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383 oil pooling on top of valley pan???? #2942602
07/13/21 11:49 AM
07/13/21 11:49 AM
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west palm beach, florida
modelmakerinc Offline OP
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Fellas, I got an odd circumstance and cant seem to understand how its possible. The 383 in my Volare (Sold two years back) is having oil "pool" on top of the valley pan. i understand pool as not just seeping but ounces of oil and not burnt or odd in color. it is a stock bottom end with 346 iron heads, an edelbrock RPM intake with the felpro valley pan and thin gaskets. how or where can oil get to the topside of the valley pan, the new owner say the intake was removed and reinstalled and has the same issue.

this seems beyond odd as the oil is splashed up on the bottom side of the pan and i cant think of anyway oil can get on top. any insites are appreciated. Thanks in Advance Henry


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Re: 383 oil pooling on top of valley pan???? [Re: modelmakerinc] #2942607
07/13/21 12:17 PM
07/13/21 12:17 PM
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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 shruggy
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 scope up


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 383 oil pooling on top of valley pan???? [Re: modelmakerinc] #2942624
07/13/21 12:46 PM
07/13/21 12:46 PM
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Milwaukee WI
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Inspect the valley pan for cracks.

08180987-A9DC-4459-9C4F-C67C2C93B5E8.jpeg

"use it 'till it breaks, replace as needed"
Re: 383 oil pooling on top of valley pan???? [Re: modelmakerinc] #2942626
07/13/21 12:48 PM
07/13/21 12:48 PM
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Anchorage, Alaska
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iagree Are they sealing the intake bolts also?


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Re: 383 oil pooling on top of valley pan???? [Re: modelmakerinc] #2942633
07/13/21 01:00 PM
07/13/21 01:00 PM
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Oregon
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That isn't uncommon on high mileage engines. I've seen oil on the valley plate a bunch of times over the years. It either leaks from the oil pressure sending unit, or the distributor, or the intake bolts or a crack in the valley pan itself. Shouldn't take more than a few minutes to figure where it is coming from. Just wipe everything clean and then watch it.

Re: 383 oil pooling on top of valley pan???? [Re: AndyF] #2942637
07/13/21 01:07 PM
07/13/21 01:07 PM
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west palm beach, florida
modelmakerinc Offline OP
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The front is clean and dry, cant be distributor, cant be the oil pressure sending unit, it's not front or rear rails.

I believe its oil wicking up through the threads of the intake bolts. The heads ports are clean and it runs great, does not have vacuum leak.

Too much crankcase pressure maybe or cracked valley pan

imagejpeg_0.jpgimagejpeg_1.jpg

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Re: 383 oil pooling on top of valley pan???? [Re: modelmakerinc] #2942642
07/13/21 01:20 PM
07/13/21 01:20 PM
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Anchorage, Alaska
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Originally Posted by modelmakerinc
...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
Re: 383 oil pooling on top of valley pan???? [Re: modelmakerinc] #2942645
07/13/21 01:22 PM
07/13/21 01:22 PM
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Sure looks cracked to me.

D6164EF9-DBB8-47C9-9412-9267F29275C7.jpeg

"use it 'till it breaks, replace as needed"
Re: 383 oil pooling on top of valley pan???? [Re: TRENDZ] #2942693
07/13/21 04:22 PM
07/13/21 04:22 PM
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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
Re: 383 oil pooling on top of valley pan???? [Re: an8sec70cuda] #2942702
07/13/21 05:13 PM
07/13/21 05:13 PM
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NE Ohio
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That much oil indicates the valley pan is cracked and blowing oil up through

Re: 383 oil pooling on top of valley pan???? [Re: DoubleD] #2942733
07/13/21 07:10 PM
07/13/21 07:10 PM
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Rogue River, OR
Jeremiah Online work
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Every time I've ever had that much oil on the Valley Pan it was cracked or rusted out.



Re: 383 oil pooling on top of valley pan???? [Re: an8sec70cuda] #2942741
07/13/21 07:35 PM
07/13/21 07:35 PM
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Bend,OR USA
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Originally Posted by an8sec70cuda
It can absolutely come through the threads of the intake bolts if they weren't installed w/ thread sealer.
How? confused


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 383 oil pooling on top of valley pan???? [Re: Cab_Burge] #2942931
07/14/21 08:17 AM
07/14/21 08:17 AM
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Marion, South Carolina [><]
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Originally Posted by Cab_Burge
Originally Posted by an8sec70cuda
It can absolutely come through the threads of the intake bolts if they weren't installed w/ thread sealer.
How? confused

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
Re: 383 oil pooling on top of valley pan???? [Re: an8sec70cuda] #2943000
07/14/21 11:18 AM
07/14/21 11:18 AM
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Bend,OR USA
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That had to be a hoop of crankcase pressure shock
I've not seen that as far as I can remember confused
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 puke That was back when NHRA only allowed OEM stock pistons whiney
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 whistling


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: 383 oil pooling on top of valley pan???? [Re: TRENDZ] #2943066
07/14/21 01:32 PM
07/14/21 01:32 PM
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north of coder
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Originally Posted by TRENDZ
Sure looks cracked to me.



i was thinking the same thing when i saw those pics.
beer

Re: 383 oil pooling on top of valley pan???? [Re: moparx] #2943095
07/14/21 02:19 PM
07/14/21 02:19 PM
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Super Spudsville
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Maybe needs more valve cover venting from the vid I seen of someone beating it a bit. shruggy


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Re: 383 oil pooling on top of valley pan???? [Re: Mr PotatoHead] #2944244
07/17/21 11:41 AM
07/17/21 11:41 AM
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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"
Re: 383 oil pooling on top of valley pan???? [Re: TRENDZ] #2944630
07/18/21 06:52 PM
07/18/21 06:52 PM
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west palm beach, florida
modelmakerinc Offline OP
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I will post when I know more.


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