Re: Rocker cover air pressure
Breather pipes can block up. I'm not conversant with this engine or its
idiosyncrasies, so I don't know where it leads the crankcase pressure, but I
do suggest you check the breather system for blockages.
"Smudge" <email@example.com> wrote in message
> Perhaps someone can give the benefit of their technical knowledge, I
> have recently discovered air being pushed out of the gasket under the
> rocker cover on my 110 2.5D. I have ordered a new gasket to replace the
> old grotty one, but a number of people I have mentioned this to have
> expressed surprise that I have air pressure inside the rocker cover at
> all. I have tried removing the breather tube from the oil filer cap,
> and sure enough there is air being pumped out of the filler cap as the
> engine idles. This seems strange given that there is a filter inside
> the cap which would indicate to me that air is supposed to flow into
> the rocker cover not out. Frightening phrases such as 'crank case over
> pressure' and 'piston replacement' have also been mentioned, so my
> questions are:
> Should air be blown out of the rocker cover or sucked in?
> If it should be sucked in why is mine being blown out and how do I fix
> In trepidation...