4300 exhaust smoke

[steviep]

Earlier this year the engine on my 4300 was rebuilt. Since the rebuild the engine has started and run pretty good except for when it first starts it has a large cloud of what looks like blue smoke. My oil is still full and looks fine. The anti freeze looks fine too. The engine has less than 50 hours since rebuild and it seems to lessen the more it runs. Any help is appreciated.

 

[beenthere]

How many hours on the engine before the re-build?
Any idea what precipitated the need for a re-build and how extensive was it?

Hopefully the engine will settle in and clear up the smoke problem in due time.

 

[texasranger556]

Blue would most likely be raw diesel or possibly oil. Can you tell which from the smell?

 

[sweettractors]

Earlier this year the engine on my 4300 was rebuilt. Since the rebuild the engine has started and run pretty good except for when it first starts it has a large cloud of what looks like blue smoke. My oil is still full and looks fine. The anti freeze looks fine too. The engine has less than 50 hours since rebuild and it seems to lessen the more it runs. Any help is appreciated.

Could be that the rings never seated and/or not correctly rebuilt? Ken Sweet

 

[steviep]

The engine had about 1000 hours, the reason for rebuild was a little thing called starting fluid.The engine was bored with new pistols and rings plus the head redone. It was done by a reputable local machine engine rebuild shop. As far as smell I don't know.

 

[sweettractors]

The engine had about 1000 hours, the reason for rebuild was a little thing called starting fluid.The engine was bored with new pistols and rings plus the head redone. It was done by a reputable local machine engine rebuild shop. As far as smell I don't know.

Sometimes a rebuild does not bring a engine back to the performance levels of new. If you don't smell strong diesel in the exhaust, it probably is oil causing the smoke. Hopefully, it will get better as you add more hours. Ken Sweet

 

[Notforhire]

Just throwing this out there.
My 5055e started emitting blue smoke. The problem was a pinched fuel line. Not enough fuel was being injected, which caused poor combustion.

 

[kuboman]

If you can put it under load do that. It needs a good long hard workout.

 

[rekees4300]

when it first starts it has a large cloud of what looks like blue smoke.

My 4300 has always (17 years) done this, it's normal. Just diesel fumes due to cold engine. Don't worry about it.

 

[texasranger556]

My 4300 has always (17 years) done this, it's normal. Just diesel fumes due to cold engine. Don't worry about it.

Blue smoke?? My 4400 gives a short puff of black smoke when it starts, not blue.