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White smoke

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G harper

11-08-2012 12:31:58

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I have a ford 640 tractor.It has white smoke pouring from exhaust almost immediately after cranking.I ran it in an extremely dusty environment for a couple hours without air filter at carb intake before it started smoking.It also runs near 210 degrees under load.Have I likely damaged engine from dust through the intake?Or could the white smoke be from a cracked head or head gasket?Smoke doesn't seam too be from moisture and oil stick does'nt show water on it.What shoul i check to see if dust has damaged engine?

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11-08-2012 15:51:08

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 Re: White smoke in reply to G harper, 11-08-2012 12:31:58  
sanding the carb and cyl bores from no air filter merely hurt the engine compression and silica level... ( minorly )...

white smoke at startup and overheat.. I'd be looking at a head gasket first. checking oil for water.. and water for oil.

if you find water in the oil.. don't run her.. coolant will wipe mains fast.

go from there based on what you find.

there are a variety of tests you can do.. including wet / dry compressiuon.. leakdown tests, pressurized cooling sys test.. and if need be.. pan drop and pressurized cooling system looking for drips.

also read plugs. if one is steam cleaned.. you know you have water in the combustion chamber on that lung..

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G harper

11-08-2012 20:58:42

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 Re: White smoke in reply to soundguy, 11-08-2012 15:51:08  
Thanx soundguy

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11-09-2012 15:27:49

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 Re: White smoke in reply to G harper, 11-08-2012 20:58:42  
keep us posted

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Michaels Dad

11-08-2012 15:27:11

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 Re: White smoke in reply to mike841, 11-08-2012 12:31:58  
210, wow that's hot.

My 640 just barely hits 160 when pulling a 7' box blade full of caliche.

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11-08-2012 13:16:56

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 Re: White smoke in reply to G harper, 11-08-2012 12:31:58  
White smoke is usually due to coolant being burned in a cylinder. Cracked head or head gasket leak. Have a look at the spark plugs and see if one is shiny clean.

We call it "dusting" an engine, when you run one without an air filter. Usually that ruins them in a short time.

Is this high temperature something new?? Or has it been going on for some time??

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G harper

11-08-2012 20:56:59

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 Re: White smoke in reply to sixbales, 11-08-2012 13:16:56  
Thanks for your reply.High temperature been going on a long time.Ran hot several years ago.Cracked the head.When I replaced the head it ran fine but compression test revealed 1 cylinder way lower on pressure than the other 3.I son't know but temp stays near 210 maybe more on hot days when using a two row breaking plow.Also use a 48 inch sovema tiller on it.I may have some bubbles in the radiator though.

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11-08-2012 16:09:52

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 Re: White smoke in reply to sixbales, 11-08-2012 13:16:56  
You could be leaking exhaust gas into the cooling system, which would cause high temperature relatively quickly. Look for bubbles in the coolant in top of radiator.

I would fix the head problem first and then check compression. The engine may still run. Oil consumption will likely increase.

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