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Ford 9N, 2N & 8N Discussion Forum

Loosing oil out of my fill neck

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Alan-Kansas

04-23-2007 15:58:26

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I've got a problem loosing oil out of the oil fill cap on my 8N Ford. When pulling a load of any size and having the oil filled to the top of the hatch mark on the dip stick, oil will be almost running out. It gets better as the oil level drops, but continues to drip until the oil level reaches the "add oil" mark on the dipstick. By that time, the oil pressure has dropped from 20 psi, when the oil level was at 1/4 full, to 0 psi, when the oil level is at bottom of the hatch mark. Under a load there's a continuous white smoke coming from the oil fill. The white smoke and the dripping both stop when the oil level gets just below the add oil mark. Anytime I remove the filler cap while the engine is running, there will be a splattering of oil coming out. Oil is not cheap. It uses about a quart an hour if I fill it a 1/2 quart at a time and continue to run it with the oil pressure guage at 1 psi or even 0 psi. About 5 months ago I had the head and block surfaced and a new head gasket put in to fix the bubbling radiator. That fixed the bubbling and oil in the radiator, but had no effect on loosing oil out the fill neck. Again there seems to be some oil in the radiator, but nothing terrible. My mechanic said, three of the four cylinders have a like new cylinder pressure and the fourth was not bad. The oil fill neck looks like it has a good baffle but I'm not sure what they should look like so, I can't tell you anymore than that. My oil fill cap is in terrible shape, I've ran over it at least three times and since straightened it with a hammer.

Also, can I recycle my old 10w30 car oil (used 3100 miles) through the tractor? How about 5w20? Thanks for any help.
Alan

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octave

04-24-2007 20:42:44

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Re: Loosing oil out of my fill neck in reply to Alan-Kansas, 04-23-2007 15:58:26

had a 641 would do the same thing.
problem was the wrong oil fill cap did not have a baffle in the cap ,replaced the oil fill cap with the correct one & my problem went away.

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Allthumbs

04-24-2007 04:59:18

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Re: Loosing oil out of my fill neck in reply to Alan-Kansas, 04-23-2007 15:58:26

The 8N I had for almost 30 years started blowing oil from the filler tube. Checked compression and it was almost nonexistent. For it's last year I always managed to start it but that was like an airline pilot making all the checks before a cross country flight. The N I have now uses oil, after what Dell and others have said about 20W50 oil, I think I will switch from HD30W.

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ZANE

04-23-2007 19:12:25

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Re: Loosing oil out of my fill neck in reply to Alan-Kansas, 04-23-2007 15:58:26

The engine needs rebuilding along with the oil pump. Nothing will blow oil out but worn out piston rings. That's a fact!

Don't even consider using used or new multigrade oil in that engine. It is not made in Japan!

Zane

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Bruce (VA)

04-23-2007 16:26:51

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Re: Loosing oil out of my fill neck in reply to Alan-Kansas, 04-23-2007 15:58:26

Drain the oil, replace it w/ 6 quarts of 30w HD oil. Get a new filler cap. Do not recycle burnt oil out of the car into the tractor. Replace the oil filter (NAPA 1010) Chances are the tractor does not have a thermostat in the upper hose. Check it out. If it does not have a thermostat, install one, preferably a 180* model. Then, get a compression gauge & check the compression yourself. There is a reason you have excessive blowby; the compression check will narrow down the possibilities. If you do not know how to do a compression check, just ask.

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alan-kansas

04-23-2007 17:11:43

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Re: Loosing oil out of my fill neck in reply to Bruce (VA), 04-23-2007 16:26:51

Thanks for the help. Is there a differnce between SAE30 and HD30? I"ve been putting Penzoil HD30 in, but last time I went cheep and picked up 5qts of Walmarts cheepest SAE30. The Walmart stuff seem a lot thicker, like chainsaw bar oil. The last 4qts I went back to the Penzoil HD30. As much oil as I"ve putting in the tractor would replacing the oil help? I don"t recall seeing a oil filter on the tractor, can you help me with that? I believe I can handle the compression check. Can you help me understand the correlation between the thermostat and the oil spilling. Is it possible the only problem is a defective oil filler cap. If a good running 8n didn"t have a filler cap would it loose oil like mine? Thanks again.
Alan

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Ross Pugh(NC)

04-24-2007 06:06:23

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Re: Loosing oil out of my fill neck in reply to alan-kansas, 04-23-2007 17:11:43

Sounds like ye need to get yeself a copy of the FO-4 Shop Manual if ye can't find the oil filter. It will have a picture of one in it and ye can locate yours. Anyone owning one of these N's needs to also own at least one copy of the FO-4 Shop Manual. Great bathroom reading.

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Bob

04-23-2007 16:02:24

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Re: Loosing oil out of my fill neck in reply to Alan-Kansas, 04-23-2007 15:58:26

Do you suppose the excessive blowby has anything to do with the oil being forced out????

Also, do you have the correct dipstick?

Why do you take the oil out of the car, if it's so darned good???

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Kansas-Alan

04-23-2007 16:35:01

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Re: Loosing oil out of my fill neck in reply to Bob, 04-23-2007 16:02:24

The white smoke coming out of the filler neck tells me there's excessive preasure in the crank case. The oil preasure dropping to 0 at the bottom of the hatch marks on the dip stick seem to indicate the dip stick is correct. I had my mechanic look at the dip stick, he seemed to think it look correct. As far as the motor oil goes, I try to change oil it at 3000 mile figuring I won't get around to it until 5000. In this case I was on top of it.

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uh . . . Dell (WA)

04-23-2007 20:00:31

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Re: Loosing oil out of my fill neck in reply to Kansas-Alan, 04-23-2007 16:35:01

Alan..... ..white smoke coming out the oil breather cap tells me yer 6-qts of engine oil is finally getting HOT enuff to evaporate natural combustion by-products like water. Most likely due to NO THERMOSTAT in upper radiator hose. Squeeze yer hoze when warmed up and you can actually feel it, but can't in COLD inflexible hoze.

But go ahead and do the dreaded compression test. Ford specs: 90psi min (dry). And while yer att-itt check the WET compression too. That will verify yer unfounded worn engine ring blowby theory. I wouldn't trust a 50yo 20% accurate oilpressure meter. $10, new (cheap)

Also check yer oilpan dipstick. Its supposed to be 12in long and caps are known to slip. Remember, its 6-qts with filter change. Ford sez to change tractor engine oil at least every fall or every 100-hrs, and yer gonna be really tractoring to put 3000miles on innna year..... ..respectfully Dell, the skeptical

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Alan-Kansas

04-24-2007 06:00:54

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Re: Loosing oil out of my fill neck in reply to uh . . . Dell (WA), 04-23-2007 20:00:31

What is a "wet" compression check and a "dry" compression check?

Thanks Allthumbs, Zane, Bruce, Bob, Dell for all the help.
Alan

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Dell (WA)

04-24-2007 08:15:12

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Re: Loosing oil out of my fill neck in reply to Alan-Kansas, 04-24-2007 06:00:54

Alan..... ..a "wet compression" is when you squirt about 1-oz of engine oil down the sparkie hole to seal the worn rings. This will cause compression to increase versa the "dry" compression reading. (you are supposed to be writing all these compression numbers down for later reference) The amount of "increase" is a indication of piston ring wear. When you re-start yer oiled engine, you'll SMOG all the skeeters for 5-mins. It should be intuitively obvious, take your "dry" reading first.

Remember, Ford specs: 90psi minimum (dry). Compression gauge $20-50; a necessity for old tractor evaluation. Take at least 5-puffs to fully fill yer compression gauge. For reference, my eazy starting 52-8N compression is +120psi; my 1969 BMW 2002 compression is +165psi, my Dodge Diesel is +220psi..... ..Dell

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Ross Pugh(NC)

04-24-2007 06:12:58

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Re: Loosing oil out of my fill neck in reply to Alan-Kansas, 04-24-2007 06:00:54

Get the FO-4 Shop Manual and it will explain the procedure fer the dry and the wet test and the interpretation of ye readings. An invaluable manual.

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A. Bohemian

04-23-2007 17:47:52

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If I Am Reading Your Posts Correctly... in reply to Kansas-Alan, 04-23-2007 16:35:01

(1) Blown gasket (which has been replaced, but probably resulted in extreme overheating at the time)
(2) Difference in compression between cylinders
(3) Zero PSI with oil at fill level
(4) So much blowby oil and white smoke are flying out the filler neck

I would STRONGLY suggest you stop running this engine under load, immediately. It's done.

You can and perhaps should do those compression checks; but you KNOW there is excessive blowby, and rings occasionally check better than they actually are. So, the test could give misleadingly encouraging results.

I think you need a rebuild. You might be able to put it off for some time, but if the difference in compression between cylinders is great enough, you run the risk of messing up the crank and/or block, which can greatly increase the cost of a rebuild.

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Bruce (VA)

04-23-2007 16:37:43

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Re: Loosing oil out of my fill neck in reply to Kansas-Alan, 04-23-2007 16:35:01

The test for the correct dipstick is compare it side by side w/ a N dipstick or just put 6 quarts of oil in the engine & see what the dipstick says.

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