Having problems with your 1996 BMW 318 ?

How do you tell if crankcase vent valve is bad?

\015 I remove the breather cap off of my valve cover and it is blowing alot of air. It starts running rough! Put it back and it starts running somewhat smooth again. It did this before i had the head rebuilt and is still doing it!!! its a 1.9 4cyl.\015 Posted / edited by AnonymousUser on : 10-12-2018

Answers :

Well it supose to blow air because your motor is moving at probley 6 or 7 hundred rmps but the resone it runs rough is because your losing compression when you open the cap but i would check your pvc valves and maybe have it pressure tested.
I have an bmw 316i ,it are very heavy on feul can the ccv (crank vent valve play a big role in feul consumption
Repair Help & Product Troubleshooting for 1996 BMW 318

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