hey guys....
got a problem.put a new victor jr intake on and i have a small oil leak in the rear of the intake. pulled it up and put another bead of sealer down but no help. i had the same leak with the previous RPM intake. and it only trickles out when i get on it.
ok, so hear is my theory,i have a very high pressure oil pump in the motor. all im running is a PCV valve,no breather. now since there is no breather is there to much "internal pressure" and it is forcing its way out were the intake meets the block?
like i said, it only leaks when i get on it, while the oil guage reads 75-100 .
any suggestions are appreciated,thanks

You could also check the distributor gasket and the oil pressure sending unit. Both will leak oil into the same general area...MK

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hometown.aol.com/mkrauser/Chevelle.html (http://hometown.aol.com/mkrauser/Chevelle.html)

70 Chevelle Fathom Blue
70 Malibu Convertible Midnight Regatta Blue

Chicago - Suburbs

Sounds to me like your pressurizing the crank case at high rpm, get a breather whether it fixes the leak or not.

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Mike Reeh
Gold #34
San Diego, CA

Did you have the heads or deck milled? Sometimes when those two items are decked, you also have to the intake milled also so the evertything lines up properly.

It sounds like Mike is right on the money...no breather with a PCV valve equals strong crankcase pressures and they usually find the weakest link, in your case the intake manifold rear rail gasket. Get the breather installed on the opposite valve cover and your engine should 'breath' a lot easier with less effort. Good luck!

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'70 Malibu - 383 'Fog Fed' Stroker! Houston, Texas Gold Member #39
Chevellz Alwayz!

Also, if it gets really mysterious, there's an oil galley plug on the upper rear corner of the drivers side deck. I've had one leak, bummer deal, you have to pull the head to tighten it up.

Tom

Without a breather, a PCV valve is not functioning. To get a flow thru the engine, not only do you need a source for the vacuumn to pull the air but you need a breather to allow the air to enter.

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On boat motors, I don't use a PCV valve, I pipe from each valve cover to a T fitting in the intake manifold. This will vent the crank case a re-burn fumes by introducing it back into the intake.

Normally they just hang a couple of hoses, one from each valve cover, on a bracket on top of the flame arestor. That funks up the element.

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Wally
Gold #67
67 malibu