Engine bay drain holes

[mauro12]

Hello guys , I realized many times that during rain or when I wash the car , I have a bit of water entering from the hole near the wiper motor . I believe that hole should be plugged . I attach here some photos , can you confirm me that these holes needs to be plugged ? I put a temporary plug in one of those but is made of plastic and is not sealing properly . Probably the hole marked in yellow is a real drain hole and should not be plugged .I hope you can help me . Thank you

[BobH]

Pawel put together a list of drain holes and plugs, see here

file:///C:/Users/Bob/Downloads/Water%20drains_amended%2009_04.pdf

On my car the hole by the wiper motor is plugged, i can't see a need for a drain here, as the cowl slopes down to the engine bay, so any water should run off, not sure why there is a hole in this position?

The other hole you circled in yellow, Pawel says it's a good idea to plug, as it leads to a box section, and then to the wheel well, where the drains may be blocked

Apologies, not sure where that link came from, luckily Gary has provided the correct link

[GM]

Here it is as an attachment

[mauro12]

This picture can get you confused because is for British cars . Don't you have the same drain hole near the wiper motor ?

[BobH]

On my RHD car there is a plugged hole right next to the wiper motor, as i said the cowl that the motor sits in slopes down into the engine, so i can't see that water would collect there, but LHD cars may be different.  Consensus of opinion is that this hole should be plugged

[Pinder]

I can confirm the the hole below the wiper motor should have a rubber plug. it will leak into the interior if it gets water there. so plug it up.

[mauro12]

How about the drain hole under the brake booster ? Should be plugged ?

[Pinder]

On my car directly under the brake boster there is a drain hole between where two sheet metals are welded. it drains to the ground in the wheel well.

[mauro12]

So is good idea to leave it free ? No plug ?