Compression Test

I bought this '51 8n several months ago and just started to tear it down for restoration. I bought it as a non-running tractor. I put points and plugs in it and started it up. It smokes quite a lot. Has oil in the radiator. I'm talking about heavy oil like you get when you drain your crankcase. It is not an oily film like you might think. The oil pressure on a new oil gauge is 45 cold and 35 hot. There is no water in the crankcase.

I did a compression test today and here are the results: Dry; All within a couple of pounds of 100. Wet; 1/110, 2/130, 3/120, 4/180. I then did a 3rd test. 1/110, 2/110, 3/110, 4/120.

What do you make of this? Could it be just a blown head gasket?

It is an original 6 volt with a hi-lo transmission.

I appreciate your help.

What do you make of this? Could it be just a blown head gasket?..... ...NO, NOT a blown head-gasket.

Ford 8N compression specification is: 90psi min (dry) yer claimin' 100psi. Yer 3rd test is typical of good condition engine. Yer 4/180 is yer fault; you probably OVERFILLED yer sparkie hole with engine oil for the "wet-test".

You write..... .."Has oil in the radiator. I'm talking about heavy oil like you get when you drain your crankcase. It is not an oily film like you might think."..... ..in the days of long-timeago, anti-freeze and plain radiator water needed "waterpump lubricant" added. Modern anti-freeze has waterpump lube already added. Water-pump lube does NOT DRAIN out of the engine water passages.

Recommend you do a thourgh radiator flush with chemicals. (go shopping and read lables) Re-fill with 50/50 anti-freeze (of your choice) and after a thourgh engine warm-up and cool down, re-inspect yer radiator water for yer floating oil..... ....Dell

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