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Subject: no oil pressure

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Jean-Pierre    Posted 09-06-2017 at 21:27:45 [URL] [DELETE]        [Reply] [Email]  
  • no oil pressure
  • A year ago, i bought a 1946 Ford 2n. When the weather was cold, (Under 30 degree) the oïl pressure would'n't go up. When it got warmer, the pressure would go up right away. (aroud 30 psi). Now, evenat around 60 degrees, the pressure doesn't build up. Any ideas?

    Farmer Brown    Posted 09-08-2017 at 05:06:55 [URL] [DELETE]        [Reply] [No Email]  
  • Re: no oil pressure
  • Don't condemn the engine till you check the pressure with a new gauge. As suggested, don't guess with parts but a gauge is cheap and suggesting an engine as worn out without verifying oil pressure is guessing to me.

    Rustyal    Posted 09-07-2017 at 20:28:48 [URL] [DELETE]        [Reply] [No Email]  
  • Re: no oil pressure
  • You checked the oil level?

    steveVa    Posted 09-07-2017 at 15:44:20 [URL] [DELETE]        [Reply] [No Email]  
  • Re: no oil pressure
  • I have a spare basic oil pressure gauge that I bought years ago that has a dozen brass adapter fittings that fit about anything you can find. If you can find one at walmart or local parts store, I would hook it up at the engine block and see if you have pressure. Otherwise your oil drop tube may have cracked and you will toast your bearings if you keep running it.
    Then while you have the old oil tube loose take loose the other end at the gauge and blow out the old line and see what crud comes out of it.
    Be careful taking the nut loose at the gauge as you can easily break the brass nut or split the nipple to the gauge.
    Once you blow out the line and you also find you have pressure on the new spare gauge, you may try hooking the old gauge back up and see if it works with the line blown out.
    It did on my 52 8n when I had the same issue.

    TheOldHokie    Posted 09-07-2017 at 09:38:33 [URL] [DELETE]        [Reply] [No Email]  
  • Re: no oil pressure
  • An engine without oil pressure is vulnerable to damage if you run it. I'd start diagnostics with that possibilty in mind. Disconnect the line at the junction on the back of the engine and connect a mechanics oil pressure gauge. That will tell you what is happening inside the engine. If you get oil pressure on the test gauge the problem is in the line and/or dash gauge. No oil pressure on the test gauge tells you the engine has a problem and you should immediately cease running it until that problem has been corrected.


    K.LaRue-VA    Posted 09-07-2017 at 09:10:37 [URL] [DELETE]        [Reply] [No Email]  
  • Re: no oil pressure
  • The gauge line is a dead end, so any moisture that gets in there, stays in there. The original problem, no reading when cold seems like ice blocking the line. Once moisture gets in there, corrosion and deposits become a problem. These gauges are not very good to begin with, add corrosion and blockage, and they quickly become useless. As others have written, blow out the line, replace the gauge with a decent quality replacement, and at least the pressure readings from the gauge will be more trustworthy.

    Tim Daley(MI)    Posted 09-07-2017 at 06:42:09 [URL] [DELETE]        [Reply] [No Email]  
  • Re: no oil pressure
  • You could just have an old worn out engine and it's time for a rebuild. Oil pressure at idle should be around 35 PSI when first starting up regardless of outside temperature. If the engine is worn, oil pressure will slowly decrease at idle when warmed up/hot. If it gets down under 10 PSI, that is a good sign it is a worn engine. You can do a compression check to verify condition of engine too. I do not suspect a faulty gauge, guessing and replacing parts that may not be needed should be avoided until you know for sure what to buy.

    Tim Daley(MI)

    Farmer Brown    Posted 09-07-2017 at 05:28:41 [URL] [DELETE]        [Reply] [No Email]  
  • Re: no oil pressure
  • That's opposite of what I would expect. I believe your gauge is hanging up and I would flush out the line and replace the gauge.

    clayton ingmire    Posted 09-06-2017 at 22:09:43 [URL] [DELETE]        [Reply] [Email]  
  • Re: no oil pressure
  • if it has not seized up by now it has oil pressure change out the gauge make sure tube from engine is clear

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