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Thread: New guy with an oil pressure question!!!! HELP
          
   
   

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  1. #1
    JASONHOLLAND is offline CHR Member Visit my Photo Gallery
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    New guy with an oil pressure question!!!! HELP

     



    So I bought a truck that already had a built motor in it don't have alot of details on the build but it is a 454 when I took out for a spin oil pressure was great 50 PSI + so i load it up bring it home and putt around in it for the day and that night I decided I wanted to see how it launches so I took it up to the stall and launched it keeping an eye on the gauges the whole time and after I shut down I look at oil pressure and it's at ZERO so I shut down the truck and get out and look around well Teflon oil pressure line got on the header and melted shut no big deal put a new one on and been having low oil pressure and recently gauge will read ZERO running in a straight line but when you turn a corner it will shoot up to like 50 anybody have any ideas what would cause pressure to go up when turning (heard of it going down but not up?)

  2. #2
    jerry clayton's Avatar
    jerry clayton is offline CHR Member Visit my Photo Gallery
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    I always suggest going back to the last thing done---check out the oil pressure line routing

  3. #3
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    shine is offline CHR Member Visit my Photo Gallery
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    did you bleed the air out of the line ? like jerry said the problem started with the line .

  4. #4
    herbet99 is offline CHR Member Visit my Photo Gallery
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    I don't have a great suggestion but another easy thing to check is the ground for the sending unit.

  5. #5
    shine's Avatar
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    i thought it was a mechanical gauge .

  6. #6
    JASONHOLLAND is offline CHR Member Visit my Photo Gallery
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    I switched it to copper line so i could avoid the header problem with it again, still had the same problem realized that copper line is super easy to pinch so I just decided to go to an electrical sensor so now I have the pressure sensor directly plumbed in to the block with no risk of kinks and even the electrical gauge doing same thing! before i put it in I just cranked it over with no line or anything there and oil just gushed out just cranking didn't start it though.

  7. #7
    JASONHOLLAND is offline CHR Member Visit my Photo Gallery
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    it was originally a mechanical but now switched to electrical didn't state that until my last post though

  8. #8
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    Personally, I'd be pullin' the pan to have a look-see at the pickup and measuring pickup screen to bottom of pan clearance. Verify pickup tube is tight in pump, check torque on pump retainer bolt to main cap. When you put the pan back on, put 5 quarts of oil in the pan and mark the dipstick with the edge of a file.
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  9. #9
    JASONHOLLAND is offline CHR Member Visit my Photo Gallery
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    If pickup tube was not inserted properly when I open the port up where the sending unit taps in to oil would not be shooting out would it?

  10. #10
    JASONHOLLAND is offline CHR Member Visit my Photo Gallery
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    Oh and by the way to pull the pan I have to pull the whole motor out now! Isn't super difficult I know but inconvenient ecspecially to chase a ghost! lol

  11. #11
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    Quote Originally Posted by JASONHOLLAND View Post
    Oh and by the way to pull the pan I have to pull the whole motor out now! Isn't super difficult I know but inconvenient ecspecially to chase a ghost! lol
    If you drive it with low to no oil pressure very long then you just might be pulling motor anyhow.
    .
    " I'm drinking from my saucer, 'cause my cup is overflowed ! "

  12. #12
    JASONHOLLAND is offline CHR Member Visit my Photo Gallery
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    In testing stage right now looking for ideas what it might be if anyone had had something like this happen

  13. #13
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    Does it make any noise at idle, while indicating zero pressure? Did you buy a quality gauge & sender, and install it with new fittings, or verify no blockage in your fittings?

    Since you have to pull the engine to pull the pan, you might consider draining your oil, letting it drain totally, then re-fill with five quarts of new 10W30 and check your dipstick, before you start the engine to verify your "Full" mark. If you also change the filter, then refill to your verified "Full" mark on the dipstick and see what your pressure does? That's an easy step to ensure proper oil level.
    Roger
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  14. #14
    Dave Severson is offline CHR Member/Contributor Visit my Photo Gallery
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    I'd go with Roger's plan, good idea to know that the dipstick is correct for the pan on the engine, easiest way to do this is an oil change and verify the accuracy of the markings on the dipstick!!
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  15. #15
    JASONHOLLAND is offline CHR Member Visit my Photo Gallery
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    Well I bought the most expensive autometer gauge that they had like $70 the motor has a larger oil pan on it and actually holds just over 7 qts all new fittings did not check visually for blockage but when had everything off of it cranked it over and had oil shooting out figured that was a good indicator that their was no blockage but maybe not

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