Oil Pressure Drops

dej(Jed) · May 6, 2014

I am looking at an IH 200 with what appears to be an oil pressure/bearing issue. When it first starts the oil pressure is high, but after about an hr it falls off to the high side of the red zone on a standard IH gauge. It doesn"t smoke and there
are no engine noises. The pressure never goes below the red line zone after that. The gauge has been replaced. Any ideas?

Allan in NE · May 6, 2014

Drop the pan and put a set of inserts in 'er.

Allan

teddy52food · May 6, 2014

And check the plate on the oil pump. Any grooves should be sanded out on a flat surface.

John A. · May 6, 2014

dej(Jed), I agree with Allan, A set of Rods & Mains should tighten it up a bunch, give the old girl better and more consistent Oil Pressure. For the least amount of Work! Hope this helps
Later,
John A.

gab · May 6, 2014

Oil pump end plate distorted/ gasket blown.

Anonymous-0 · May 6, 2014

FWIW, I have a Super C with a warped end cover on the oil pump, acts just like yours. Mine probably has 200 hrs. on the bearings.

Anonymous-0 · May 6, 2014

My H had the same problem til I discovered that someone had put in standard rod bearings for a .020 undersize crankshaft.

Russ from MN · May 6, 2014

I had the same problem with a C, Jim Nicholson suggested oil pump cover gasket and he was spot on! Cost me all of about $6 to fix it, been good ever since.

David G · May 6, 2014

I would check the oil pump first, much easier fix and cheaper.

Wayne in MN · May 6, 2014

Older engines especially do not need much oil pressure; what is more critical is the volume of oil supplied.
My Super C has about 5+# of pressure idling when warm and has been that way for years. Too busy (lazy?) to drop the pan & inspect.

John G. Hasler · May 6, 2014

> Older engines especially do not need much oil
> pressure; what is more critical is the volume of
> oil supplied.

Hydrostatic bearings don"t work without sufficient pressure. Also, at 5psi most of the oil is probably going out through the first bearing it gets to, leaving very little for the others.

Oil Pressure Drops

dej(Jed)

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Allan in NE

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teddy52food

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John A.

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gab

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Anonymous-0

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Anonymous-0

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Russ from MN

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David G

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Wayne in MN

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John G. Hasler

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