Valve seals on a farmall c

Raymond in Co · Aug 8, 2009

I recently purchased a 1949 Farmall C and it smokes a little through all ranges of operation. Does it have valve guide seals? I have a case that does not. If it does have seals , is it a difficult job to replace them? Thanks.

Bob · Aug 8, 2009

NO valve seal uneess someone has popped some on after it left the factory.

Raymond in Co · Aug 8, 2009

So I guess the rings must be letting blow by get by, and that is what is causing it to smoke.

ScottyHOMeY · Aug 8, 2009

It could be leaking around the valve stems, as well. They didn't come with seals, but putting some on (they're available) might be a quick temp fix. Blue smoke at startup that cures itself with warmup is generally but not exclusively an indicator of leakage around the valve stems.

JDemaris · Aug 8, 2009

Many overhead-valve tractor engines as well as car/truck engines did not come with valve-seals new. In the 60s, Chevy small-block V8s were known to be smokers when the valve guides got worn. They had no seals when they left the factory. Had to add seals to many. Just because and engine didnt have them new doesn"t mean it doesn"t need them now. If it tends to smoke when holding back in a low gear coming down a hill, or at first start, etc, - valve-seals can probably help a lot. If it smokes when being worked, it"s more apt to be a piston/ring/cylinder problem.

I"ll add that many companies that made heavy-duty engines designed the heads and valve guides to leak a little oil and smoke, when new. The reasoning was that this added lube would extend the life of the valve stems and guides. It was also expected that once worn, seals could be added later. You can usually add seals to a four cylinder engine in an hour.

teddy52food · Aug 8, 2009

The chevvy small blocks had those square o-ring seals. If they were not installed correctly, then they were smokers.

JDemaris · Aug 9, 2009

Yes, but they weren't valve-stem seals. They only sealed the valve-retainer to the top of the valve-stem and offered no sealing at the valve-guide itself. Also, they were only used on the intakes and none on the exhaust. The standard repair was for a SB smoker was to either put new umbrella seals on all valves (the cheap fix), or . . . cut the valve-guide bosses down to accept stationary seals the pressed on to the valve guides.

One note of trivia is that John Deere was kind of ahead of it's time with those stationary seals. They used them on the 1010 and 2010 engines in 1960.

teddy52food · Aug 9, 2009

They were used on the exaust also. What engine are you referring to? They were used on the 6 cylinders back in the 50's before the v8's. If they didn't seal, why did they use so much oil if not installed right?

Valve seals on a farmall c

Raymond in Co

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Bob

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