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[standingtree]

Hi all!
Here's a question about the small black breather box that sits on top of a V6 plenum (the one with four inlet pipes, two big and two small). On its underside there are four outlets in a bridge, helpfully pictured by RonaldMcBurger at http://www.omegaowners.com/forum/YaBB.pl?num=1152598350.

How important is the 3D O-ring seal which runs down the middle of the bridge, dividing it laterally? And what would be the consequence of it not sealing?

I have to confess to chopping a (small) corner off the bridge to get the breather box back in its hole. Act in haste, repent at leisure...

Thanks in advance

Regards

Standingtree 

[ferrari jason]

dont know what the purpose is but i broke mine a while ago and i replaced it with a normal o ring and have had no problems with it HTH

[standingtree]

Jason -
Interesting! Though it seems odd that the makers would go to the trouble of providing for (and making) the fancy bridge seal if it doesn't do something useful. But who knows?

[Kevin Wood]

The seal around the hole in the top of the plenum is vital to stop unmetered air entering the engine and causing running problems.

The seal between the two halves of the plenum separates the two intakes. If it leaks, it might affect low down torque a little, as these two halves of the plenum should be sealed from each other until the multiram valve at the rear of the plenum opens.

Kevin

[standingtree]

Kevin -
I'd assumed that the plenum below the bridge is one chamber, directly supplying all six intakes, which receives air only from the first stage of the multiram until the second stage opens. In that case the division wouldn't be doing much. But if the plenum is actually two independent chambers, each feeding all intakes, then bridge sealing would matter! And as mentioned, the main circular seal is vital to keep out unmetered air.
I should have taken the chamber off and looked rather than asking daft questions. Which I'll have to do now anyway to put in a new breather box... if I can find one 

Thanks.