Is this oil on my intake and where does it come from?
If you put a straight edge on a OE head you notice a rise in the center of the head on both rails of the head.
This is what people that use fabbed or cast valve covers on cast surface OE rails run into and then wonder why they leak or bust corners off.
I literally had to add 1/8 more gasket on each end to get mine to seal.
I started with the original rubber type Felpro gasket and then got another set and cut about 6 inches of the ends off .
I laminated those together and then mototooled a gradual taper from the ends down to the center of the gaskets and the aluminum fabbed covers fit like a glove and sealed perfectly.
I ran this motor for a few years afterwards and this is how the motor looked. (Dry as a bone)
The magnum heads were/are flat and straight, so I didn't have that problem.
The ribs in the magnum covers might help a little for structural strength, but the fact that they are literally flat front to rear would probably cause the same problem on an LA motor as I had putting flat fabbed covers on the LA heads.
I doubt it, because mag heads are flat on the sealing surface of the heads both ways.
If you put a straight edge on a OE head you notice a rise in the center of the head on both rails of the head.
This is what people that use fabbed or cast valve covers on cast surface OE rails run into and then wonder why they leak or bust corners off.
I literally had to add 1/8 more gasket on each end to get mine to seal.
I started with the original rubber type Felpro gasket and then got another set and cut about 6 inches of the ends off .
I laminated those together and then mototooled a gradual taper from the ends down to the center of the gaskets and the aluminum fabbed covers fit like a glove and sealed perfectly.
I ran this motor for a few years afterwards and this is how the motor looked. (Dry as a bone)
The magnum heads were/are flat and straight, so I didn't have that problem.
The ribs in the magnum covers might help a little for structural strength, but the fact that they are literally flat front to rear would probably cause the same problem on an LA motor as I had putting flat fabbed covers on the LA heads.