Re: Engine sits for about a weekrated car and got oil pressure.
[Re: Sammy]
#2751860
03/14/20 02:20 PM
03/14/20 02:20 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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if you slow the drill speed down to as best you can match the "cranking" RPM on the intergear will it prime? I'm wondering if it is bleeding off somewhere from a leak or not priming in the first place, just thinking out loud. Post what it ends up being.
live every 24 hour block of time like it's your last day on earth
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Re: Engine sits for about a weekrated car and got oil pressure.
[Re: RapidRobert]
#2751863
03/14/20 02:33 PM
03/14/20 02:33 PM
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Joined: Dec 2012
Posts: 1,824 Wind Gap,Pa.
Sammy
OP
top fuel
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OP
top fuel
Joined: Dec 2012
Posts: 1,824
Wind Gap,Pa.
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if you slow the drill speed down to as best you can match the "cranking" RPM on the intergear will it prime? I'm wondering if it is bleeding off somewhere from a leak or not priming in the first place, just thinking out loud. Post what it ends up being. 6 seconds on the drill and it's got oil pressure.
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Re: Engine sits for about a weekrated car and got oil pressure.
[Re: Sammy]
#2751865
03/14/20 02:36 PM
03/14/20 02:36 PM
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Joined: Jun 2008
Posts: 3,916 usa
lewtot184
master
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master
Joined: Jun 2008
Posts: 3,916
usa
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Re: Engine sits for about a weekend and have no oil pressure.
[Re: Sammy]
#2751881
03/14/20 03:09 PM
03/14/20 03:09 PM
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Joined: Aug 2003
Posts: 43,315 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,315
Bend,OR USA
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It is loosing the seal between the pump and the block or somewhere else allowing the oil in the lines to drain down to the oil pan level. Look very closely at the O rings and oil line fittings and maybe even the lines to fix any problems with them Are you using the stock type oil pump gasket to the block? If so get rid of that That pump only needs the O rings on the pump body and snout to seal properly
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Engine sits for about a weekrated car and got oil pressure.
[Re: Sammy]
#2751891
03/14/20 03:27 PM
03/14/20 03:27 PM
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Joined: Jan 2003
Posts: 3,122 Auburn WA
Dave_J
master
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master
Joined: Jan 2003
Posts: 3,122
Auburn WA
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I've had 1 small block Melling pumps pressure by-pass piston stick open and have no pressure when cold. Also an old 2.2's pump did the same. Big block would be easy to check that piston.
Retired, US ARMY 1973-1994 ASE mechanic, Electrical 1994-1997 Retired GTE/VERIZON/FRONTIER 1997-2015
Posting cheap tech help (CRAP) here since Nov 97, 1000's of posts, some may be good.
03 Suzuki Burgman 650(Burger King) Scooter 65 Formula S Cuda 78 Little Red Express Truck 98 Buick Regal (wifes car)
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Re: Engine sits for about a weekend and have no oil pressure.
[Re: Cab_Burge]
#2751893
03/14/20 03:40 PM
03/14/20 03:40 PM
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Joined: Oct 2007
Posts: 4,213 New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,213
New York
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X2, a pin hole will break suction.
Boffin Emeritus
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Re: Engine sits for about a weekend and have no oil pressure.
[Re: AndyF]
#2751900
03/14/20 03:47 PM
03/14/20 03:47 PM
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Joined: Dec 2012
Posts: 1,824 Wind Gap,Pa.
Sammy
OP
top fuel
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OP
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Joined: Dec 2012
Posts: 1,824
Wind Gap,Pa.
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You have an internal air leak in the pickup system. Very common problem with the old Milodon dual external setup. It is less common problem with an internal pickup but can still happen. It's the new Milodon oil pump and cover setup.
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Re: Engine sits for about a weekend and have no oil pressure.
[Re: Sammy]
#2751913
03/14/20 04:20 PM
03/14/20 04:20 PM
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Joined: Jan 2003
Posts: 31,082 Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 31,082
Oregon
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You have an internal air leak in the pickup system. Very common problem with the old Milodon dual external setup. It is less common problem with an internal pickup but can still happen. It's the new Milodon oil pump and cover setup. If it has an external line then that is usually the problem. If it is all internal then you probably have an issue with the pickup tube. Maybe a small crack in the tube or the block is cracked in the threads or something like that. Internal problems are rare but problems with the external lines are very, very common. I stopped using the external line systems because they were such a hassle.
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Re: Engine sits for about a weekend and have no oil pressure.
[Re: Sammy]
#2751916
03/14/20 04:30 PM
03/14/20 04:30 PM
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Joined: Mar 2011
Posts: 3,105 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,105
Michigan
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And it loses prime. Can't get oil pressure started. Ran it for about 15 seconds and nothing. Had to put the priming shaft into the distributor hole and use the drill. Pressure came right up. Started right up with 72psi. 6 days later, same thing. This never happened before. What causes this to happen?And how do you fix it. Dual milodon oil lines. It's the new external Black oil pump. When did this all start ? You make no mention of that. Fresh engine build, or been on the road untouched for years or something in between?
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Re: Engine sits for about a weekend and have no oil pressure.
[Re: Sammy]
#2751921
03/14/20 04:39 PM
03/14/20 04:39 PM
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Joined: Feb 2004
Posts: 34,962 S.E. South Dakota !
bigdad
Still Posting A Lot
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Still Posting A Lot
Joined: Feb 2004
Posts: 34,962
S.E. South Dakota !
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read title ,said to myself ..bet its got "Dual milodon oil lines"
The lips of fools bring them strife, and their mouths invite a beating.Proverbs 18:6
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Re: Engine sits for about a weekrated car and got oil pressure.
[Re: MichaelF]
#2751924
03/14/20 04:48 PM
03/14/20 04:48 PM
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Joined: Mar 2006
Posts: 2,675 Mt. Eden Ky.
Hemi Allstate
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master
Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
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Did you loop the suction lines above the pump, so that there always is some oil trapped and can´t go back to the pan?
Michael Mark
1996 Ram 1500 Sport 1968 road runner 1952 Sears Allstate licensed, pump gas, Hemi 5.98 @ 115.73 1.33 60 ft. The best is yet to come. Painless Performance / Street RODDER magazine Top 100 for 2019
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Re: Engine sits for about a weekrated car and got oil pressure.
[Re: Hemi Allstate]
#2751931
03/14/20 05:15 PM
03/14/20 05:15 PM
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Joined: Jan 2005
Posts: 2,540 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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When you have an air leak into the pump, the “loop” makes the situation worse. You now have longer hoses filled with more air than you would with “normal” hoses. A siphon is a siphon. Stop the air leak and you will lose the siphon. I went through a season of this with my car. Never an external leak. I had the older cast 2 piece milodon pump. At seasons end, replaced the pump gearset, all the orings, resurfaced the pump cover, and had it hard anodized. (There were some minor radial scratches in the cover) Never found a clear failed part, but doing this stopped the issue. My suspicion has been that the pump clearances, along with cover scratches, allowed air from the outlet to leak into the inlet. Just my best guess.
"use it 'till it breaks, replace as needed"
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Re: Engine sits for about a weekend and have no oil pressure.
[Re: AndyF]
#2751935
03/14/20 05:28 PM
03/14/20 05:28 PM
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Joined: Dec 2012
Posts: 1,824 Wind Gap,Pa.
Sammy
OP
top fuel
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OP
top fuel
Joined: Dec 2012
Posts: 1,824
Wind Gap,Pa.
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You have an internal air leak in the pickup system. Very common problem with the old Milodon dual external setup. It is less common problem with an internal pickup but can still happen. It's the new Milodon oil pump and cover setup. If it has an external line then that is usually the problem. If it is all internal then you probably have an issue with the pickup tube. Maybe a small crack in the tube or the block is cracked in the threads or something like that. Internal problems are rare but problems with the external lines are very, very common. I stopped using the external line systems because they were such a hassle. Dual external -12AN lines
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