Oil in your boost pipes

WooHaa · Post by **WooHaa** » Mon Oct 02, 2006 8:00 am

Valve Stem Seals.

You said that smokes pours out of the car when started & then dissappears. This can be valve stems seals. When the car is switched off the oil leaks through the seal into the combustion chamber. When you start the car, the oil gets burned which is the smoke & dissapears as all the oil is burnt off.

I also was speaking to a guy from porsche & he mentioned that you get a puff of smoke everytime you start a porsche as porsche has designed a turbo that leaks oil out of the oil seal in the turbo when switched off. The reason is for protection when the engine is started again that their is oil on the bearings already even before the oil pump can get to it. doesn't make sense to me, but that is what he said.

Draco · Post by **Draco** » Mon Oct 02, 2006 8:11 am

It seems all went well, woohaa, remember, if your valve stem seals are gaar you can see that by driving the car to say third or forth or any other gear for the matter of fact, then just take your foot off the gas, it will smoke like mad because your car vacuums sum serios shit whitch brings the oil and walla you will see it.

My car doesn't do that, some may say it's just starting with the seals but then again I've had this problem since about february after I got me turbo back, took it back, then it's fine for some time then starts again, take car back, redo turbo, ok again for a while, get it back fine for a while...back again... this was the 5th time and you won't believe it, I'TS GONE AGAIN!!!!!! hold thumbs it doesn't come back again.

Draco · Post by **Draco** » Tue Oct 10, 2006 9:06 am

As sure as murphy is a F#$#@r such is the truth, the smoke and oil were back over the weekend when I went to witbank, there I spoke to some people and basically decided that I would change the engine, then I started checking everything again and I found that the pipe from the tappet cover to the air intake between airfilter and turbo are wet with oil, couldn't understand why because I had it in a small coke bottel with little holes to see if it catches any oil, it only caught about 2 or 3 ml.

Later I checked and I found a sort of a restriction valve or washer inside the pipe witch I removed, drove all the way back from middelburg to PTA and nothing, no oil no smoke, no kak. I am very sceptical, can't believe that was the problem but so far the proof is in the puding, a bloody restriction valve/washer in a pipe, can you believe it

ChemCool · Post by **ChemCool** » Tue Oct 10, 2006 9:52 am

And ofcourse I want to know why did the Japanese put that restriction in there? What can happen now, now that it is removed?? I replaced all those pipes with silicon jobbies, and without knowing it, got rid of that restriction washer anyway.

Draco · Post by **Draco** » Tue Oct 10, 2006 9:58 am

Are you going to do some research on the net?

ChemCool · Post by **ChemCool** » Tue Oct 10, 2006 10:05 am

Difficult to say Derek. With all other research and reading, nothing was touching this situation at all. But let us see, if time allows, why not. Can use Google perhaps.

Daniel · Post by **Daniel** » Tue Oct 10, 2006 11:42 am

is that valve there as standard? I know people add a 1way valve when they put a bigger exaust on to stop it smoking due the the pressure drop in the exhaust wich pulls oil out of the seals

WooHaa · Post by **WooHaa** » Tue Oct 10, 2006 11:48 am

That is the PCV or pvc valve.
what normally happens is that it slides out of position & blocks the pipe.

Shouldn't be a problem if it is not there, but you should start getting a little more oil in the pipes.

that was the valve I made mention the first time this thread started.

Toby · Post by **Toby** » Tue Oct 10, 2006 12:16 pm

It's the PCV valve - positive crankcase ventilation valve. From a website:

The Positive Crankcase Ventilation valve is an emissions control device that routes unburned crankcase blowby gases back into the intake manifold where they can be reburned. The PCV system is one of the oldest emission control devices, and also one of the most beneficial. Besides totally eliminating crankcase emissions as a source of air pollution, the constant recirculation of air through the crankcase helps remove moisture which otherwise would cause sludge to form. Thus the PCV valve extends the life of the oil and engine. The PCV valve requires little maintenance. The valve and filter should be replaced somewhere around 30,000 to 50,000 miles (see the vehicle owners manual for service intervals).

The positive type of system utilizes manifold vacuum to draw the fumes out of the crankcase. The amount of vacuum is controlled by a positive crankcase ventilation (PCV) valve. This valve, when inoperative, will lead to either oil consumed through the intake system when stuck in the open position or when stuck in the closed position will lead to oil blowing back out the filter cap and out past the engine seals.

Most positive systems recommend cleaning every 6,000 miles and valve replacement every 12,000 miles. The standard type usually recommend cleaning when oil is changed. In either case, the breathing system should be completely gone through when major piston ring work is being performed. The success of a piston ring job today is very much dependent upon the engine being able to breathe properly.

Draco · Post by **Draco** » Tue Oct 10, 2006 12:17 pm

It is a thick copperish valve/washer in the pipe itself, inside the pipe it seems like it is a onway valve or something but when it's out it looks like a thick washer with a small hole in, no valves or watever just plain round, thick with a smallish hole in the middle.

Whel woohaa logically it would give through more oil, hense my problem will become worse, the oppisite is happening, it seems to be gone....

Toby, this one is in the pipe itself, no springs nothing, the pipe on the right hand tappet cover to the turbo air intake

ChemCool · Post by **ChemCool** » Tue Oct 10, 2006 12:42 pm

[img][img]http://i112.photobucket.com/albums/n187 ... 9A0020.jpg[/img][/img]

ChemCool · Post by **ChemCool** » Tue Oct 10, 2006 12:44 pm

[img][img]http://i112.photobucket.com/albums/n187 ... 9A0021.jpg[/img][/img]

ChemCool · Post by **ChemCool** » Tue Oct 10, 2006 12:47 pm

The first pic shows the washer / hole about 2cm from the opening of the pipe. Second pic the easher shows the thickness on right hand side op pipe-about 2cm inwards rifht to left. See the bulg or bulk side of the pipe.

Draco · Post by **Draco** » Wed Oct 11, 2006 11:07 am

I spoke to some macks, on specialising in nissan and another a friend that knows these engines a bit, according to them it makes sence now, the engine couldn't breathe proparly hense pushing out the compressed air together with oil ect. out where it could.

For some reason I am still a bit baffeled, all the sx's iv'e seen the two black rubber pipes on the oppisite sides on the tappet covers are connected with another black rubber pipe, mine does not have this connection pipe, I worried about this and and asked them this question...
must I put this pipe in to be safe, both said it is not neccasary.

Next time someone askes what these pipes are there for, it's not there for sxual karma, sxuality, sxual poopoligy,sxual frontoligy,sxual nudity, sxdrive, sxual activity, sxual pumping equipment or anything else, it's there for BREATHING... and I thought I knew everything

There you have it, my engin could not breathe properly, poor thing, it was starved for breath for such a long time, no wonder it didn't have hooper in it's pooper, now I can breathe, the engine can breathe and theres hooper in her pooper giving me more mocka for my chocka, no more hicky in her sticky or wacky in her cracky