Originally Posted by gregorz4
Has anyone noticed the noise that ocurs when the a/c is turned on? Every 30-40 seconds the A/C makes a loud hissing/knock noise? Is this normal for most Impreza owners?
It should be the A/C Compressor. it Happens. Just check though. Look at your engine, and look at the Belts, there will be a fly wheel type device that compresses air, and will go on every few seconds.