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Valve rubbers are small seals in the head that prevent oil from entering the cylinders - and if they are not correct, then the car will consume a lot of oil and smoke. Link to the article ???????? https://www.my-autosos.com/kako-radi-... #polovniautomobili #rabljenavozila #automotive #carservice This video covers the following questions and topics: 00:00:01 Introduction 00:00: 37 Symptoms of Valve Rubber 00:00:42 Blue smoke from the exhaust 00:01:07 Oily spark plugs 00:01:35 Rough idling 00:01:53 Decrease in engine power 00:02:21 High oil consumption 00:03:15 Failure on the eco test 00:03:40 Valve rubbers function 00:04:56 How to identify defective valve rubbers 00:07:01 Replacement cost rubber valve