Funnel vent

[Shootinok]

We changed the Trans filter and fluid in sons car and when we were filling it back up, the fluid kept backing up in the tube and we’d have to wait for it to burp or it would fill The funnel and leak between the fill to be and the funnel. My son said “ we need a straw to let air out“.
Turned out to be a great idea. We stuck a small vacuum hose in it and put the top through the hole in the funnel. This kept it in place and the fluid flowed in without backing up.

 

[Bigblue&Goldie]

We did the same thing with bottles of beer in college....

 

[Skyman]

That works. If you don't have a piece of hose handy, you can lift the funnel slightly so that air can escape between the funnel and the tube.

 

[Kent_B]

I've been known to cut a chunk of wire coathanger to create an air space next to the funnel. Same principle, all good solutions.

 

[MileHighRover]

I've been known to cut a chunk of wire coathanger to create an air space next to the funnel. Same principle, all good solutions.

This is what I do. I thought this was common knowledge.

 

[OccupantRJ]

As in plumbing, you gotta get the poots on the roof!

 

[rooster59]

Your son is a future engineer with mad skills

 

[RTM]

My funnel has a groove where the discharge ends is. Wish they would do that on all funnels

 

[gregs]

If you have a 3d printer, there are a bunch of turbo funnels on thingieverse.

 

[whateg01]

That works. If you don't have a piece of hose handy, you can lift the funnel slightly so that air can escape between the funnel and the tube.

I bend a piece of mig wire and hang over the edge of the dipstick tube. Same when pouring used oil into the empty jug. Some of my funnels have ribs on the outside for this but not all.

 

[Bert_]

Just leave the dipstick in halfway.