I've just bought a FRST and when under boost the oil filler cap comes off, also so does one of the breather pipes,
Would anyone have a analysis? thanks

 

Have you tried cleaning out the breathers they may be blocked and when was the last time it had a good oil change its a pressure build up in the engine

 

oil was changed 3k ago. one of my friends suggested to clean it out so it was a good excuse to order bailey one.
somone also said could be piston rings what u think?

 

Its definetely a build up in pressure it could be that some of the oilways are blocked inside the engine not just the pipes a breather tank is one way of releasing a build up of pressure. It will damage the piston rings eventually if not sorted and it will also try to release this pressure through the engine seals and dipstick.

 

my enigne done this an it was due to piston rings being fcuked but u could be lucky an it just be blocked breather pipe...

jon

 

Just to be on the safe side perform a compression check on each cylinder

 

Hi there i had this problem with my Fiesta xr2i i got an airline and blew out all of the breather pipes and a huge sausage of crap came out of them all this seemed to cure the problem for a little while until my piston rings went. hopefully for your sake it is only the breather pipes.

 

Your best bet would be to stick an engine flush through it and hope that it clears the oilways when you change your oil next. I had the same problem on my XR2 and found the breathers were blocked but i stripped the engine down anyway and repalced the piston rings

 

Always best to clean out the pipes but dont forget to clean out the breather tube with a screw driver too as i replaced an engine coz of this only to find out once it was out the the pipe the hose fits on to was caked
what a knacker!!!!!!!!!!!!!!!!!!!!!

 

Don't worry mate had and sorted same problem last week it was the breather system, used to blow cap off and bellow loads of smoke out of the back end i thought straight away piston ring did a comp test ok put a bailey on it jobs sorted

 

Just dont drive it because i'll give you a hint... my old engine is sitting in my back garden

Because i fry'd the rings! that breather thingy on the left of the inlet man kept blowing apart & the motor was smoking like fcuk! so in the end i got pissed off with it & kept booting it till the rings actaully went! well they where fcuked anyway so

That was my old merc grey one 3 years ago & i still got the orignal engine LOL

 

just put bailey one on and it's sorted the problem out.

cheers guys