How to increase oil pressure.

abane · Jul 24, 2018

Is there any way to increase oil pressure without an engine overhaul.?

kevinj54 · Jul 24, 2018

(quoted from post at 10:32:29 07/24/18) Is there any way to increase oil pressure without an engine overhaul.?

On what??

abane · Jul 24, 2018

9n Ford tractor

old · Jul 24, 2018

Maybe but what type of pressure do you have now. Not uncommon for a 9N to have around 5-10 PSI when hot. They never where high pressure systems. One can replace the pressure relief spring with a new one which may help or it may not depending on if the old one is weak

Pitch · Jul 24, 2018

How much does yours have? Best I,ve ever seen is about 20#

sotxbill · Jul 24, 2018

pull pan and spin in new inserts and mains, replace oil pump. However you can not usually get to the top mains/thrust bearings to spin out.

This is a nominal way, but your dancing with the devil... if one of the mains is about to let go.

Billy Shafer · Jul 24, 2018

Also depends on what shape the engine is in.

W_B · Jul 24, 2018

Drop the pan and check that the pickup tube isn't sucking air. If not you'll have to replace or rebuild the oil pump. You might have to take off the front axle to drop the pan, I got lucky and didn't on mine, but that is the standard procedure. As I recall the pump sits on the front side of the engine and mounts as one of the crank bearings (a one piece unit, along with the pickup tube). Supposedly you need to line bore the crank bearings for the engine if you replace the whole unit, so you'd be better to just rebuild it. I didn't when I replaced it with a Ford OEM unit back in about 1994 or so and haven't had any issues with it (sometimes you get lucky). The wear on the rod and crank bearings have some effect on pressure too so it they are bad you'll probably still have lower pressure. Don't expect very high pressure, if you get 20 - 30 when hot you are OK (I had zero before replacement!).

Go to the Ford 9N,2N,8N forum here on YT for advise on a rebuild.

DMartin9N-2N · Jul 24, 2018

Hi, Sotxbill:
How can you pull the pan on a 9N? It looks to me like the pan is holding the front and back of the machine together. Is there a practical way to remove the pan without splitting the tractor?

Dennis M. in W. Tenn.

ss55 · Jul 24, 2018

Heavier weight oil might help a bit. Rebuilt oil pump too, check if existing oil pump is still within specifications.

Often when all the bearings in the bottom end of an engine need replacement, the camshaft bearings, rings, sleeves and valves in the top end are ready for replacement too.

Steve@Advance · Jul 24, 2018

Everything has about been covered. Something easy to check, be sure the oil is not contaminated with gas. That can happen gradually if running rich, or it can flood the engine if the fuel valve is left on when stored.

Like said, those don't need much oil pressure. Being a flat head, there is no need for high pressure, no rocker arms to oil.

If you can get any pressure at all at warm idle, and the pressure will come up to 10-15 revved up, and there are no new noises, like deep knocking under load or rattles when coasting down, it will go a long time.

Gradual pressure loss is normal for a well worn engine. But sudden loss, or total loss, or fluctuating pressure, is a sign that something has changed.

One thing that will not increase idle pressure is stretching, shimming, or putting a stronger spring in the relief valve. As long as the relief valve is seating fully, it only effects high speed oil pressure.

oldsarge · Jul 24, 2018

Stretch the spring a little...Done to mine 30 years ago..Got 50# before it fires,and 30# when it's really hot....15/40

old · Jul 24, 2018

Dropping the oil pan on an N series Ford is not easy and yes you have to split the tractor to do so

grizz02 · Jul 24, 2018

used to put a couple small washers added to the bypass spring in the pump a little goes a long way

37chief · Jul 24, 2018

Might try another pressure gauge. Low oil pressure is better than no oil pressure. Stan

daisyman · Jul 24, 2018

Had an ornery mechanic friend tell a fella who asked that a long time ago, "I don't know about anyone else, but I just use oversize oil." , and said it with an absolutely straight face!!! :lol: :lol:

Bruce from Can. · Jul 24, 2018

I can remember some of the junk cars we had as kids, none of these cars had anymore value than scrap. And you knew you would only drive them for a year or less. Most of them had oil lights that would come on at every stop sign once the motor was warm. I would dump a can of STP oil treatment into the engine, didn?t fix anything, just made the oil a bit thicker, and the idiot light wouldn?t come on all the time. We drove these old cars hard, and never had a engine fail

abane · Jul 24, 2018

When the engine is cold the oil pressure is 20 and hot it?s 7-10

abane · Jul 24, 2018

9n Ford tractor

old · Jul 24, 2018

For an N series that is not all that bad. One can use something like a 20W-50 oil which may help. I run 20W-50 in all but 2 of my machines. Reason I do not use it in all is one is a 1935 JD-B that uses a lot of oil so I run a 60W oil in it an the other is a diesel so I run Rotella in it

guido · Jul 24, 2018

Hello Abane,

A heavier weight oil might help. But you seem to have what is NORMAL for your engine, as others have stated. If you need to impress a prospective buyer 50w straight oil would certainly boost the pressure!,

Guido.

Crazy Horse · Jul 24, 2018

Some of the old gauges can be carefully pried apart and put back together ...... so when one is apart, just bend the needle a bit clockwise, instant increased oil pressure.

How to increase oil pressure.

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