on the intake manifold. The restrictor limits the flow of gases from the crankcase to
the intake manifold and keeps the crankcase pressure from getting too low in vacuum. A breather
hose connects the crankcase breather to the intake manifold.
Figure 39.
Crankcase Breather
1.
Breather Hose
5.
Baffle Breather
2.
Insulation
6.
Baffle Plate
3.
Breather Cover
7.
Intake Manifold
4.
O-Ring
8.
Restrictor Location
Normal crankcase pressures with a new air cleaner are 0 to 300 mm (0 to 12 in.) H
2
O of vacuum.
The vacuum will increase as the air cleaner gets dirty and becomes more restrictive. Check the air
restriction indicator before checking the crankcase pressure. Replace the air cleaner if the reading
on the air restriction indicator exceeds 508 mm (20 in.) H
2
O of vacuum. A dirty air cleaner may
cause excessive vacuum, leading to oil carry over and high oil consumption.
