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Fordson Tractors Discussion Forum

Blowing oily smoke!

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Jeff C

10-19-2004 16:48:14




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Earlier this year I changed the oil in my `57 Major diesel, I used 15w40 diesel engine oil, at the time I inadvertently overfilled it. Ever since it's needed ether to start although only a sniff and it starts readily. It seems to be working fine with ample power but it smokes heavily at first and it appears to be blowing black oil out the pipe. I haven't used it a lot since the oil change so this may be the cause of the problem, the oil level has gone down to the full mark however, it was about 1/4" above it. I think that I'm not using the tractor long and/or hard enough! Maybe I should have gone to a 30 wt. oil instead. I did post this question a while back but decided that the tractor had to be placed on the "back burner" as it were. Any thoughts?

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Mark1

10-19-2004 20:08:37




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 Re: Blowing oily smoke! in reply to Jeff C, 10-19-2004 16:48:14  
Does it seem to smoke less after it has warmed up for awhile?I use 15-40 without any problems.



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Jeff C

10-20-2004 17:22:57




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 Re: Blowing oily smoke! in reply to Mark1, 10-19-2004 20:08:37  
Actually it does seem to smoke less after it has been worked a while, but if you give it a swift kick (i.e. give a quick shot of fuel) she smokes noticably heavier for a few seconds. Almost as if the valve guides/stem seals are worn. Something I thought of today!!



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Don Young

10-20-2004 21:18:45




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 Re: Blowing oily smoke! in reply to Jeff C, 10-20-2004 17:22:57  
Sounds to me like you have just gotten the engine overoiled and need to get it under a heavy load long enough to clear it out. Be sure your thermostat is keeping the engine hot enough. Idling and no load running does not keep the combustion chambers hot enough to burn the oil well.



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Jeff C

10-21-2004 07:35:37




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 Re: Blowing oily smoke! in reply to Don Young, 10-20-2004 21:18:45  
I think that you're on to something. I've read within these hallowed pages that these tractors like to be worked. Mine is only a hobby tractor/restoration project, with maybe some money making potential at snowclearing and/or landscaping. I don't use it a lot and I work at sea for months at a time so it spends a lot of time just sitting there. It does run really well however even if it does smoke a bit. Hell, it's nearly 50 yrs old and who knows when its had a rebuild or a ring job last! I'll keep a close eye on the oil level though, I don't think it has excess oil consumption. Maybe a heavier weight oil might still be a good idea. Any thoughts?

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Don Young

10-21-2004 19:26:45




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 Re: Blowing oily smoke! in reply to Jeff C, 10-21-2004 07:35:37  
In general, I do not like to use heavy oils. Most of the engines I have rebuilt have been gummed up and sludged with sticky rings. I may be wrong but I think that a good fresh light oil will be better for keeping the engine clean. It is true that a heavier oil will somewhat increase oil pressure and and somewhat reduce oil consumption if an engine is already badly worn but it also reduces lubrication when the engine is cold. I would not use heavy oil in an engine which is seldom run under heavy load.

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Majorman

10-22-2004 00:02:30




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 Re: Blowing oily smoke! in reply to Don Young, 10-21-2004 19:26:45  
I would go along with what Don is saying. There is one other point though. These engines were designed to run with a series 1 detergent oil. Most of the modern oils are series 3 or higher. This means that you might have cleared 50 years of sludge and carbon from your engine. If you have softened the carbon seal around the pistons this to could give your oil emmision.

I run all my Majors on low detergent oils HD 20/30W or 15/40W but would not use any of the newer synthetic oils. My oil supplier says he sees lots of older tractors with problems after the modern oils have been used.

Just my opinion.

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Jeff C

10-22-2004 07:22:11




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 Re: Blowing oily smoke! in reply to Majorman, 10-22-2004 00:02:30  
Thanks for the info. The oil I used was 15w40, diesel rated stuff, a generic brand from Walmart. I went against what I believe in that I only use Castrol GTX in everything I own! I think I'll change it out again in favor of the low detergent stuff (20/30 HD). The smoke is more of an inconvenience than anything, but I'd like to eliminate it or cut it back somewhat.



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Mark1

10-22-2004 22:24:56




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 Re: Blowing oily smoke! in reply to Jeff C, 10-22-2004 07:22:11  
These are low compression diesel engines.Maybe that is why it might take awhile under load to clean it out.My 1961 didn"t stop smoking until running it awhile at load during the summer months.I have used the same oil from Walmart and it doesn"t seem any different from the Chevron 15/40 that we use in the Detroits.



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Jeff C

10-26-2004 11:17:47




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 Re: Blowing oily smoke! in reply to Mark1, 10-22-2004 22:24:56  
YAHOO!!.....I think I"m getting somewhere. I just started the tractor WITHOUT ether for the first time since the oil change. Maybe it does just need to be used more/harder! I think I"ll switch back to a heavier oil though. Thanks everyone for your input.



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DAC

11-16-2004 15:00:52




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 Re: Blowing oily smoke! in reply to Jeff C, 10-26-2004 11:17:47  
Sorry to join this discussion at a late stage but I was searching the web for what might be a problem with my Dexta and came across these articles and wondered if they"re related....

My 1968 Dexta blows smoke out of it"s breather pipe and I was wondering if a) is this normal and b) what exactly is this. I"m not really mechanically minded but know for a fact that the tractor has always been looked after (i.e. regularly serviced and never over-worked). Is this anything to worry about, and if it is, what"s the remedy. Note: It doesn"t blow oil out, but the inside of the pipe is lined with oil. I"d appreciate a response because I can"t get an answer from anyone else!

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DAC

11-16-2004 15:04:56




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 Re: Blowing oily smoke! in reply to DAC, 11-16-2004 15:00:52  
Sorry, I meant 1958 (just noticed my mistake). This might not be relevant, but just in case....!



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