1957 Mercury 368 engine-rocker arm oiling problem

Right (passenger side) rocker arm - no oil from block through cylinder head to rocker arm oil feed with rocker arms removes. Used electric drill with hex bit to operate oil pump without engine running.

[@pauljanssen7594]

And some of those engines had a cam cam type of timing oil in slot for the arms to be oiled. Like the old 265 Chevy how to slot in the rear of the camshaft. Some have a oil groove in a camshaft and if you don't line up the oil holes in the cam bearing you're not getting any oil to the rocker arms valvetrain

[@Volterrific]

Rockers are oiling ok. The knocking sound is coming from lower in the block

[@2packs4sure]

I thought the 368 had that intermittent top end oiling where the cam spins and opens the passage or was that just the Yblock or am I completely wrong about all that ?? lol

[@Volterrific]

Apparently that’s one cause. Another is plugged or partially restricted gunky oil passages. If I can clear a blockage, that’s a lot easier than pulling the cam. The engine has excellent compression and runs great with the rebuilt heads. Really don’t want to do the block $$$

[@2packs4sure]

@@Volterrific When the cam and bearing are in position to line up the oil passage does it feed both heads or just one?

[@Volterrific]

@@2packs4sure cam bearing 2 for left side, cam bearing 4 for right side

[@2packs4sure]

@@Volterrific Oh boy,, ok,,, well good luck sir I've been a fan many years,,, since I saw you named as the owner of a 58' Lincoln in Collectable Automobile magazine..
P.S. Is hitting the passage with air pressure from the head side to potentially clear a possible obstruction out of the question?

[@Volterrific]

@@2packs4sure I’m going to squirt a solvent in that hole and use my rubber tip air gun to try to back flush it. Do several of those then see what happens. If I get lucky with oil to the rocker arm, I’ll drain the oil/solvent and refill and do maybe 2 oil changes to remove the solvent. Fingers crossed!

[@pauljanssen7594]

Was that the same engine I heard that had the rod knock good prime two-engine you're in trouble you got a bearing problem like somebody dropped the bolt down the intake. Pull don't take it apart and see would damage has been done.

[@Volterrific]

No bolt dropped down the intake. The knock is coming from lower in the engine.