need info on blowby

Glenn Warner · May 21, 2012

Hi guys ,
been looking for a tractor to just putz around with in the garden,plow driveway in winter etc..
Found a Ford workmaster and according to the photo ad the tractor dont look bad for its age .
The owner states that it has a little blowby ,and would like to know all I can learn
about blowby before I try dealing with him.He also states that it has a Sherman transmission which for me sounds like a good deal . any info would be greatly appreciated. Thanks Glenn

David G · May 21, 2012

The sherman over/under is really neat. All older tractors have some blowby. That is exhaust gasses that blow by the rings into the crankcase. The crankcase has a vent on it to prevent pressurizing it.

Is is excessive?

Roy Suomi · May 21, 2012

Blow-by is the compression seeping past the piston rings in the cylinder bore..Usually indicates a well worn {out] engine..oil consumption is greater when piston rings aren't sealing in the cylinders causing blue exhaust smoke. They're not a bad engine to overhaul..Farmers have been doing they're own rebuilds for eons..

BushogPapa · May 21, 2012

You NEED to have someone you Trust look at it and Work it good and hard..
have a GOOD look at the oil..Before it is started and warmed-up..
It may have 40 Wt with a Half Gallon of STP in it...!!!
Usually, if there is significant Blow-By, there should be signs of oil at key places around the Engine and else-where...that has been blown out and sprayed and be black and a mess...
Beware if the tractor has been freshly Power-Washed..
Now..it MAY be a good tractor..just "Experienced"..it is up to YOU to decide..
Run everything..PTO (check the oil level) and listen for odd noises..
Brakes Good ( Both wheels)?
Power steering OK..?
Coolant Clear (Green)..??
Any leaks..?
Hydraulics work well..?
Tires, etc, etc, etc...
Hope you have found a decent one...!

Ron..

David G · May 21, 2012

Don't scare the poor guy off, a little blowby is normal on an older engine.

Glenn Warner · May 21, 2012

have only seen the photo on yesterday's tractor photo ads . the price didnt seems to out of reason .will email the owner in a couple days ,
see what I can learn . My dad had a sherman trany on an a ford from the early 60's ,cant remember the model but it was on a selecto speed tranny . what a range of speeds that gave him
creeper slow to fast on the road

old · May 21, 2012

Blow by as some call it happen on ALL engines and that is why the newer cars etc have a PCV valve which is a positive crank case vent valve so you no longer notice blow by which happens due to heat in the engine which in turn builds up pressure in the crank case/oil pan so you get what is called blow by. Yes if real bad it can be caused by bad rings but then you also have gray/blue smoke out the exhaust

Dean · May 21, 2012

All engines have some blowby. I would not worry about it unless there is evidence of blowing oil out of the breather or you find other symptoms indicating that the engine is badly worn.

Another point to consider: Ignoring, the (usually non functional) Sherman add-on traction clutch, similar in function to the AC hand clutch, no vintage Ford tractor with a Sherman auxiliary transmission can have live PTO.

Dean

showcrop · May 22, 2012

If, when you go to look at it you take a compression gauge and a vacuum gauge you can tell a lot about the tractor's internal condition. As others state, blow by itself is not that bad, but other conditions such as bad valves, valve seats and guides, as well as bad bearings can accompany the bad rings. You can check bearings by seeing what it makes for oil pressure, provided as another poster said, that it doesn't have gear oil in the crank case. The whole idea is to see what needed repairs will total and thus how it compares to one with a recent verifiable overhaul and good condition.

Leroy · May 22, 2012

The Sherman can only be put in the 4 speed models, it cannot be put in a slectospeed model or a 5 speed model. The slectospeed was a 10 speed in itself. And it was the slowest model and also the fastest model. Remember the Deere.

buickanddeere · May 22, 2012

Keep looking until you find something with live pto and live hydraulics.

Ultradog MN · May 22, 2012

Workmaster Does have live hydraulics and Might have lpto.

Texasmark1 · May 22, 2012

Sounds like a ton of great info and I can't add a thing to it except for this.

I had a 4010 JD diesel that had some and the pipe was right under the operator's station. Wasn't a lot and the engine was extremely strong, but it seemed to always be in my face.

I drilled a 1/2" pipe thread in the intake manifold and stuck in a hose barb to which I connected a piece of vinyl garden hose and it fit the tube perfectly.......wala PCV without the valve. Worked great and would do it again in a heart beat.

Mark

need info on blowby

Glenn Warner

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David G

Well-known Member

Roy Suomi

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BushogPapa

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David G

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Glenn Warner

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old

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Dean

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showcrop

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Leroy

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buickanddeere

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Ultradog MN

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Texasmark1

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