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200 lc engine trouble

W

Wes Jackson

Well-Known Member
Joined
Nov 11, 2018
Messages
85
Location
Florence SC
The engine started smoking really bad suddenly,I have eliminated the turbo as the problem and removed the exaust manifold and smoke and small droplets of oil are coming from number 3 cylinder. I do not have a compression gauge to check the compression but the engine is not skipping and has very little blow by. When I crack the injector line the engine skips as it should. I have already swapped injectors with the 1 next to it, is there anything in the head that could cause this, valve guide seal maybe?
 
John C.

John C.

Senior Member
Joined
Jun 11, 2007
Messages
12,870
Location
Northwest
Occupation
Machinery & Equipment Appraiser
Blue smoke indicates a little unburned fuel or engine oil. How many hours on this machine and engine?
 
T

thepumpguysc

Senior Member
Joined
Mar 18, 2010
Messages
7,535
Location
Sunny South Carolina
Occupation
Master Inj.Pump rebuilder
Blue smoke is usually OIL.. it might be the valve guides are worn, allowing oil to seep into the combustion chamber while running..
Some manuf. use valve guide seals that get hard & allow the oil to seep.. while others don't use them at all & rely on the tightness of the guide to control the oil..
I've also known people that put them on even tho the engine doesn't take them..
 
funwithfuel

funwithfuel

Senior Member
Joined
Mar 7, 2017
Messages
5,600
Location
Will county Illinois
Occupation
Mechanic
If you have the manifold off, take a strong flashlight and peak into the port. You may see something. If you have one of those cheap Chinese borescopes you could look a little deeper. Do you hear any unusual huffing in the air cleaner housing while running?
Have you checked valve lash @ #3 ? Is it tight? Can you establish lash at all? From your description, it sounds like bent/ burnt/ broken valve. Best of luck.
 
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