INSTALL AIR SWITCHING VALVE
Install the air switching valve with 2 new nuts.
Connect the air switching valve connector.
INSTALL NO. 4 INTAKE PIPE
Install 2 new gaskets and the No. 4 intake pipe with 4 new nuts and tighten the nuts in the order shown in the illustration. Then, tighten the nuts labeled 1 and 3 to the torque specification again.
Check that the nuts are tightened to the torque specification.
INSTALL EXHAUST MANIFOLD HEAT INSULATOR
Install the exhaust manifold heat insulator with the 5 bolts.
CONNECT NO. 4 AIR INJECTION SYSTEM HOSE
Connect the No. 4 air injection system hose to the air switching valve.
Secure the hose with the clamp.
INSTALL AIR CLEANER ASSEMBLY
Connect the air cleaner hose.
Install the air cleaner with the 2 bolts.
Tighten the hose clamp.
Attach the wire harness clamp.
Connect the mass air flow meter connector.