Rover V8 oil gallery detail

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minorv8
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Rover V8 oil gallery detail

Post by minorv8 » Wed Sep 04, 2019 5:17 am

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 ?
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unstable load
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Re: Rover V8 oil gallery detail

Post by unstable load » Fri Sep 06, 2019 12:34 am

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.
Cheers,
John

minorv8
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Re: Rover V8 oil gallery detail

Post by minorv8 » Sun Sep 08, 2019 6:13 am

Doubt it because there is only the solid plug upstream of this sleeve.

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Ian Anderson
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Re: Rover V8 oil gallery detail

Post by Ian Anderson » Sun Sep 08, 2019 7:32 am

Could that threaded hole near it have been drilled too deep and the oil escape through the threads?
The sleeve would stop that happening?

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minorv8
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Re: Rover V8 oil gallery detail

Post by minorv8 » Mon Sep 09, 2019 4:19 am

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.

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ChrisJC
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Re: Rover V8 oil gallery detail

Post by ChrisJC » Mon Sep 09, 2019 5:27 pm

Perhaps it sets the depth of the core plug when it's inserted.

Chris.
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