Farmall super A

hcarr · Jan 23, 2017

I have a 1948 Farmall Super A that needs some work. It is blowing out I believe gas mixed with oil from a small relief hole (I think) under the intake manifold It is getting all over the carb and generator. It is also smoking (Burning Oil). It is hard to start and I pulled the spark plugs and the first 2 at the front of the motor are oil soaked and the back two seem to be firing ok. Also the exhaust manifold where the front two plugs are is different looking than where the back two are. It looks like it is getting hotter . Any help would be greatly appreciated. Thanks Howard

47fivewindow · Jan 23, 2017

I would start with some new spark plugs and post back.

C. Amick · Jan 23, 2017

How's the oil pressure when the engine warms up? Could just need some new piston rings? Drain a little oil out of the oil pan when cold to make sure you aren't getting any coolant in the oil.

hcarr · Jan 23, 2017

(quoted from post at 17:42:35 01/23/17) I would start with some new spark plugs and post back.

Thanks, I am going to get new plugs tomorrow, but I am thinking that they will get dunked up soon after. The plugs I took out are AC Delco C87 are they the right ones?

hcarr · Jan 23, 2017

The oil pressure is at 50 on startup and when warmed up drops to 20. Do you know anything about the little hole under the intake manifold it is prob about an eighth of an inch that is where a lot of pressure is blowing out smoke and what I think is a gas and oil mixture. Thank you.

Hobo,NC · Jan 23, 2017

Off hand the hole does not ring a bell. I have seen those smoke, blow oil and fowl plugs a valve adjustment resolved the issue but did not make up for years of ware and tear.

Check valve adjustment...

Steve@Advance · Jan 23, 2017

The C87 is a good plug number for that engine.

While you have the plugs out, run a compression test. If you hear the compression blow out the hole on the manifold side, there is a problem.

I can't imagine there would be a hole there...

Sounds like it may have a head gasket blown to the outside. Or possibly a blown exhaust gasket, cracked manifold, burned out exhaust. Look the area over very closely, try to verify where the leak is.

4wdtom · Jan 24, 2017

A hole in the intake manifold would be a vacuume leak. You may have other problems too but I would look close at the manifold. Maybe take it off and check it out bood and
put it back with new gaskets.

Texasmark1 · Jan 24, 2017

Farmall Super A was my first tractor; no implements or anything, just bare tractor. Paid $400 for it back in 1979 when I became a rural resident.

denglish · Jan 24, 2017

I'd probably check compression next. Also, you can post your questions in the Farmall/International forum down below this one. You will get more answers from people who work on Farmalls a lot.

C. Amick · Jan 24, 2017

It just occurred to me you might have a valve problem. Check the valve clearance and make sure the push rods are straight. If an intake valve spring was broken, seems on the compression stroke it would blow out the intake manifold. A compression test might tell you where the problem is.

hcarr · Jan 30, 2017

well I guess the motor needs torn down. The compression is 45 in the first cylinder,0 yes ZERO in #2 50 in 3 and 30 in 4 even tried a teaspoon of oil in #2 and still stayed on zero! The push rods are all straight and nice and clean along with the rocker arms. Guess I'll have to pull the head and have the valves looked at. Do you think I would be okay with just a valve job or do I need to drop the oil pan and take the pistons out.

(quoted from post at 19:34:11 01/24/17) It just occurred to me you might have a valve problem. Check the valve clearance and make sure the push rods are straight. If an intake valve spring was broken, seems on the compression stroke it would blow out the intake manifold. A compression test might tell you where the problem is.

Farmall super A

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