Measuring The Engine Oil Pressure; Checking The Coolant Level - Yamaha FZ8NA Service Manual

EAS20820

MEASURING THE ENGINE OIL PRESSURE

1. Check:
• Engine oil level
Below the minimum level mark "a" → Add
the recommended engine oil to the
proper level.
2. Start the engine, warm it up for several
minutes, and then turn it off.
ECA13410
When the engine is cold, the engine oil will
have a higher viscosity, causing the engine
oil pressure to increase. Therefore, be sure
to measure the engine oil pressure after
warming up the engine.
3. Remove:
• Oil gallery bolt "1"
EWA12980
WARNING
The engine, muffler and engine oil are
extremely hot.
4. Install:
• Oil pressure gauge "1"
• Adapter "2"
Pressure gauge
90890-03153
YU-03153
Oil pressure adapter H
90890-03139
PERIODIC MAINTENANCE
5. Measure:
• Engine oil pressure
(at the following conditions)
Oil pressure
230.0 kPa/5000 r/min (2.30 kgf/
cm²/5000 r/min, 33.4 psi/5000
r/min)
Oil temperature
75.0–95.0 °C (167.00–203.00
°F)
Out of specification → Check.
Engine oil pressure
Below specification
Above specification
6. Install:
• Oil gallery bolt
Main gallery bolt
8 Nm (0.8 m·kgf, 5.8 ft·lbf)
ECA39P1301
Be careful to tighten too much.
EAS21110

CHECKING THE COOLANT LEVEL

1. Stand the vehicle on a level surface.
TIP
• Place the vehicle on a suitable stand.
• Make sure the vehicle is upright.
3-26
Possible causes
• Faulty oil pump
• Clogged oil filter
• Leaking oil passage
• Broken or damaged
oil seal
• Leaking oil passage
• Faulty oil filter
• Oil viscosity too
high