It is not uncommon to get some "smoke" out of crankcase vent tube on a higher hour engine. Especially under heavy load. It would be a good idea to check and monitor your fluids as suggested above. If everything looks alright, you are probably just experiencing a little blow-by under load.
smoke out vent tube
- Thread starter west7323
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You are correct. The kicker on this one is the milky snot in the vent tube. Sure sign of anti freeze.
jenkinsph
Super Star Member
May need some new piston and liners soon, that should make it a new engine so to speak.
ole farmerbuck
Silver Member
If it starts good, I wouldnt worry about it. Make sure the engine temp is up where it's suppose to be. Too cool engine temp will cause milky condensation in the tube too. I have irrigation engines that do it and never add water.
boomer1025
Platinum Member
If it's not using coolant, then it's not coolant related.
Sounds like normal crankcase vapor for an older engine, since you said it use's a quart of oil in 10 to 15 hrs. All engines new or old have pressure in the crankcase and some brands of oil burn off faster then others. You could try using a different brand of oil next oil change or add some Lucas Oil Stabilizer/Treatment to the oil.
If it has good power & starts good, I'd run it.
One last thing the harder you work an engine the more vapor you'll get out of the vent tube. On newer engines that vapor is drawn back into the intake and burned again.
How many Hrs on this engine ???
Egon
Epic Contributor
If the antifreeze keeps it's level the cooling system part should be ok. [as has been stated]
Also the temperature remains within its operating range.
Oil level goes down with use can be quite normal.
If it sits for long periods of time condensation may accumulated in the oil pan. This will vapour off out the crankcase breather as the engine heats up.
One suggestion is the valve oil seals are getting worn and brittle which will allow some combustion vapours by. This will show up at the crankcase breather vent just as you have described. Under load it would be more evident. It may also be where the oil is being used.
The chances are all is good and the tractor can be used.
Please note that I have no mechanical qualifications but do own an adjustable spanner and have scarred knuckles.:laughing:
Also the temperature remains within its operating range.
Oil level goes down with use can be quite normal.
If it sits for long periods of time condensation may accumulated in the oil pan. This will vapour off out the crankcase breather as the engine heats up.
One suggestion is the valve oil seals are getting worn and brittle which will allow some combustion vapours by. This will show up at the crankcase breather vent just as you have described. Under load it would be more evident. It may also be where the oil is being used.
The chances are all is good and the tractor can be used.
Please note that I have no mechanical qualifications but do own an adjustable spanner and have scarred knuckles.:laughing:
about 6800 according to the meter. i bought the tractor last year. it sat all winter long and started up as soon as i turned the key last week. it does have decent power for a 45 year old tractor. it did smoke out the vapor tube some last year but seemed worse yesterday when i was working her a little. maybe it is condensation in the oil from the winter. i live in syracuse ny so the winter was very cold and long and it sat in the barn for over 5 months. i put it away with clean oil and filter. also checked the oil and it was not milky or foamy. i wonder sometimes if the **** ethanol they put in the gas now screws things up on these older engines. thanks for the input.
jenkinsph
Super Star Member
If it is a gas tractor then it is very possible that the ethanol fuel absorbed water over the winter. The new fuels don't store nearly as well as the old gasoline. Best to make sure the tank is full (less air space inside the tank) and add a stabilizer to the fuel before putting away for the winter.
One way to be sure is to take an oil analysis. Also sitting that long some antifreeze could have leaked in to the crankcase and it is evaporating. One thing I know for sure is that if you are getting a creamed coffee color gel like goo in the breather tube it is antifreeze.:thumbsup:
