Ford 8N high oil pressure

   / Ford 8N high oil pressure #1  

williamhutchinson44

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Dec 30, 2021
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Ford 5000
The other day my 52 side mount 8n oil pressure dropped down and I changed the oil, it was time anyway. It was down low, but still running fine. I changed the oil, replaced the filter, and now the pressure is pegged out at 80. I haven't ran it except to move it out of my way real quick. I've tried reading through some older forums and a lot of people say to just run it but I'm concerned with the sudden spike. Also a drop of oil seems to squeeze through the filter canister if I run it for a minute. I'm not sure if this is from the excessive oil pressure or the seal. Any ideas?
I just run out and test it does drop to about 58 at low idle.
 
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   / Ford 8N high oil pressure #2  

TractorTech

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I wouldn't run it either as it will develop leaks such as the filter housing. You could try removing the filter and try that. Otherwise, there is something lodged in a passage or on the relief.
 
   / Ford 8N high oil pressure #3  

John0829

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I would take another known good gauge and test the pressure.
 
   / Ford 8N high oil pressure #4  

Roadworthy

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Are you sure you used the correct viscosity of oil? Given the age of the tractor and the fact it's probably a gasoline engine 30 is probably the proper weight. If that's correct, I agree with John - put a known good oil pressure gauge on it. If that reads high, too, your oil pressure relief valve is not doing its job.
 
   / Ford 8N high oil pressure
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williamhutchinson44

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Dec 30, 2021
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Are you sure you used the correct viscosity of oil? Given the age of the tractor and the fact it's probably a gasoline engine 30 is probably the proper weight. If that's correct, I agree with John - put a known good oil pressure gauge on it. If that reads high, too, your oil pressure relief valve is not doing its job.
I ordered a whole new set of gauges I was missing a tach anyway. Gonna swap them out and see what it reads. They should be in tomorrow night.
 
 
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