Quote:
Originally Posted by 911monty
The oil fill pipe can collapse/ crack from the excessive vacuum in the crankcase when the AOS fails as yours appears to have done.
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Surely if the oil filler pipe is cracked, then the engine wouldn't sound much different if I ran it with it removed? It stalls when I remove it, showing there's a huge difference when it's in place.
Would a faulty AOS cause a vacuum leak?