Intake Manifold Cleaning and Inspection (LF1, LFW or LFX)
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Intake Manifold Cleaning and Inspection (LF1, LFW or LFX)
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Intake Manifold Cleaning Procedure
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1.
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Remove any remaining gasket and/or gasket material from the following:
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2.
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Clean the following intake manifold areas in solvent.
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Intake manifold gasket sealing areas
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Intake manifold passages
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Brake booster hose passage
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Evaporative emission (EVAP) solenoid passage
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Positive crankcase ventilation (PCV) vacuum hose passages
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1.
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Inspect the intake manifold for the following conditions:
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Damage to the throttle body bolt holes (1)
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Damage, debris or restrictions to the PCV system hose ports (3)
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Damage to the gasket sealing surface for the throttle body (2)
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2.
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Inspect the intake manifold for the following conditions:
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Damage, debris or restrictions to the brake vacuum booster hose port (3)
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Damage to the intake manifold bolt bosses (1)
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Damage to the EVAP purge solenoid mounting boss (5)
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Damage, debris or restrictions to the EVAP purge solenoid port (4)
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Gouges or damage to the intake manifold sealing surfaces (2)
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3.
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Inspect the intake manifold sealing surface (1) for warpage.
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3.1.
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Locate a straight edge across the intake manifold sealing surface.
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3.2.
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Insert a feeler gauge between the intake manifold and the straight edge. An intake manifold with warpage in excess of 0.50 mm (0.020 in) must be replaced.
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4.
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Repair or replace the intake manifold as necessary.
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