| Fig. 1: Check the PCV valve for vacuum at idle
|
The PCV valve should be checked at regular intervals and replaced as required.
If the valve is found to be defective, do not clean, replace it. Connection
and system hoses can be cleaned by using compressed air. Check all hoses for
clogging, split or hardening condition. Replace as necessary.
- With the engine running, remove the valve from its mounting. A hissing sound
should be heard and vacuum should be felt from the inlet side of the valve.
- Reinstall the valve. Remove the crankcase inlet air cleaner. Loosely hold
a piece of stiff paper over the opening in the rocker cover. Allow one minute
for the crankcase pressure to reduce. The paper should then be pulled against
the rocker cover with noticeable force. Replace the inlet air cleaner in the
rocker cover.
- With the engine stopped, remove the PCV valve and shake. A clicking sound
should be heard indicating that the valve is not stuck.
- If the valve fails any of the above tests, it should be replaced.
Clean the hoses and calibrating orifice internally. Blow away foreign matter
with compressed air. Check the hoses for cracks, fatigue and swelling. Replace
if necessary.
