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Discussion Starter #1
Had an oil leak at the front seal of the manifold, fixed it yesterday.
After removeing the manifold, I found that there is no rear water passage in it, but the heads have the holes in it.
It's 302 year 84, edelbrock performer alu heads and a edelbrock performer rpm manifold.
Cause I did't know about it, I was running it the last 1 1/2 year, without any probems!
What shall I do, what can happen?
Thanx in advance.
Martin
 

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The heads have water passage holes in the rear because they are interchangable from side to side (you have to rotate them). The stock intake does not have a rear water passage.

You do not have a problem.
 

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My old original 289 2 barrel intake has no rear water passage.

My Edelbrock RPM intake has a rear water passage.

My Victor JR intake has no rear water passage.

My later 302 EGR 2 barrel intake has a water passage.

Sheesh, I wish they would make up their minds, LOL.
 

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I just pulled my RPM off my 289 yesterday to replace leaking gaskets. Same deal, no rear passages. But the rear is where the gasket blew. Too much pressure?
 

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On intakes with no rear water passage I will paint the area around the port opening on the heads and also coat the intake manifold solid where the water port would have been and I also fill in that part of the intake gasket completely with red RTV. I haven't had a leak so far.
 
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