G37x Coupe AWD V6-3.7L (VQ37VHR) (2009)
Vacuum Brake Booster: Testing and Inspection
Inspection And Adjustment
BRAKE BOOSTER
Inspection and Adjustment
INSPECTION BEFORE REMOVAL
Air Tight
CAUTION:
Check the air tight condition when the master cylinder and the brake booster is installed.
1. With a handy vacuum pump, apply vacuum pressure of -66.7 kPa (-500 mmHg, -19.70 inHg) to the brake booster.
2. If the air tight condition cannot be maintained, perform the following operation.
a. Check O-ring on the master cylinder. If anything is found, replace the O-ring.
b. Check the air tight condition again. If the condition still cannot be maintained, replace the brake booster.
INSPECTION AFTER REMOVAL
Input Rod Length Inspection
1. Loosen the lock nut (1) and adjust the input rod (2) to the specified length (A).
Standard
A : Refer to BR-78, "Brake Booster". See: Specifications
2. Tighten the lock nut to the specified torque.
INSPECTION AFTER INSTALLATION
Operation
Depress the brake pedal several times at 5-second intervals with the engine stopped. Start the engine with the brake pedal fully depressed. Check that
the clearance between brake pedal and dash lower pane decreases.
NOTE:
A slight impact with a small click may be felt on the pedal when the brake pedal is fully depressed. This is a normal phenomenon due to the brake
system operation.
Air Tight