black&white check valve on driver side top of engine

[topnotch]

which way should the white side be facing the white side towards firewall or white side towards the front of car

 

[TurboBuRick]

If you look close it should say right on it. Black side goes to vacuum.

RL

 

[topnotch]

which side is the vacum side

 

[TurboBuRick]

which side is the vacum side

Toward the motor.