Smoking cub update

[1948CUB]

Well, it looks like the Sea foam treatment cleaned up the engine. It cleaned it so good it smoking
a lot worse now. Looks like I'm going to need a rebuild. Does anyone know of someone in central
Alabama that does rebuilds? Tractor cranks and runs great but a lot of smoke now. At high RPM's
I can see a little oil on the exhaust.
Thanks in advance for any help !

Danny

[Barnyard]

Has all the seafoam cleared from the system? Seaform will smoke like crazy until it is all gone.

[1948CUB]

I did change the oil but there is still some in the gas. I have added some gas to the tank
but I'm sure there is still a good amount in there. Will the sea foam in the gas look like
bad oil smoke?

Danny

[staninlowerAL]

How's your oil pressure? Smoke exhaust usually indicates worn rings. AlabamaFarmBoy is in your area and posts occasionally on the forum. You might try a PM to him.

[Barnyard]

If you still have seafoam in the gas it will smoke. Give it time to clear the system completely.

[Scrivet]

How long and how hard did you run it with the seafoam in the oil? You need at least an hour of working it hard, not just putting around.

[havoc1482]

Just an FYI: Its 1oz of Seafoam to 1 gallon of gas. If you make a stronger mixture it won't hurt anything but it will smoke until its all cleared out.

The cubs tank is only about 7.5 gallons and a can of Seafoam is 16oz

[1948CUB]

Thanks to everyone for their reply!!

I probably added to much to the gas tank and I did run it but not extremely hard.
I will have another go at it and see what happens before I take major steps to rebuild.

Thanks again for the help!!

Danny

[Mike in Louisiana]

Have you done a dry and then wet compression test????????
Post the numbers

[thiggy]

Like Mike, I think you should do a compression check before you tackle anything more extensive.

[Matt Kirsch]

One more vote here to give it more time. Even if you dumped the fuel now, there will still be residual seafoam in the engine that has to burn off before you can make any sort of judgement call.

The smoke just means it's working at this point.

[gitractorman]

One more vote for running her more! Also, the Sea Foam tends to break up a lot of the carbon in the engine, and you'll see it in your exhaust. If you have a vertical exhaust, you may see it on your ceiling in your garage, or all over your nicely painted tractor hood....... Don't ask me how I know this!

Anyway, if it's running good, put her to work and let the Sea Foam keep working. A compression check is a good thing too, but if she's running, has good oil pressure, and not using oil, then put her to work!

[1948CUB]

Thanks all !

I ran it for a while with the new gas in the tank ( 1 hour ) and she
is smoking but about 1/4 as much. I have noticed some oil spots
on the drawbar just behind the muffler. Its just a few but they are
there after the run. I guess it could be from the left over oil in the
muffler. Looks like a compression check is next. What should the oil
pressure read?

Thanks again for the help!

Danny

[1948CUB]

Hi All,

Just got my compression tester. I did a dry test and all cylinders check 120.
Anyone have any ideas of more testing before I pull the engine? I figured I had
low compression but it seems ok. Could it be valve guides?

Thanks for any help!

Danny

[Eugene]

Oil pressure. Oil gauge red and white zones. Cold engine start up, the needle should peg or nearly peg in the white. Hot engine, low idle, the needle should be above the red zone. Maximum oil pressure, around 35 psi.

Oil being sucked through the valve guides is usually not a significant problem with a flat head engine.

I wouldn't pull the engine with 120 psi, dry test, on each cylinder. Suggest working the tractor for an extended period of time.

What is the history of this tractor - engine?