answersLogoWhite
Auto Parts and Repairs
Fuel and Engines

What is an engine breather and what is its purpose?


Top Answer
User Avatar
Wiki User
2012-03-27 13:17:46
2012-03-27 13:17:46

It is a filtered opening in one of the valve covers and allows the PCV to draw filtered air through the crankcase.

Engine Breather Systems

Inside an engine internal pressure is produced within the crankcase. This pressure is generally caused by a small leakage of combustion gasses past the piston rings, this is known as blow-by. If this pressure is not released, the subsequent build up can cause gaskets and seals to fail, creating engine oil leaks.


Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.