increased smoke after filter change

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vasant

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hi all,
So i have this ancient MD7A that is still running well and as summer arrived the standard maintenance was carried out.
Oil filter swap, oil change, primary and secondary fuel filters.
After this i bled the lines and the engine started fairly easy. Had also some shorter trips with total time of engine running about 5 hrs.
I am pretty sure the engine is having more white smoke than it used to have. I am also sure its not constant . So there are blows every lets say 30 secs where more smoke comes out .
I bled again the system to purge air, engine cranks immediately, water flow is good.
Any other idea?
 
As a rule of thump, white smoke is water, blueish smoke is oil burning, and black is unused /rich fuel. What you are describing should have no relation to the white smoke that you are observing, unless you have been unlucky and the cylinder head gasket has gone. Did the engine reach working temperature?. I presume that you have used the correct oil viscosity.

These Volvo engines are very robust and provided that they are looked after, they dont give any problems. I always use fully synthetic oil, (used on my 50 year old MD11C) but this is my personal preference, especially for an old engine that requires superior lubrication oil. Keep an eye on the compression and excess white smoke in case is the head gasket. I am sure you will get more replies here soon.
 
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As Graham376 has said, it could be steam due to overheating. The cylinder head water channels can get blocked with calcium easily because is raw water cooled engine. If this is the case, it will be good to flush the engine with a descaling acid solution. You can remove the temperature sensor which is located on top of the cylinder head and pour in the descaling solution or use other means.
 
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CAPTAIN FANTASTIC said:
As a rule of thump, white smoke is water, blueish smoke is oil burning, and black is unused /rich fuel. What you are describing should have no relation to the white smoke that you are observing, unless you have been unlucky and the cylinder head gasket has gone. Did the engine reach working temperature?. I presume that you have used the correct oil viscosity.

These Volvo engines are very robust and provided that they are looked after, they dont give any problems. I always use fully synthetic oil, (used on my 50 year old MD11C) but this is my personal preference, especially for an old engine that requires superior lubrication oil. Keep an eye on the compression and excess white smoke in case is the head gasket. I am sure you will get more replies here soon.
Click to expand...
White smoke = unburnt fuel. Black smoke = insufficient air. White vapour = water.
 
Unlikely - but could it be that the engine doesn’t like that particular oil (viscosity/kinetic visc)? Maybe it’s getting past the rings or valve stem oil seals in enough quantity to smoke? Complete guess though, of course.
 
thanks for all considerations.
The engine gets warm but not really hot. Water is generally ok and i dont think there is overheating.
In any case i never use any synthetic oil on this old engine.
 
vasant said:
thanks for all considerations.
The engine gets warm but not really hot. Water is generally ok and i dont think there is overheating.
In any case i never use any synthetic oil on this old engine.
Click to expand...
One of the causes of white smoke is the engine not achieving operating temperature. Low temperature in the combustion chamber.
 
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