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compresion on 8n ford tactor

Darn I wish I could remember ,but I'm thinking that 85-100 would be good.If you have a service manual or can borrow one it should be in there.
 
is that also the order you checked cylinders?
if so the progressively higher numbers could be from rings picking up oil the more engine was spun over...next time check comp in reverse order and see if numbers change.
 
bootser..........Ford specs fer 8N flathead engine is 90psi min. New engine is about 125psi. Most good engines run about 110psi. With low pressure you are quoting, ALWAYS run a dry (5-rumpas min) and then a WET. Squirt about 1-oz oil down the sparkie holes and then re-take yer compression readings. Good engines will up the wet compression about +10psi. Really BAD engines will up the compression +30psi. Many times low compression is "stuck" rings. Gitta can of MMO or ATF and squirt some down the sparkie holes ...then... wait a day. Do a dry compression test again. Remember, write all them compression numbers down (we all have CRS) Then iff'n you don't understand what yer compression numbers mean, post'um. Simple, eh?

BTW, new compression gauges have "instructions" and are NOT expensive. ($25, cheap) ........Dell
 
yes that is the order i checked had a blowen head gasket water in oil drained oil put in new oil changed gasket now want start was runing ok befor e head gasket was blowen
 
i hope you used thread sealer on head bolts...some of them pass thru water jackets in block...dont ask me how i learned about that.
 
got everything back together tractor running good but on left side at back between head and block water is bubbling out
 
got tractor runin but still have leak on head gasket left rear had head shaved tourqued bolts @70 psi bad head gasket maybe what do you think
 
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