Losing Oil Pressure upon luanch, problem fixed HOW
#343406
06/10/09 05:53 PM
06/10/09 05:53 PM
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Joined: Mar 2008
Posts: 724 PA USA
flatiron
OP
super stock
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OP
super stock
Joined: Mar 2008
Posts: 724
PA USA
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I have a 431 and while Driving at 2500 rpm my oil pressure holds at 62lbs. When I luanch from a red light it drops to 0 Then comes back up after 20 seconds or so. I have a aftermarket gauge and I noticed some air bubbles in the line could it be this or should I be looking at something else?
Last edited by flatiron; 06/12/09 10:52 PM.
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Re: Losing Oil Pressure upon luanch
[Re: flatiron]
#343407
06/10/09 05:55 PM
06/10/09 05:55 PM
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Joined: Jan 2003
Posts: 25,200 Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,200
Upper Midwest
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Do you have baffles in the oil pan and a windage tray?? How far off the floor of the pan is your sump and do you have a deep oan??
Clean it, if it's Dirty. Oil it, if it Squeaks.
But: Don't fix it, if it Works!
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Re: Losing Oil Pressure upon luanch
[Re: flatiron]
#343410
06/10/09 06:15 PM
06/10/09 06:15 PM
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Joined: Jan 2007
Posts: 1,668 Mi,U.S.A.
mike s
top fuel
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top fuel
Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
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I agree with the other posts, you are uncovering the pick up screen.Baffles and a tray are mandatory.One more item to check is the pick up tube itself. It must be tight (and sealed) in the block and without any cracks.A few of those uncoverings could be very costly.Needs to be repaired asap.
Leave the gun.......take the Cannoli's....Mike
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Re: Losing Oil Pressure upon luanch
[Re: mike s]
#343414
06/10/09 06:48 PM
06/10/09 06:48 PM
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Joined: Jul 2008
Posts: 30,454 Florida STAYcation
dOoC
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,454
Florida STAYcation
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Quote:
Quote:
A tray ? ...is way WAY toooo high to control oil movement. It was designed for and is only good to get the oil AWAY from the rotating assembly.
You need baffles and "doors" to keep the oil in the area of the PU tube opening.
Windage not movement.Normal street pan can not keep the oil far enough away from the crank.Windage can add to the problem.
I am not following what you are saying.
I would AGREE that windage is an issue ... but not HERE ... with the OP's problem.
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Re: Losing Oil Pressure upon luanch
[Re: dOoC]
#343416
06/10/09 07:22 PM
06/10/09 07:22 PM
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Joined: Jan 2007
Posts: 1,668 Mi,U.S.A.
mike s
top fuel
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top fuel
Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
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I addressed the problem.These issues shouldn't be a problem.Everything I mentioned should be a part of any performance build.I was speaking in the builds' totality. Moroso and Milodon (and others)have nice 7 inch deep pans that fits early and late chassis.At the least any serious perfromance build should have a Street Hemi pan (6qts)if you are going to hammer the combo IMO. Stop yelling if someone would have informed the writer during the build he would not have the problem he does IMO
Leave the gun.......take the Cannoli's....Mike
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Re: Losing Oil Pressure upon luanch
[Re: flatiron]
#343417
06/10/09 07:25 PM
06/10/09 07:25 PM
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Joined: Jan 2007
Posts: 1,668 Mi,U.S.A.
mike s
top fuel
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top fuel
Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
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Yes,a bit of work but not too bad. Easier if you drop the centerlink and lift the engine slightly.
There are no stupid questions on Moparts. We all can learn something here.
Last edited by mike s; 06/10/09 07:26 PM.
Leave the gun.......take the Cannoli's....Mike
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Re: Losing Oil Pressure upon luanch
[Re: flatiron]
#343420
06/10/09 08:17 PM
06/10/09 08:17 PM
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Joined: Jul 2008
Posts: 30,454 Florida STAYcation
dOoC
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,454
Florida STAYcation
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Quote:
I have a 431 and while Driving at 2500 rpm my oil pressure holds at 62lbs. When I luanch from a red light it drops to 0 Then comes back up after 20 seconds or so.
Your first priority should be getting a good HP oil pan.
And when you R&R the old pan ... I would check a couple of bearings. Letting a motor run(especially under WOT) and having to wait for the oil-pressure to come-back to normal COULD NOT have done the bearings any good.
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