Pcv service

Q: What is engine noise in s40 five cylinder? on 2004 Volvo in Somerdale, NJ on June 26, 2017 Engine noise sounds like alternator bearings were bad. Changed alternator but noise still there. Noise stops when you remove the oil filler cap. Noise starts again when you tighten oil filler cap. Popular Answer pushrod , June 26, 2017 Engine can not breath! .. Have crankcase *breather system* checked by qualified personnel. ▪️https://repairpal.com/repair-shops▪️