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Rover V8 oil gallery detail

Posted: Wed Sep 04, 2019 5:17 am
by minorv8
I removed the oil gallery plugs to properly clean the block. It was a bit messy and needed a thorough scrub. Anyway, I noticed an interesting detail underneath the two plugs at the front of the block in the lifter gallery. Underneath the plugs there are two brass sleeves, sort of restrictors. The thing is, they are above the actual galleries, just underneath the plugs. The plugs are 5/8" and the hole in the brass sleeve maybe 1/2". Any ideas ?

Re: Rover V8 oil gallery detail

Posted: Fri Sep 06, 2019 12:34 am
by unstable load
They are possibly metering sleeves that will create a restriction in the system to maintain pressure upstream for the components in that section of the engine.
That way, if a component wears or fails downstream, that section still has pressure and hopefully doesn't also fail.

Re: Rover V8 oil gallery detail

Posted: Sun Sep 08, 2019 6:13 am
by minorv8
Doubt it because there is only the solid plug upstream of this sleeve.

Re: Rover V8 oil gallery detail

Posted: Sun Sep 08, 2019 7:32 am
by Ian Anderson
Could that threaded hole near it have been drilled too deep and the oil escape through the threads?
The sleeve would stop that happening?

Ian

Re: Rover V8 oil gallery detail

Posted: Mon Sep 09, 2019 4:19 am
by minorv8
No threads on the plug nor in the block. Just for fun, I pulled the same plugs on another 4.6 block as well and it has the same sleeves fitted.

Re: Rover V8 oil gallery detail

Posted: Mon Sep 09, 2019 5:27 pm
by ChrisJC
Perhaps it sets the depth of the core plug when it's inserted.

Chris.