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