my cars been using oil like its going out of fashion,drives fine,pulls hard,no misfires,no nasty noises,idles fine,revs without hesitation.

 

its spat the dipstick out a couple of times at high revs (6-7k) and spat oil allover the battery and turbo etc

 

no smoke at all on tickover no matter how long its left, blip the throttle and there will be a puff of black smoke followed by a puff of blue smoke.

 

drive the car normally and theres no smoke at all, open it up and you can notice a blue haze in the mirror,not loads but if you keep an eye on the mirror you can see it, coming down through the gears to a stop say off a sliproad sometimes when I stop a puff of smoke will pass me.

 

what I'm wondering is would a jammed open pcv valve cause this (please be this!) or does it sound like something more sinister like a cracked piston? its been happening for a while now so if it was a cracked piston wouldn't it have gone completely by now?

Sounds like bad news....... :cry:

 

The dipstick blowing out indicates a build up of pressure in the crank case, like blocked PCVs would cause. However I doubt that faulty PCVs would seriously increase oil consumption.

 

I'd guess piston rings/cylinder bore wear.....

 

I hope I'm wrong mate.

 

Richard

yea av been told it sounds like a cracked piston but theres only 53k on the clocks so i was hoping it would just be something simple and I was thinking about how a pcv valve works and what it does a think it got me hopes up a bit lol

Forget the PCV valves, think about the more serious one, piston damage. Do a compression test, that should tell a story for you.

Cracked ring lands more then likely which don't always show up on a compression test

Cracked ring lands more then likely which don't always show up on a compression test

 

If you do a dry test and then a wet one it should show up a difference in the pressure.

stuff it I have me eye on smithy's rebuild kit anyway :D