L295DT exhaust smoke

[Barros]

good day,

I think my L295 DT has a small problem on engine system. Exhaust smoke is coming out of the engine crankcase breather tube. I don´t see oil spils on it. This problem appears when the engine is submited on heavy work, so the flow of smoke increase significantly in this high engine rotation regime. Is it normal? What can I do?

thanks in advance for support

kind regards

F. Barros

 

[Stumpy]

How many hours are on it? What color is the smoke? Does it do it when it's full warmed up? Also how cold does it get where you are? I believe they all blow white smoke out the breather to some extent when it's cold (below 5-10C) til the rings and pistons come up to temperature and expand.

 

[Barros]

How many hours are on it? What color is the smoke? Does it do it when it's full warmed up? Also how cold does it get where you are? I believe they all blow white smoke out the breather to some extent when it's cold (below 5-10C) til the rings and pistons come up to temperature and expand.

good morning,

I don´t know the number of working hours because the counter is not working. During the start up phase in fact I see only white smoke but after some few minutes working on farm the colour is changind to grey and the flow is increasing too.
In the morning the outside temperature is about 8ºc. For example yesterday after 3 hours working with L295 I saw small oil leakage on gasket head cover on top of the engine.

Thanks Matt on your fully support

Regards

F. Barros

 

[ipz2222]

This usually means you have "blowby". Compression in the cylinder is blowing by the piston rings or a crack or hole in the piston. This goes down into the engine case and out the breather vent, the harder the engine works, the more "blowby" is created.

 

[Stumpy]

As I said a little is normal especially during cold startups but if it's increasing as it warms up you may have a problem. Here's a video of a Cummins exhibiting what I would call normal blow by for a cold engine. It should decrease as it warms up and become more invisible.

In a diesel blueish gray smoke could either be excess fuel or oil burning but coming out of the breather tube indicates it's probably ring leakage. You may have a cracked ring, the engine might have been overheated and the cylinder walls are scored or it may just be worn out. I'm not sure how mechanically inclined you are but if you can get your hands on a diesel compression tester and\or a leak down tester (even better if it comes with a friend who knows how to use it!) that that'll tell you the story. If you want to try it I can elaborate.

 

[Barros]

As I said a little is normal especially during cold startups but if it's increasing as it warms up you may have a problem. Here's a video of a Cummins exhibiting what I would call normal blow by for a cold engine. It should decrease as it warms up and become more invisible.

In a diesel blueish gray smoke could either be excess fuel or oil burning but coming out of the breather tube indicates it's probably ring leakage. You may have a cracked ring, the engine might have been overheated and the cylinder walls are scored or it may just be worn out. I'm not sure how mechanically inclined you are but if you can get your hands on a diesel compression tester and\or a leak down tester (even better if it comes with a friend who knows how to use it!) that that'll tell you the story. If you want to try it I can elaborate.

Thank you for your explanation.
I believe that it has a litle ring leakage because during the sart up phase I only see white smoke, The question appears when the engine is workloaded. I don´t think the engine have been overheated because I don´t see any damaged gasket.
I put 15W40 engine oil. Can I solve this small problem by using a different oil type?
I will try to get some pictures to support my explanation

kind regards

F. Barros