JD 60 smoking out of vent tube

SB in IA

Member
Let me preface this post by stating I have not a lot of
experience working on motors and thus have somewhat
limited knowledge of them so if something I say doesn't make
much sense try not to laugh too hard.
I have a '54 John Deere model 60. When I put it under a good
load (pulling a 3x14 plow) there is a considerable amount of
smoke or exhaust that comes out of the cylinder head
ventilator tube. When it is just idling you can still see it but not
as much. There is also a noticeable clicking coming from the
cylinder head area. Is the smoke/exhaust normal? If not are
these two problems related? Are my valves out of adjustment
or is it something more? Any input helps. Thanks!
 
SOME smoke out the vent tube is probably NORMAL under load, especially for an engine with some wear.

In addition to any blowby past the pistons, there's a crankcase ventilator pump the draws clean air from a port between the air cleaner and the carburetor and forces it into the crankcase to continuously blow combustion byproducts out the vent tube, which you are seeing.

It basically works in reverse of the modern PCV systems.

It was an important feature in the era before modern detergent engine oils, to keep moisture and acids out of the crankcase, causing sludge buildup, etc..
 
Rings are wore out, mine was doing that to,when I tore it down it had a lot of ring Groove, ended up boring to 045, yours will run a long time that way if you don't mind the blow by, it is normal to hear the ticking of the tappets but it wouldnt hurt to adjust them properly.
 
Adjust the valve lash and just let her smoke when working. It's a lot of bucks to do a proper overhaul.Is the crankcase oil fresh and clean? Or could there be some condensation or gasoline in the oil? You maybe seeing water vapour and fuel vapour from the vent.
The late A and the 60 on occasion suffered seepage from the head gasket . Hopefully that isn't coolant in the crankcase.


[color=darkred:c58f957361][/color:c58f957361]
 

It sounds like you don't really "Work" it a lot...

WORK it for an hour or 2, then look at the vent tube..I will guess it will show far less vapor, once the moisture is cooked out of it..

(Best thing you can do for it is WORK it)..

Ron.
 

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