smoking oliver

tumbenhour · May 31, 2014

Got an oliver 77 gasser that smokes like a
freight train. Did a compression test dry all six
cylinders where exactly 150 psi.
Runs real smooth, plenty of power, just a smoke show, so far
I"ve cleaned the crankcase breather, fixed a broken oil line on the rocker shaft. ran the engine with the valve cover off,everything appears ok , didnt seem like a lot of oil flying around up top to be valve seals, could it be oil rings bad with that much compression? Also it has 185402 cast on the head
and 185220 m100 on the block, serial number is 345916 c77d Any idea"s would be appreciated thanks.

duane o. · May 31, 2014

Check the hose from the air filter to the carb. It will be split or cracked allowing air and dirt past the air cleaner dusting the engine. Or there is or has been no oil in the air filter pot still dusting the engine oil rings. The oil rings are the thinest rings most easilly damaged by dirt. Our 880 was the same way. Hose between the air cleaner to carb was split. Replaced the hose and re ringed the engine and ball honed the cylinders. Put it all back together. Runs like a top. 6 years now and used daily. No lil burned between oil changes. Hope this will help in your diagnosis. Duane o.

Dblair · May 31, 2014

needs seals on the valve guides

tumbenhour · May 31, 2014

where can i find valve seals?

oliver90owner · Jun 1, 2014

What colour smoke?

Probably not rings if compression is so good and so even.
Possibly valve guides shot or seals rotten/missing.

Could be oil dragged through air cleaner?

Need a little more detail than given, like colour, history, engine temps, crankcase breathing, when it smokes most, oil consumption, engine loads.

Freight trains to me cojures up working at full power and plumes of black smoke.

Could just be too much fuel.

Dblair · Jun 1, 2014

I take my heads to a Napa machine shop and have
racing seals installed .

agonair · Jun 1, 2014

My 88 had a smoking problem and was even slobbering oil up the exhaust. Compression was good. Pulled the head and discovered two things. One, the valve seals were bad and two it had a couple of hairline cracks.
One rebuilt head later...no smoke and no oil slobber.

tumbenhour · Jun 1, 2014

The smoke is blue or kinda white , lots of oil in exhaust stack
Dont know its history, just took it in on trade, None of the guages
work, Have not had it long enough to really work it.
Just drove it up a steep hill in the back yard,
throttle is really responsive , when i say it smokes like a freight
train I mean its a mosquito fogger , ever watched a diesel coal
train go by pulling a mile of coal cars? well you get the idea.
I've put new coolant in radiator, that seems to be fine its not
mixing with oil, changed oil also but have'nt ran it enough to see
how fast it consumes it.
I'm thinking with the broken oil line to the rocker shaft it starved
the valve guides for oil I'm hoping a head job fixes her up.
what do you think?

Cas · Jun 1, 2014

If it is not a plugged air cleaner or stuck choke, I would still give the carburetor a good look over.
I have had good luck using the older chevy style umbrella seals on waukeshau engines with guides that were worn.
One time I worked on an engine that had the rocker arm bushings wore to an oval and it did not burn oil. The oil line your talking about was missing for years according to the owner. He thought it was spray lubed from the back bolt.

tumbenhour · Jun 1, 2014

I was wondering if small block chevy seals might fit.
It is my understanding that the waukesha didnt use
valve seals on the exhaust side. Should I install them anyways? Anyhow i will try
valve seals first, cause that cost the least.
I used a laser thermometer on each exhaust port on the manifold
#1&2 egt was only 220 f all others were between 490 and 510 f
I imagine that oil is keeping the egt's down in those two cylinders
what do you think?

oliver90owner · Jun 2, 2014

They did not fit seals on exhaust side because there is no pressure differential to draw oil down the guides like on thed inlet side.

The only tractor I have had with no oil feed to the rocker shaft, ran the shaft (not the rockers, IIRC). Rocker pads were worn, mind.

You could check the plug deposits, or the valve stems after removing the manifold, to get some idea of where the oil is going down, but seems like it may need a head job. Rubbish guides don't do the valve seats any good in the long run

Dick W. · Jun 2, 2014

After reading all the responses I would check the fuel in the tank. Maybe someone added some diesel fuel. The smoke you see would quickly short the spark plugs if it is all oil.

Dick L · Jun 2, 2014

If it set without running for a long time an oil ring could be stuck but that would foul plugs. Like below I would get some fresh gas in it.

tumbenhour · Jun 4, 2014

Finished changing valve seals today does'nt smoke
no more, does'nt smoke any less either. L.o.L
I guess i will put new rings in it next.
wish me luck.

smoking oliver

tumbenhour

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