763bobcat blowing smoke

[bigmerc34]

hello all new here I have a friend that has a 763bobcat with a v2203-e kuboat motor in it when you start it it will blow smoke out of the tailpipe but when it warms up and pull the oilcap off it will blow out of there.that cat runs strongs didn't lose any power I looked under the motor and saw what looked like oil any help would be great and again ty [email protected]

 

[Jyuma]

Sounds like you are describing two different problems. Smoke out the tailpipe indicates something going on in the combustion chamber... like oil leaking past the valve guide seals. Smoke out the oil inlet is indicative of blow-by which would be caused by rings or cylinder issues.
You didn't say if the smoke out the tailpipe stops after warm up. If it does then I would definitely suspect valve guide seals or head issues. If it doesn't then look for some way oil is getting into the combustion chamber. bTw... you didn't say what color the smoke is or if you were loosing coolant.
I don't know if your engine uses a PCV (positive crankcase ventilation) or a road draft tube. If there is a PCV then check that first.
You didn't say how much oil was under the engine. I have a V1902 Kubota and if I looked under my engine and didn't see a little oil... I'd wonder if I was out of oil.

 

[Tazza]

Sounds like you are describing two different problems. Smoke out the tailpipe indicates something going on in the combustion chamber... like oil leaking past the valve guide seals. Smoke out the oil inlet is indicative of blow-by which would be caused by rings or cylinder issues.
You didn't say if the smoke out the tailpipe stops after warm up. If it does then I would definitely suspect valve guide seals or head issues. If it doesn't then look for some way oil is getting into the combustion chamber. bTw... you didn't say what color the smoke is or if you were loosing coolant.
I don't know if your engine uses a PCV (positive crankcase ventilation) or a road draft tube. If there is a PCV then check that first.
You didn't say how much oil was under the engine. I have a V1902 Kubota and if I looked under my engine and didn't see a little oil... I'd wonder if I was out of oil.

Nice one Jyuma, my engine looks that way too
As already stated, there are different types of smoke. Black is generally too much fuel, or a bad injector. White is un-burnt fuel. Blue is burning engine oil.
How does it start from cold? is it easy? or does it crank for a bit to get going. These engines iven when cold should fire right up.

 

[bigmerc34]

Sounds like you are describing two different problems. Smoke out the tailpipe indicates something going on in the combustion chamber... like oil leaking past the valve guide seals. Smoke out the oil inlet is indicative of blow-by which would be caused by rings or cylinder issues.
You didn't say if the smoke out the tailpipe stops after warm up. If it does then I would definitely suspect valve guide seals or head issues. If it doesn't then look for some way oil is getting into the combustion chamber. bTw... you didn't say what color the smoke is or if you were loosing coolant.
I don't know if your engine uses a PCV (positive crankcase ventilation) or a road draft tube. If there is a PCV then check that first.
You didn't say how much oil was under the engine. I have a V1902 Kubota and if I looked under my engine and didn't see a little oil... I'd wonder if I was out of oil.

Hello there and ty you for the post. the smoke does stop out of the tailpipe when it warms up but when you take the oilcap off smoke then comes out of it it looks blue or gray like I said it belongs to a man I know I dont know that much about them and for the oil under the motor there looks like there is more then there should be and smoke looks like its blowing from under the motor also ty for your help

 

[Tazza]

Hello there and ty you for the post. the smoke does stop out of the tailpipe when it warms up but when you take the oilcap off smoke then comes out of it it looks blue or gray like I said it belongs to a man I know I dont know that much about them and for the oil under the motor there looks like there is more then there should be and smoke looks like its blowing from under the motor also ty for your help

If there is smoke when you take the filler cap off that means you have blow-by. Its exhaust getting past the rings and into the crank case, it has to go somewhere. There will be a breether tube that is either plumbed back to the inlet manifold or it will be vented to the outside of the engine, that's probably where the oil is coming from. The exhaust will be a mixture of oil and exhaust.
If its working fine, leave it alone and just give it a clean every few times you use the machine to keep the mess from the oil down.