
How To Replace The PCV On A B8 Audi S4 (Audi A7, S5, & SQ5)
Audi neatly packaged a lot of important components on the S4's engine beneath the supercharger. While they created a good looking engine, the packaging makes service work tricky. One of the components located under the supercharger is the PCV/air oil separator. The PCV/AOS will affect a vast...