Turbo problems.

[Funbus]

I've recently got a re conned kkk turbo. This is part of a overhaul when the full aaz engine was rebuilt. Turbo feed cleaned and proven. Brand new turbo return to sump hose with the brickwerks adapter. Breather from rocker doesn't go to intake. It has its own filter attached. I know the oil level is ok as I've got half a litre left from a 5 litre bottle after the rebuild.

I've ran it up the last couple of days and noticed oil coming from the exhaust to turbo connection.

Took turbo off. There's no oil whatsoever in the exhaust manifold and a light film on inlet manifold.

I'm thinking the turbo seal is gone causing the leak.

Any advice appreciated before I ring the company who supplied the turbo.

Cheers all

[HarryMann]

On exh manifild or in it?
Is it dripping down from cam cover at rear (gbox end)?
what's coming out of exhaust.. blue smoke grey smoke white or black when you boot it.
A big drip off turbo centre brg assy or minor.
Etc.
Windage tray /sump gasket or simple gasket.

[Funbus]

In the exhaust and turbo outlet. Runny fresh oil. Not being burnt off so no smoke. I think its the turbo seals. The company I got it off think crank case breather may be blocked. I've assured them it isn't and they're picking turbo up tomorrow and checking it. The only thing I never replaced on the rebuild was the 'hockey puk' UFO thing, because I couldn't source one.

Cheers

[HarryMann]

Hockey puck Ufo. More specific please. ..
Is thereuch play in the turbo shaft? A small rock 0.020" to 0.040" (40 thou) permissible

[Funbus]

The breather on top of the rocker cover. Turbo has gone back to shop now to get sorted. It should have been perfect as it was totally refurbished. Cheers

[Funbus]

I've got turbo back and refitted it. Whilst it was away I got a larger bore hose for the oil return.

It's still leaking abit of oil through the seals, although not as much.

Breather is clear and engines running ok. I haven't had an oil pressure gauge on it yet.

I'm not running an oil cooler. Is it possible that when the engine is under load the oil is getting too hot, and thinner, then passing the seals. Viscosity rather than pressure?

Cheers

[VirginAtlantic]

I've got the same issue - New oil running out of the exhaust gas end of the JX KKK K14 turbo. The turbo is on an AHU 1.9TDI engine.

I'm contemplating what to do. There is no movement on the spline if this makes a difference? breather is clear, oil is in the sump (10-40 oil) .

Is this a common and acceptable leak ?





what would you do?

[MGP]

Is the turbo indexed correctly? As in the drain at 6 o'clock hard to see from the picture but does not look like it is.

[VirginAtlantic]

I understand you are referring to the line of the oil run in the centre of the turbo. I would assume that this line must be kept in an horizontal position?

[MGP]

It must be within 15 degrees of vertical. The oil seals in turbos are not actually seals they are more like scrapers and anything that hinders the path of oil from the turbo will cause them to leak. Because vw mounted the turbo so low and had to have the return pipe below the level of the oil any crankcase preassure could cause the oil to not drain correctly.

[VirginAtlantic]

Thanks I'll revisit the angle of the central oil line and check the angle. regards

[MGP]

Check your breathers as well make sure they are clear and the hoses are in good condition, also are you running with the block breather or just the one on the head. These are a compromised design to start with so everything has to be working well to avoid problems.

[VirginAtlantic]

This turbo came off my 1.6JX engine. I would therefore assume the angle of the oil run through the turbo would be no different to that on the 1.9TDI engine. I have checked the breather which is all good, perhaps as my oil level is on the top of the dip stick line, it's not allowing the oil to run well through the turbo?

[MGP]

Its possible that could be a factor. Are you running a block breather or did you remove it and use the blanking plate from the jx? With the turbo drain entering the sump below the oil level and such a small drop between the turbo and the oil level it wouldn't take much crankcase pressure to stop the turbo draining properly

[VirginAtlantic]

The block breather has had the blanking plate from the JX fitted. so the only breather is running from the rocker to the air intake pipe of the turbo. So you're suggesting to reinstate this additional pipe to reduce the crankcase pressure on the oil in the sump? The turbo oil return is entering at the bottom of the JX sump.