Hi. Thanks for using JA! I will try and help you out.
It sounds like you have a problem with the #3 cylinder. If #3 is the only one doing this, you may need to go back into the engine and remove #3 piston and investigate.
But first, does the engine have any miles on it after the inframe?
From your question it sounds like the engine has not been out on it's first run after the inframe. If it has not, I would recommend taking it out and loading the engine. Maybe even letting the driver take it on a short run. There may be a ring seating issue on #3 and it may clear up after the engine has been run under a good load for a while.
Please let me know if you have any more questions.
Thanks for the information.
If there is a problem with the rings on #3 piston it could possibly scratch the liner. However, I do not think the engine will suffer a piston skirt failure. That normally occurs when the piston gets overheated. With an oil control ring problem, you should just see oil passing through the cylinder.
If it was me, I would let the unit go out on a loaded run. If there is still a problem after the run with #3 cylinder passing oil, then I would go back into the engine.
thank you for the advice .have you seen this symptom often & does a good run in normaly stop this slobbering problem.
You are welcome.
Yes. I have seen this several times in the past. 90% of the time, a good long hard run clears up the oil from the cylinders.