VI EMlSS 0lI CUNTIIULS EXHAUST SYSTEMS MI ZT izsso i SS S it S S SS is it I n V Atv vacuuahl pgv 7 ih rasrl n J fain souncz vatve L V yu 3 NON ENTED AT INSTALLED e l r ou u r sn cansunsron iu Imax t 1 iuww CAP Mamrotn 1 4 L ix tE r r n r r ya 4 V e 1 li e si 1 t V N Fe l f i S I si 4 eyy ir s S is all l ti 7 Q vg ig 7 6 4 g lj r E V S a V j l VT L W il i LL i nose I Il a Ll g s Y r l e x e Am r 4 7 4 Alum man za rcv vuvnei vcv vnvs naw cnnm N INE Pasnlva crankcm Vontllatlnn PCV Valvu M N F0LD an mw crm Two PCV valves with different flow rates cfm are VACUUM used The black valve is used on all V 8 engines and Il HUJ Bluk v I Su V I the silver valve is used on all six cylinder engines 20 1 35 1 65 1 3 1 7 The PCV valve must be replaced at l5 000 mile in 13 1135 165 1 3 1 7 tervals on Cherokee Wagoneer and truck models and 16 1 35 1 65 11317 30 000 mile intervals on CJ models as specified in the 14 1 35 1 65 1 3 1 7 Mechanical Maintenance Schedule All hoses in the 12 135 22 1 3 1 7 PCV system should be inspected at this time for leaks 10 1 g 2 g 1 3 1 7 or restrictions and cleaned or replaced as required g 2 5 35 1 3 1 7 PCV valve replacement may be required more often 6 2 g 40 1 3 1 7 under adverse operating conditions 3 3 3 4 4 1 7 PGV VALVE TEST PIIV AIII INLET FILTER MAINTENANCE The valve may be tested at idle speed for correct flow rate cfm providing the engine manifold vacuum is at least 14 inches Hg When checking vacuum con MWLDED nect the gauge to a fitting which is as centrally HDSE located as possible on the intake manifold A Remove the valve from the grommet in the intake manifold V 8 or cylinder head cover six cylinder and connect the plastic hose of PCV Valve Tester V J 23111 to the valve fig 4A 23 NOTE The PCV valve must be held in ct horizontal INLET position and tapped lightly during the test Hold the Flu ER g tester in o vertical position Start the engine and allow it to idle and observe the flow rate cfm Refer to PCV Valve Flow Chart A valve which flows above or below specification AJ 9 must be replaced The correct PCV valve should be used for replacement FI 4A Z4 PCV Alr Inlll FIIl r SIX DyIInlI r