Oil Leak issue 5.7 intake manifold - Maybe?

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c713

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Good day to all. I'm new here and glad I found this site.
So a bit about me - I have been in the auto business (family used car lot) since 1983.
Not much has got by me that we haven't been able to figure out but about a year ago I bought a 2016 Ram 1500 Tradesman Short Box 4x4 regular cab with a noisy 5.7.
Most of the noise was the exhaust manifold on the passenger side but we put it in the shop. Removed intake, exhaust manifolds and heads, camshaft and lifters. A couple of the lifters were bad so we did just put in a stock cam and lifters. Had the heads professionally done, all the valves, seats, guides, planed the heads, all new gaskets, new bolts for the exhaust manifolds. Everything went great. Drove it a few months and then noticed a pretty bad oil leak (I will post photos) coming from the passenger side leaking down the back of the engine and pooling on the floor.
Not much that the oil went down a lot but a mess for sure. Now there are no engine lights are on, the truck does not lack performance, starts and runs fine. No issues with driveability but you will see the leak, and I can't figure it out. Took it to a friend that has a shop and he indicated to me that it's coming from the seam of the intake (I believe these are 3 piece intakes pressed together). So I took his advise, found a used intake from an 18, new set of felpro intake gaskets. Installed the intake from the 18 and drove it maybe 5kms maybe not even. Got home and I could smell the oil. Opened the hood, took a look and yep. Seems to be in the same place but a heck of a lot worse. So installed an oil catch can, vented the breather with a K&N filter and still the same. Now just to clarify, there's no issues with start up, performance, no engine lights but this external oil leak. So I have a 3rd used intake to put on but I wanted to share some photos to see if maybe I am missing something. I never thread locked the intake bolts so I will do that next. I took RTV silicone and after thoroughly cleaning the intake I put the silicone on all the seams on the intake. I have another new set of felpro gaskets ready to install but I'll share the photos and hope someone might see something that I am missing. Any help would be greatly appreciated. Thanks in advance.
Just a note: You will see in the photos that the intake gaskets seem to keep the oil from entering the valves. The oil seems to be pooling in the little 'depressions' in the intake by the intake bolts.

Sorry for all the photos. Thanks again

Rob
 

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c713

c713

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I understand. I'll do that in the AM. Are you thinking it could be sleeping by the intake gaskets?
 
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c713

c713

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Thanks for the reply. I cleaned surfaces, checked and all seems level. I have new fel pro gaskets, clean intake. Ready to go. Should I add flange sealant or any other sealant to the rubber gaskets?
 

06 Dodge

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Thanks for the reply. I cleaned surfaces, checked and all seems level. I have new fel pro gaskets, clean intake. Ready to go. Should I add flange sealant or any other sealant to the rubber gaskets?
What size of the feeler gauge did you use to check the surface 0.003 bigger? Also you did check where intake mates to the head to be sure its true? My self have not used sealant but then I also have not had leaks like you are having...
 

crackerjack1957

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More than likely a MDS solenoid under the intake leaking pressurized oil if when you pull intake & there is a puddle of oil under there.
 
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c713

c713

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Hey.. thanks for the messages.. so the day before I installed the intake after thoroughly cleaning the heads and intake. I did add copper gasket maker around the rubber gaskets. installed the oil catch can and vented the breather tube. I have let it sit 24 hours plus now. Changed the oil. Castrol Synthethic 5w20. Today I will drive it and post back. I know it wasn't the MDS solenoid as the oil was at the top of the intake almost. I am positive it was at the seam of the intake. I will post what I find after driving. Torque is 109 inch pounds.. I also put thread locker on the intake bolts. So here's hoping. Will be back later!!!
 

RedSRT4Me

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Hey.. thanks for the messages.. so the day before I installed the intake after thoroughly cleaning the heads and intake. I did add copper gasket maker around the rubber gaskets. installed the oil catch can and vented the breather tube. I have let it sit 24 hours plus now. Changed the oil. Castrol Synthethic 5w20. Today I will drive it and post back. I know it wasn't the MDS solenoid as the oil was at the top of the intake almost. I am positive it was at the seam of the intake. I will post what I find after driving. Torque is 109 inch pounds.. I also put thread locker on the intake bolts. So here's hoping. Will be back later!!!

Ditch the gasket maker.
 
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