Can oil leak out of an intake manifold? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 08-12-2004, 10:37 AM
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Can oil leak out of an intake manifold?

I keep getting oil on the right side of my engine and it pools up in parts of my manifold and is all over the head and headers i cant tell if the head is leaking oil the headers or the manifold i replaced the valve cover gasket and im pretty sure its not leaking any ideas?
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Old 08-12-2004, 10:56 AM
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What engine are you talking about Chevy Ford Dodge or are you speaking of a Foreign job?
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Old 08-12-2004, 11:07 AM
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what, are you kidding? you have to ask? hahahahaha!
oil on the intake is a frikken trademark. i think they have it copywrited even. hahahahaha!
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Old 08-12-2004, 11:28 AM
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yeah its a 350 SBC and edelbrock oerformer RPM if i get a new gasket do i coat the bolts with anything? it looks like it is coming from around the bolts
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Old 08-12-2004, 11:36 AM
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I just had to ask. man cut a guy some slack. Just trying to get more info.

That is where mine pools oil. I figure it is coming from the breather in the valve cover but not sure. i just wash it off every couple of months and don't worry about it.

I was load a C-5 air craft and saw a bunch of hydraulic fluid running down the inside wall. Told the crew chief, which he went running to the area climb up and check the level of fluid and told me Oh that is good I worry when it stops flowing.
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Old 08-12-2004, 11:46 AM
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when changing valve cover gaskets you should coat them (cork style is best) with silicone gasket sealer
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Old 08-12-2004, 11:55 AM
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bolts

Put some sealer on the threads. The oil will wick up the threads and run out onto the intake. It' a common problem and the sealer usually fixes it.

keith
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Old 08-12-2004, 12:03 PM
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You clearly posted a question that deserves a serious answer.

Yes, as K-star stated above, you need to coat the bolt threads. I have used silicone in the past, but have recently been using ARP's thread sealer . Try either on clean bolt threads and the holes and it should solve your problem. You can also place a small cove bead of silicone around the bottom of the bolt head for good measure. Good luck, Ed www.edgesz28.com


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Last edited by edge; 08-12-2004 at 12:43 PM.
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Old 08-12-2004, 01:04 PM
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ok i think im gonna just try to pull out the bolts that have oil around them without pulling off of the whole manifold im pretty sure its definitely leaking from some of the bolts.
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Old 08-12-2004, 01:36 PM
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Quote:
Originally posted by edge
You clearly posted a question that deserves a serious answer.

Yes, as K-star stated above, you need to coat the bolt threads. I have used silicone in the past, but have recently been using ARP's thread sealer . Try either on clean bolt threads and the holes and it should solve your problem. You can also place a small cove bead of silicone around the bottom of the bolt head for good measure. Good luck, Ed www.edgesz28.com


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I second that, 3m weatherstripping sealer works great too. Coat all head, water pump, and intake bolts. Good idea about coating under the heads, just for security measures.
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Old 08-12-2004, 01:37 PM
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pull one bolt at a time, wipe it off and maybe stick some rag into the hole to soak some up. use permatex aviaton 300 on the threads even #2 should be okay, dont use silicone. it probably works but i dont like silicone inside the engine. did that to my leaky ones on my truck, stopped 3 out of 4 of them from leaking. i too thought it was coming from the pvc hose for years but it isn't.
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Old 08-12-2004, 01:55 PM
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sealer

I also prefer the arp teflon sealer, but others work as good. One thing you will need to do no matter what sealer you use make sure the bolt and the holes are clean of all oil and also dry. I would use brakecleen to make sure the oil is out of the holes. No matter what sealer you use if the holes are wet with oil it will not work..

Keith
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