I'm in the process of doing some final tuning on my 340. While fiddling with the timing yesterday I noticed a hissing sound after I shut the car off. It's coming from the oil fill cap. The 340 has a PCV on the pass. rear side. Should there be a breather on the opposite side? Should I be concerned about this hissing?



Last edited by mopowers; 10/03/13 01:03 PM.