Chrysler DODGE D150 1993 Service Manual page 1486

• EMISSION CONTROL SYSTEMS 25 - 9
(4) Turn engine off and remove PCV valve from
cylinder head (valve) cover. The valve should rattle
when shaken (Fig. 11).
Fig. 11 Shake PCV Valve-Typical
Replace the PCV valve and retest the system if it
does not operate as described in the preceding tests.
D o n o t a t t e m p t to c l e a n t h e old P C V v a l v e .
(5) If the paper is not held against the opening in
cylinder head (valve) cover after new valve is in­
stalled, the PCV valve hose may be restricted and
must be replaced. The passage in the intake manifold
must also be checked and cleaned.
To clean the intake manifold fitting, t u r n a 1/4
inch drill (by hand) through the fitting to dislodge
any solid particles. Blow out the fitting with shop
air. If necessary, use a smaller drill to avoid remov­
ing any metal from the fitting.
CRANKCASE BREATHER/FILTER-GAS POWERED
ENGINES
The crankcase breather/filter (Fig. 12) is located on
the cylinder head (valve) cover. It must be kept clean
and lubricated. At the recommended interval, remove
the filter and wash it thoroughly in kerosene or sim­
ilar solvent. Lubricate or wet the filter by inverting
it and filling with SAE 30 engine oil. Filter must
then be thoroughly drained. More frequent service
may be necessary for vehicles operated extensively
on short run, stop and go or extended engine idle ser­
vice.
The filter must be replaced at correct intervals. Re­
fer to Lubrication and Maintenance, Group 0 in this
service manual.
8925-28
Fig. 12 Crankcase Breather/Filter—Gas Powered
Engines