Quest V6-3.5L (VQ35DE) (2009)
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WARNING:
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To avoid the danger of being scalded, never drain the coolant when the engine is hot.
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The gasket for intake manifold collector (upper) is secured together with intake manifold collector (lower) bolt. Thus, when replacing
only the upper gasket the lower gasket must also be replaced.
1. Remove the cowl top and cowl top extension. Refer to See: Body and Frame/Cowl/Cowl Moulding / Trim/Service and Repair.
2. Remove the engine cover using power tool.
3. Remove air cleaner case, (upper) mass air flow sensor, and air cleaner to electric throttle control actuator tube as an assembly. Refer to See:
Tune-up and Engine Performance Checks/Air Cleaner Housing/Service and Repair.
4. Partially drain the coolant when the engine is cool. Refer to See: Cooling System/Coolant/Service and Repair.
5. Disconnect the following:
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Power brake booster vacuum hose
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Coolant hoses from the intake manifold collector (upper)
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Vacuum lines from the intake manifold collector (lower) and power valve
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Fuel injector electrical connectors
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PCV hose
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Electric throttle control actuator electrical connectors
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EVAP canister purge volume control solenoid valve hose
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EGR temperature sensor electrical connector
CAUTION:
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Cover any engine openings to avoid the entry of any foreign material.
6. Remove the EGR tube [to intake manifold collector, (lower)] nuts.
7. Disconnect the power steering hose bracket from the back of the intake manifold collector (upper).
8. Remove the EVAP canister purge volume control solenoid valve bracket bolt. Position the valve aside.
9. Remove the VIAS control solenoid valve bracket bolt. Position the valve aside.
10. Remove the vacuum tank.
11. Remove the intake manifold collector (upper) support bracket from the back of the intake manifold collector (upper) using power tool.
12. Loosen the intake manifold collector (lower) bolts in the order as shown using power tool, and remove the intake manifold collector (upper and
lower) and gasket.
