Re: 383 oil pooling on top of valley pan????
[Re: modelmakerinc]
#2942607
07/13/21 11:17 AM
07/13/21 11:17 AM
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Joined: Aug 2003
Posts: 42,463 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 42,463
Bend,OR USA
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I've seen this before, the oil is splashing, seeping, leaking out of the valley pan on the bottom side of the pan and heads, it is not sealing properly. I would try thicker gaskets to seal it better. If that doesn't work you may need to have the intake surfaces corrected to match the angle of the heads. I've seen many aluminum intakes needing that  I found that out fighting the same thing but mine was sucking the oil into the intake ports, I remove the pan and cleaned up the heads and intake mating surfaces and set the intake on the heads and used feeler gauges to see how much gap was on all four corners at the top and bottom, it was easily measurable so I wrote them down and took it to a good machine shop and they fixed it by surfacing the intake 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 383 oil pooling on top of valley pan????
[Re: modelmakerinc]
#2942624
07/13/21 11:46 AM
07/13/21 11:46 AM
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Joined: Jan 2005
Posts: 2,539 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,539
Milwaukee WI
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Inspect the valley pan for cracks.
"use it 'till it breaks, replace as needed"
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Re: 383 oil pooling on top of valley pan????
[Re: modelmakerinc]
#2942642
07/13/21 12:20 PM
07/13/21 12:20 PM
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Joined: Oct 2005
Posts: 237 Anchorage, Alaska
metallicareload
enthusiast
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enthusiast
Joined: Oct 2005
Posts: 237
Anchorage, Alaska
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...Too much crankcase pressure maybe or cracked valley pan Absolutely! It almost looks like the pan is bulged up a little, based on the shape of the puddle of oil towards the middle
440, 4-Speed, 3.54 1968, when Dinosaurs ruled the Earth
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Re: 383 oil pooling on top of valley pan????
[Re: modelmakerinc]
#2942645
07/13/21 12:22 PM
07/13/21 12:22 PM
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Joined: Jan 2005
Posts: 2,539 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,539
Milwaukee WI
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Sure looks cracked to me.
"use it 'till it breaks, replace as needed"
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Re: 383 oil pooling on top of valley pan????
[Re: TRENDZ]
#2942693
07/13/21 03:22 PM
07/13/21 03:22 PM
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Joined: Jan 2003
Posts: 13,226 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,226
Marion, South Carolina [><]
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It can absolutely come through the threads of the intake bolts if they weren't installed w/ thread sealer.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: 383 oil pooling on top of valley pan????
[Re: DoubleD]
#2942733
07/13/21 06:10 PM
07/13/21 06:10 PM
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Joined: Mar 2003
Posts: 9,074 Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,074
Rogue River, OR
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Every time I've ever had that much oil on the Valley Pan it was cracked or rusted out.
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Re: 383 oil pooling on top of valley pan????
[Re: an8sec70cuda]
#2942741
07/13/21 06:35 PM
07/13/21 06:35 PM
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Joined: Aug 2003
Posts: 42,463 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 42,463
Bend,OR USA
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It can absolutely come through the threads of the intake bolts if they weren't installed w/ thread sealer. How? 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 383 oil pooling on top of valley pan????
[Re: Cab_Burge]
#2942931
07/14/21 07:17 AM
07/14/21 07:17 AM
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Joined: Jan 2003
Posts: 13,226 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,226
Marion, South Carolina [><]
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It can absolutely come through the threads of the intake bolts if they weren't installed w/ thread sealer. How? Crankcase pressure causes it to wick up through the threads. Had it happen to me years ago. Thread sealer on the bolts stopped it.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: 383 oil pooling on top of valley pan????
[Re: an8sec70cuda]
#2943000
07/14/21 10:18 AM
07/14/21 10:18 AM
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Joined: Aug 2003
Posts: 42,463 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 42,463
Bend,OR USA
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That had to be a hoop of crankcase pressure  I've not seen that as far as I can remember  My old 415 HP 1963 M.W. Stocker would blow one or both breather caps off in the burn out with 42,000 miles on the original pistons, the top ring groove had over .011 thousands side clearances  That was back when NHRA only allowed OEM stock pistons  I should have had those pistons cut wider on the top ring and used a spacer to tighten up those clearances, hind sight is wonderful, isn't it 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 383 oil pooling on top of valley pan????
[Re: Mr PotatoHead]
#2944244
07/17/21 10:41 AM
07/17/21 10:41 AM
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Joined: Jan 2005
Posts: 2,539 Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,539
Milwaukee WI
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Absolutely needs a better crank case ventilation system, and likely a ring job.
So.... what was the verdict in this?
"use it 'till it breaks, replace as needed"
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