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10-30-2012 09:01 AM #1
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?)
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10-30-2012 09:12 AM #2
I always suggest going back to the last thing done---check out the oil pressure line routing
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10-30-2012 09:35 AM #3
did you bleed the air out of the line ? like jerry said the problem started with the line .
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10-30-2012 10:41 AM #4
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.
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10-30-2012 10:10 AM #5
I don't have a great suggestion but another easy thing to check is the ground for the sending unit.
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10-30-2012 10:17 AM #6
i thought it was a mechanical gauge .
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10-30-2012 10:42 AM #7
it was originally a mechanical but now switched to electrical didn't state that until my last post though
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10-30-2012 11:18 AM #8
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.PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.
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10-30-2012 12:56 PM #9
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?
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10-30-2012 01:01 PM #10
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
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10-30-2012 01:45 PM #11
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 ! "
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10-30-2012 02:00 PM #12
In testing stage right now looking for ideas what it might be if anyone had had something like this happen
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10-30-2012 02:51 PM #13
My quesiton would be the same as Techinspector's-whose Pan and Pickup do you have on your 454? Did you verify Pickup depth? What is your clearance on the Mains and Rods? Oil control is often overlooked by many, and it is something to keep you eye on-btw, good for you to watch it, as it's easy to get caught up in the moment when you have the pedal down!
My engine builder had this same type of problem (which is why I went to an Engine Builder in the first place-experience matters!)-I originally bought a nice Moroso kick-out Pan and Pickup, but it wouldn't fit with my Headers (anybody need a new Pan/Pickup for a 502? )-anyway, I finally found a B&B Pan that would fit (it was a Steel one btw-I don't like Aluminum Pans on the street with my old feeble eyes) and when he got the Pan he modified it-you can see from the pictures that while the Pan originally came with baffles and a trap door that it would not control the slosh, and he also changed the pickup-it worked, and with a Melling select Pump it pulled 60+ psi from 4000-6400 rpm-
(I hope these pictures don't come out too big!)Last edited by 35WINDOW; 10-30-2012 at 03:01 PM.
Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?
-George Carlin
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10-30-2012 02:07 PM #14
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
Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.
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10-30-2012 02:33 PM #15
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!!Yesterday is history, tomorrow is a mystery, Live for Today!
Carroll Shelby
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