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Subject: oil pressure

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RJM528N    Posted 03-31-2021 at 14:46:00 [URL] [DELETE]        [Reply] [Email]  
  • oil pressure
  • I realized I didn't give much detail in my previous post. I had a complete engine rebuild on my '52 8n with side distributor. This is what he did: New pistons, sleeves, rings, main bearings, rod bearings, oil pump housing/rebuild kit; crankshaft reground, head planed/ground. Also a new oil gauge. He brought the assembled, running tractor back to me. I started and ran it several times but never for a really long time; nor did I work it hard. I noticed on start-up that the oil gauge needle hesitated for a split second then snapped to 40-50 lbs. After setting for a few days it stayed at zero a few seconds before snapping over. Then after setting for a week it doesn't move at all. Since all internal parts are new is align boring/honing still an issue? Just want some opinions and advice before I call him. Thanks. Russ

    Steve Dabrowski    Posted 03-31-2021 at 16:17:10 [URL] [DELETE]        [Reply] [No Email]  
  • Re: oil pressure
  • Check with the guy about what he actually did! If he align bored it with a new bearing cap assembly then you may just have a small problem like a clogged oil line to the gage, or the gage's input is clogged from some small debris. But until you know for certain what he did there is no clear solution to the problem and you will just spin your wheels figuratively.

    TheOldHokie    Posted 03-31-2021 at 15:19:39 [URL] [DELETE]        [Reply] [No Email]  
  • Re: oil pressure
  • Anytime you replace a main bearing cap align boring or honing is necessary. The manfacturing process used by the factory makes that a hard and fast rule, The factory assembles the roughly machined caps and block and then bores them as a unit. That makes them a uniquely matched set that cannot be duplicated in a replacement part new or otherwise.


    Bruce(VA)    Posted 03-31-2021 at 15:14:47 [URL] [DELETE]        [Reply] [Email]  
  • Re: oil pressure
  • You said earlier:

    " Anyway the guy replaced the oil pump instead of rebuilding the old one. "

    Did he REBUILD the pump or did he REPLACE the pump?

    Do you understand the difference?

    Because if he replaced it, it needed to be align bored because the main bearing cap is the pump housing. Was it align bored ?

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