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8N oil in radiator

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Raincloud

09-18-2005 14:29:16




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I have an early 8N, that is blowing oil out of the radiator. I have not noticed antifreeze in the crankcase. It has been smoking and using oil lately ( two qts. to a tank of gas.), but it still runs good and use it to mow about 20 acres, twice a month.
I am planning to overhaul it this winter, but am worried the block may be damaged. I have had to replace the head gasket before and suspect the head is slightly warped. I have never rebuilt an engine with sleeves. How does one get them out?
Any help would be appreciated.

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Dell (WA)

09-18-2005 22:37:45




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 Re: 8N oil in radiator in reply to Raincloud, 09-18-2005 14:29:16  
Rainey..... ....did you remember to "re-torque" yer cylinderhead after you ran yer new headgasket for about 1/2 hr? Iff'n not, RE-TORQUE NOW. 55ft/lbs for studnutts ...or... 70ft/lbs for headbolts. (warm engine) infact re-torque NOW ennyways, won't hurt nuttin. It might re-seal yer slightly warped flat-head. Oil in radiator is generally a sign of combustion gasses forcing their way past loose headgaskett.

Howsomevers; burning 2-qts of oil per tank of gas is bound to keep the neighborhood skeeters population down. And a sign you need to rebuild yer engine.

You should do the dreaded "compression test"; Ford specs: 90psi min (dry) before you start yer teardown and overhaul..... ..Dell

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jwm

09-18-2005 17:45:58




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 Re: 8N oil in radiator in reply to Raincloud, 09-18-2005 14:29:16  
If "blowing oil out the radiator" means you see a film of oil on top of the water, this is more or less normal. It is a by product of the internal combustion engine. Really having "oil" in the radiator could only mean a cracked block. I doubt that's your problem since you say it works pretty good. Two quarts of oil to a tank of gas isn't real good but it's not real bad either. They make special tools to replace the sleeves. Look up sleeve replacement in the archives of this forum and see the ways other people do it. Best wishes, James

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Raincloud

09-19-2005 10:17:27




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 Re: 8N oil in radiator in reply to jwm, 09-18-2005 17:45:58  
Thanks for the reply James. There is a considerable amount of oil in the radiator and is spewing out onto the hood ( my radiator cap does not seal well due to getting it hung up on a low limb while mowing the orchard). I read Dell's post and am hopeing he is correct about the head gasket. The oil seems to be under pressure, the spews more the harder and faster the engine runs, but I guess that could be due to increased coolant circulation. Would a machine shop be able to magnaflux the block and tell me if it was cracked? I would hate to buy an overhaul kit and then discover the block needs replaced. I have checked the price of a rebuilt shortblock and (in my opinion) it is out of sight. I will check the archives again about sleeve replacement. I looked and didn't find anthing, but will look again. Thanks!

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