F2 EXHAUST EMISSION CONTROL SYSTEMS 6 i 0 IIIIi I L 4 SS I kr e i vie it e 9 1 S V 774 i r 7 K IIII IIII I IIII I IIII Q ire I j JL 1 I 9 o o e e GB g F g I 6 r 1 Q 14024 FIG F2 5 COLD AND HOT AIR DOORS PARTIALLY OPEN 1 Motor 8 Diaphragm 2 Air Cleaner 9 Control Damper 3 Sernsor 10 Linkage 4 Temp Sensing Spring 11 Air Inlet 5 Air Bleed Valve l2 Vacuum Chamber 6 Hot Air Pipe 13 Snorkel Tube 7 Diaphragm Spring St8tlOI 18I y Hlld to 1 I13l SLlI the gasket seals SySt 1 1 l V3Cl 1I 1I1 1 1 TlOtOI OI SEHSOI USG thi procedure properly outlined in the following paragraphs F2 6 Positive Crankcase Ventilator Valve F2 8 Replacement of Vacuum Motor Every 12 000 miles 19 200 km replace the posi a Drill center of two spot welds using a 6 inch tive crankcase ventilator valve Also remove the 1 59 mm drill Do not center punch PCV filter from inside the air cleaner Wash filter b Enlarge two holes using a 2 lnoh 3 96 mnm in suitable solvent and dry by blowing lightly drlll with an air hose Oil with engine oil shake out excess oil Reinstall the filter After installing new Ca l Use extreme Care not to damage the wr valve always readjust engine idle cleaner Snorkel C Remove V3Cl 1Ll1 1 l l l 10lZO1 I lZ3lI1 I Stfap SCG F2 7 Replacement Procedures F2 6 Should the test performed in paragraph F2 4 d Lift vacuum motor cocking it to one side to indicate necessary replacement of the heated air unhook motor linkage at the control door 154