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Power Brake Booster Vacuum Check Valve and Hose Replacement (LF1)

Power Brake Booster Vacuum Check Valve and Hose Replacement (LF1)

Removal Procedure


1. With the engine OFF, apply and release the brake pedal several times until the brake pedal becomes firm to deplete the power vacuum brake booster vacuum reserve.

2. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .

3.
Note

Lift the dash panel insulator slightly to remove the upper master cylinder heat shield nut.


If equipped with the master cylinder heat shield, remove the master cylinder heat shield nuts (1).


4. Remove the master cylinder heat shield bolt (1).


5. Remove the master cylinder heat shield.

6. Disconnect the power vacuum brake booster vacuum sensor electrical connector.


7. Remove the vacuum sensor (1) and power brake booster vacuum hose assembly from the power vacuum brake booster.

8. Release the spring clamp (1) and remove the power brake booster vacuum hose from the intake manifold vacuum port.


9. Release the power brake booster vacuum hose from the routing clip (2) on the power brake booster auxiliary pump.

10. Disconnect the power brake booster vacuum hose quick connect (3).

11. Remove the power brake booster vacuum hose and check valve assembly.


Installation Procedure


1. Install the power brake booster vacuum hose and check valve assembly.


2.
Note

A small amount of denatured alcohol may be used to ease assembly. Do not use soap.


Position the power brake booster vacuum hose to the intake manifold vacuum port and install the spring clamp (1).

3. Install the power brake booster vacuum hose to the routing clip (2) on the power brake booster auxiliary pump.

4. Connect the power brake booster vacuum hose quick connect (3).

5.
Note

A small amount of denatured alcohol may be used to ease assembly. Do not use soap.


Install the vacuum sensor (1) and power brake booster vacuum hose assembly to the power vacuum brake booster.


6. Connect the power brake booster vacuum sensor electrical connector.

7. Install the master cylinder heat shield, if equipped.


8. Refer to Fastener Caution .

Install the master cylinder heat shield bolt (1) and tighten to 10 Nm (89 lb in) .

9.
Note

Lift the dash panel insulator slightly to remove the upper master cylinder heat shield nut.


Install the master cylinder heat shield nuts (1) and tighten to 25 Nm (18 lb ft) .


10. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .