Here we go again........

The following morning after a thrash when i start her up there is a big cloud of blue smoke that disappears after a few seconds but doesn't return during driving or on boost or idle. It is only there when you first start her up..........?

Piston rings, valve deals or turbo?

Suggestions please

 

Does it do it every morning now, regardless how its driven the day before or was this a one off?

 

Deffo worse if it has been thrashed but still every time I notice it it is doing it

 

Hi i had this and it was the turbo seals only happened on start up.

 

How much to sort?

 

I get this some times after my car goes on track, but it's down to me needing a oil catch tank, as my car is tuned, is yours a standard car?

Take it easy for a while and see if it disappears

It may well be abit of oil sneaking down the IC then in the zort

Darc

 

Far from standard! But nothing obscene, 330 from a uk turbo 2000 and vf 28 and supporting mods?

 

You might well need a catch tank also would help to stop the oil coming in your intercooler

Darc

 

How the hell does oil get into the IC?

 

Whilst on boost you get blowby gasses which pass the piston rings and enter the crank case this can stir up oil vapour, this blowby gas/oil vapour mix then gets dumped out of the crank case breather into your turbo intake pipe, as the oil vapour passes through the turbo,intercooler and intake manifold the oil seperates from the air/gas mix and sticks to everything, the oil can build up in the intercooler and intake manifold after hard driving, it then settles in the heads and or cylinders so that the next time you start the car you get a chuff of blue smoke. Mine did it all the time after hard driving until I fitted a catch can. The oil deposited from the crank case in the intake can clog up the idle air control valve, reduce intercooler efficiency, cause boosting issues by clogging up the solenoid and MAP sensor and reduces the flame front of your fuel.

Cheers Iain

 

I think I need you to look at my car that is a comprehensive explanation Iain, thanks. Any idea how I can confirm whether it is the problem you describe or the turbo seal one?

 

Two ways, drive your car off boost for a few days (hard I know) or fit a catch can and watch to see if the blue smoke goes away, on your dipstick where does the oil level indicate?

Anytime you want me to look at the car just say fella.

Cheers Iain

 

Oil is at the top mark when warm, a few mm down when cold

 

I have found that if you fill the oil level no higher than the back of the 'F' (not all the way to the dot) the amount of blowby oil is greatly reduced but a catch can will sort it right out.

Cheers Iain

 

Where does it fit in the engine bay mate?

 

Anywhere there is space mate, I can advise when I see the car.

Cheers Iain

 

Will this do the job? Or do you need to buy a decent spec?

http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT

 

Just the job

Cheers Iain

 

Quite common on modded scoobs without catch cans to have alittle smoke on start up,or if the motor is forged then it is very common as the clearences are alittle bigger,all depends how much you've got really.

 

Is there enough inlets on that one? I'm not sure if it's two or three you Need on a Scoob

Darc

 

if it has 2 then just t-piece the rocker breather ones onto the one outlet and the crank case one on the other mate

 

You need one port to be to atmosphere, if you plumb the 2 cam cover breathers into 1 and the crank to the other then there is nowhere for the blowby to go and I have seen an Impreza throw oil out of the exhaust (I guess either past the pistons and/or out through the breather due to pressure buildup in the crank case).

The worst source of oil is from the crank case so putting that to the catch can on its own will help a great deal, you can easily add ports to the catch can if needed. But one of the ports must be to atmosphere or back to the intake.

Cheers Iain

 

or just drill a hole in the top of the catch can as i have Ian

 

This fitting guide will help you out fella

clicky

 

Have you put a pipe from this hole to a filter outside of the engine bay?

The only reason I ask is that the fumes can be quite overpowering and the line to atmosphere should be filtered.

Cheers Iain