Drain holes in inlet manifold ?

[WokingWedger]

I was having a bit of a clean around in the engine bay and noticed some dirt and small leaves trapped in a hollow in the inlet manifold. There appears to be drain holes at the bottom of the hollows. They can be seen by looking vertically down the drivers side of the plenum chamber, between the inlet branches.

Where do these holes go to ? Cant surely be into the valley ?

Edited by WokingWedger on Wednesday 19th November 10:19

[rev-erend]

Spot on.. there is an air gap between the valley gasket and the inlet manifold.

[WokingWedger]

Spot on, it does drain into the valley (where I pressume the push rods come through)?

or

Spot on, it it doesnt drain into the valley, but goes into some sort of air gap ?

[Boosted LS1]

To be correct it drains onto the valley gasket. Nothing will enter the actual engine via these drains.

[spend]

Boosted LS1 said:

To be correct it drains onto the valley gasket. Nothing willshould enter the actual engine via these drains.

tempting fate

[GreenV8S]

It drains onto the top (outside) of the valley gasket where it sits gently rusting it away until it eventually rusts through, dumping muck and rust onto the top of the cam and crank shaft.

[SimonV8ster]

Is that why you can buy composite ones so that they don't rust ??

[Boosted LS1]

GreenV8S said:

It drains onto the top (outside) of the valley gasket where it sits gently rusting it away until it eventually rusts through, dumping muck and rust onto the top of the cam and crank shaft.

Good lord Peter, how old are your engines? If you want a bonnet ebay's the place.

[Boosted LS1]

spend said:

Boosted LS1 said:

To be correct it drains onto the valley gasket. Nothing willshould enter the actual engine via these drains.

tempting fate

Clearly the case if your engine hasn't been fitted with an intake gasket or is Peter's engine.