got a bit of a strange fault...

 

i've noticed it before but its never done it more then once every few months, thought nothing more of it tbh, but sitting at a set of lights id get a cloud of blue smoke, then it would go and not return for a few months....?

 

 

but in the last few days have noticed it more often,

cold start, no smoke

allowed to stand till heated up, then smoke then clears

on boost or driving, no smoke,

under vacumme driving, no smoke,

hot start,no smoke at first then smoke then clears

 

 

there is no oil in the intake pipes, car runs and drives like there's nothing wrong

 

it not all the time, today started fine no smoke, then started to smoke as it heats up, then none at all, then after getting fuel at the first set of lights after the petrol station, smoke, then a mile later at home nothing....

 

 

im guess its got to be breather related, any one got any ideas tips? is there a one-way valve trick like on the s13's?

Probably worth replacing the PCV valves & hoses as the first step bud - the valves can wear & not seal or get gummed up and the hoses are usually brittle & break when you try to take them off. There are 5 hoses in all but 1 is a bit of a git - usually most people replace the 2 from the valves on the rear of the plenum & the 2 at the front of the plenum :)

i'd forgotten about them, thanks, i keep meaning to replace all the breather pipework anyway, guess it gives me an excuses....

mine does the same ... took off the pipes and pcv valves today but they where not stuck so no luck :(

dam, i've got a spare pair of known good valves im going to try on mine tommorow,

 

but if its not breather related i have no clue what it could be?

 

its defo blue smoke, and its out of both exhausts, as my zeds exhausts aren't linked (one pipe per bank) and both intakes are clean,

 

if it were a turbo surely there would be oil in the intercooler, or intake pipes,

 

and the chances of 2 valves or cylinder rings going at the same time is very remote, the oils got to be getting into the plenum somehow....

thought smoke at idle was to do with turbo oil seals on the way out

i blew 2 sets of seals on my old s13, both times the intake had oil in it, and car car didn't feel right. and when ever you let off the throttle after boost it would smoke like a chimney, was obvious going down hills, also noticed a slight spike in oil pressure when on boost,

 

i've had nothing like that from the zed, everything is normal,

 

and like i said i have 2 separate exhausts the chances of both going at the same time is so remote.

 

from what i saw the the s13's turbos when the seals go, they either leak into the exhaust directly, leak oil into the intake, or leak oil onto the floor, please correct me if im wrong, but the s13's turbos are just slightly bigger Garrett T2's

P.S if my turbos are gone im going to cry... only just got it back from the body shop... spent a fortune already lol:headvswal

took it apart today to fit the good pcv's

 

once i finally made enough room to remove the breather hoses, the valves appeared to be working correctly and weren't gunked up, at this moment i thought :headvswal:shock::headvswal new turbo time, but as id spent ages getting to them id change them anyway, on removing the passenger side pcv i noticed that the valve has no spring in it!!

 

fitted the new ones and no more smoke, and my vacumme seems slightly more stable too :thumbup:

 

from the sound of it the spring is broken inside the valve, all thought i've just had a horrible feeling, this plenum and valves came off my old zed, which died of a similar fault.... could this valve have done it... :sad:

 

rolandas it might be worth checking yours again, as it wasn't till i removed them it became apparent....

took it apart today to fit the good pcv's

 

once i finally made enough room to remove the breather hoses, the valves appeared to be working correctly and weren't gunked up, at this moment i thought :headvswal:shock::headvswal new turbo time, but as id spent ages getting to them id change them anyway, on removing the passenger side pcv i noticed that the valve has no spring in it!!

 

fitted the new ones and no more smoke, and my vacumme seems slightly more stable too :thumbup:

 

from the sound of it the spring is broken inside the valve, all thought i've just had a horrible feeling, this plenum and valves came off my old zed, which died of a similar fault.... could this valve have done it... :sad:

 

rolandas it might be worth checking yours again, as it wasn't till i removed them it became apparent....

 

they tend to wear & not seal internally - even though they look ok. Mine done exactly the same years ago & visually looked fine.

 

For the cost of them it is always worth just chucking them in as a first step job!

they tend to wear & not seal internally - even though they look ok. Mine done exactly the same years ago & visually looked fine.

 

For the cost of them it is always worth just chucking them in as a first step job!

 

Yup - seconded. It's a common issue on the VG30dett and far easier/cheaper to start with before you get to the turbo seals.....