SPECIFICATIONS
Torque Specifications
DESCRIPTION AND OPERATION
Brake Booster
The power brake actuation system includes a vacuum sorce (engine manifold or vacuum pump), vacuum assisted brake booster, vacuum check valve and a vacuum supply tube. Vehicles equipped with 3.5L and 3.7L engines utilize engine manifold vacuum and vehicles equipped with 2.0L GTDI engines utilize an engine-mounted/cam-driven vacuum pump and engine manifold vacuum to supply vacuum.
Vacuum is delivered through the vacuum supply tube to the vacuum check valve. The vacuum check valve is a one-way valve that allows supplied vacuum to the booster then closes when the vacuum supply is removed. The vacuum is applied to a rubber diaphragm on the vacuum side of the brake booster chamber which then pulls the piston rod in when the brakes are applied to provide power assist, reducing the amount of effort required at the brake pedal to actuate the foundation brakes.
REMOVAL AND INSTALLATION
Brake Booster
Removal
WARNING: Before beginning any service procedure in this section, refer to Safety Warnings in Section 100-00. Failure to follow this instruction may result in serious personal injury.
NOTE: Removal steps in this procedure may contain installation details.
All vehicles
-
- To install, tighten to 63 Nm (46 lb-ft).
Vehicles equipped with 3.5 L Ti-VCT, 3.7L Ti-VCT or 2.0L Gasoline Turbocharged Direct Injection (GTDI) engines
- Remove the Air Cleaner (ACL) outlet pipe. Refer to Section 303-12.
- Remove the Hydraulic Control Unit (HCU). Refer to Section 206-09.
Vehicles equipped with 3.5L GTDI engine
-
- To install, tighten the nut to 6 Nm (53 lb-in).
- To install, tighten the clamps to 5 Nm (44 lb-in)
- Disconnect the ABS module electrical connector.
All vehicles
- Remove the brake master cylinder. Refer to Section 206-06.
- NOTICE: Do not service the brake pedal or brake booster
without first removing the stoplamp switch. This switch must be removed with
the brake pedal in the at-rest position. The switch plunger must be
compressed for the switch to rotate in the bracket. Attempting to remove the
switch when the plunger is extended (during pedal apply) will result in
damage to the switch.
Remove the stoplamp switch. Refer to Section 417-01.
- NOTE: The booster push rod clevis-locking pin is a one-time use only part. Any time the booster push rod clevis-locking pin is removed, a new booster push rod clevis-locking pin should be used. Remove the clevis-locking pin by squeezing the locking tabs and pulling outward on the opposite end.
-
- To install, tighten the new nuts to 25 Nm (18 lb-ft).
Installation
- To install, reverse the removal procedure.
Brake Vacuum Pump
Removal and Installation
NOTE: Removal steps in this procedure may contain installation details.
- Remove the air cleaner outlet pipe. For additional information, refer to Intake Air System Components-Exploded View in Section 303-12.
- To install, tighten to 10 Nm (89 lb-in).
- Inspect and, if necessary, install a new brake vacuum pump gasket.
- To install, reverse the removal procedure.
Brake Booster Vacuum Sensor
Removal
WARNING: Before beginning any service procedure in this section, refer to Safety Warnings in Section 100-00. Failure to follow this instruction may result in serious personal injury.
- Disconnect the brake booster vacuum sensor electrical connector.
- Remove the brake booster vacuum sensor.
Installation
- NOTE: Please note the correct installation position in the
exploded view. It is critical that the sensor be installed in the exact
position that it was removed.
To install, reverse the removal procedure.
Hydraulic Brake Actuation
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Disassembly and Assembly of Subassemblies
Cylinder Head
Special Tool(s)
Material
Disassembly
NOTICE: During engine repair procedures, cleanliness is extremely
important. Any foreign material, including any material created while cleaning
gasket surfaces, that enters the oil passages, coolant passages or the oil pan
can cause en ...
Intake Air Distribution and Filtering
SPECIFICATIONS
Material
Torque Specifications
DESCRIPTION AND OPERATION
Intake Air Distribution and Filtering
2.0L GTDI
The air intake system consists of the:
ACL assembly.
ACL element.
ACL outlet pipe.
CAC.
CAC tubes.
The air intake system:
cleans inta ...
Installation
Engine
Special Tool(s)
Material
Lubricate the torque converter pilot hub with Multi-Purpose Grease.
Remove the Torque Converter Retainer and bolt.
NOTE: Align the torque converter stud marked during removal with
the flexplate.Using the Floor Crane and Spreader Bar, assemble t ...