Check the play of the release bearing by spinning it by hand. If there is excessive play or noise, replace the release bearing.

NOTE: The release bearing is packed with grease. Do not wash it in solvent.
PCV Valve Inspection
Remove the harness holder (A).
Check the PCV valve (A), the hoses (B), the pipe (C), and the connections
for leaks or restrictions.
At idle, make sure there is ...
Replacement (Part -1)
Remove some of the brake fluid from the master cylinder.
Raise and support the vehicle.
Remove the front wheels.
Remove the brake hose mounting bolt (A).
...
AM/FM Radio Reception
Radio Frequencies
The radio can receive the complete AM and FM bands.
Those bands cover these frequencies:
AM band: 530 to 1,710 kHz
FM band: 87.7 to 107.9 MHz
Radio stations on the AM band are a ...