Oil out exhaust on cold start

[westcoaster]

Doing an engine conversion of a 1.9aaz into a samurai.

Fired the engine up for the first time in 6 or so months and promptly painted the firewall black from all the oil that flew out the turbo.

After running it for several minutes, things cleared up and no more oil out the turbo (ok, still a drip or two but that could be residual from the initial blast)
It appeared to idle clean and clear with minor diesel smoke on snap acceleration.


Valve guide seals?
Don't think it's a turbo...

I'm using 15W40 diesel oil

Thanks,

[libbydiesel]

It may not even be an issue.  Was it a used engine?  Was the turbo on the engine prior to install?  Was there oil in the engine?  If the engine is tipped with oil in it and the turbo installed, the oil will flow up the return line and out into the compressor and turbine.  Next time it is run it will blast the oil out. 

[westcoaster]

It was a used engine I pulled from the '97 jetta car.

ODO has 430,000km but the engine has the D shaped crank nose. It's unclear if/when that was changed.

I never touched the turbo, yes, oil in the engine fresh change to 15w40.

I didn't think I tipped it enough for oil to flow up the return line but one never can tell....


I had a 1.6td that would blast oil out the turbo any time it sat for a couple weeks. Got to the point of dribbling down the side of the block from the #4 exhaust port (between head and manifold) even when running...

[burn_your_money]

Exhaust valve stem seals/guides or turbo are the only culprits I can think of. What Libby said is very valid. If it only did this once I wouldn't worry about it.

[westcoaster]

I guess if I pull the manifold and found it to be dry, that would be a good indicator between valves and turbo...

It's a bit more than a one time splat....


Just not too sure as to it's severity yet...

[theman53]

I guess if I pull the manifold and found it to be dry, that would be a good indicator between valves and turbo...

It's a bit more than a one time splat....


Just not too sure as to it's severity yet...

If your manifold is clean on the inside it won't be valves, they are pre manifold.

Since it is not one time and paints your firewall each time you fire it up, clean it up and have someone else turn the key and look to see what is going on. If you can pinpoint an area it is coming from you maybe able to figure it out quicker. Pics/video of the problem helps people to see what is happening to help online as well.

[ORCoaster]

We need a web cam feature to get real time looks at these problems.  But a video of the start up might work for him as well as us if he can't find a key turner.  Sometimes that is my problem, well one of them anyway.  Just no one around when you need 5 mins of spare hands.

[westcoaster]

Ok, not a web cam but a crappy cell phone video....

https://youtu.be/aPJ2_7txi3Y


only smokes like this after it's been sitting for a few (4) days. At idle it clears up, will smoke blue for a block or so when it's run.

After a really good run it's clear.

Start it the next day it won't smoke like this.

Valve guide seals is what I understand this to be and probably valve guides as well.

Worth the effort to just replace just the seals?

This motor has ingested some dust/sand. previous owner didn't ensure the air cleaner was on right.... next to no oil blowing out the breather tube.

[theman53]

Not a big deal I don't think

[burn_your_money]

Valve stem seals are a pretty easy place to start with. If you can rig up your compressor to put 100psi or so into the adjacent cylinder you are working on it will keep the one you are working on at TDC so you don't have to worry about dropping the valve. If it's only a temporary fix then you know the head needs to come off to do the guides.