2-20 PERIODIC MAINTENANCE
PCV SYSTEM
NOTE:
Be sure to check for any obstruction in the PCV valve or its hose
before checking engine idle speed/IAC duty.
An obstructed PCV valve or hose prevents proper operation of
these items.
PCV HOSE
Check crank case ventilation hoses (breather hose) and PCV
hoses for connection, leakage, cracks, clog or deterioration.
Check for sticking or clogged PCV valve. Replace as necessary.
PCV valve inspection
1. Disconnect PCV valve from cylinder head cover.
2. Run engine at idle.
3. Place your finger over end of PCV valve to check for vac-
uum.
If there is no vacuum, check for clogged valve. Replace as
necessary.
4. After checking vacuum, stop engine and remove PCV valve
from hose.
Shake valve and listen for the rattle of check needle inside
the valve.
If valve does not rattle, replace valve.
5. After checking, connect PCV valve, PCV hose and tighten
clamps securely.
• Inspect initially after 20 hours (1 month) and every
50 hours (3 months).
• Replace every 2 years.
1
2
1. PCV valve
2. PCV hose
3
3. Breather hose
1
1. PCV valve
1
1. PCV valve
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