You're very welcome. I'm glad it worked for you. I'm inclined to agree with you on the official process. That's why I ended up trying to think of a better way.

Just be careful you don't put too much pressure on. Glad I could help!

Thank you!

Yes I agree with you. Revisiting after a bit of driving is definitely a good idea.

Thanks! 😁 Glad I could help!

Great! Report back and let us know how it works for you.

Thank you very much!

The air makes its way to the highest point in the system eventually and this method provides the pressure to expel it. You will get some air bubbles in the system but the moving water will eventually carry it to the radiator.

If you drive it a bit, they'll make their way to the radiator eventually but by using my method you'll have removed enough air to be able to drive it without worrying about it overheating badly.

I find it hard to picture what you mean to be honest. It may be a case that you have an alternator belt that's too long and you're at your limit of adjustment. Otherwise maybe your alternator is installed incorrectly somehow, or you need to loosen the bolt that the alternator pivots on slightly. Are you sure you're moving the alternator in the right direction to tighten it, cause it moves the opposite way to what you might think. Without seeing it, it's hard to know though.

@@at1970 next time I'm doing it, I'll get the camera out.

@@Endfloat Great. Thanks

I fill it as far as I can using the "traditional" method, then get the last of the air out using this method.

You shouldn't need to go to all that hassle to get the system to work properly. I'm using the stock coolant system for the T3 without any mods. I'd be looking for problems in the stock system before modifying anything.

I've also been having issues with coolant blowing out of my overflow tank behind the license plate. After feeling that several of those blue plastic caps were failing my shop decided to replace the expansion tank with the metal one from Van Cafe that uses a standard type radiator cap. Even after this swap coolant is blowing out of the overflow tank and is now leaking at the silicone connectors in the joint of the aluminum coolant pipes in the middle of the van, and I just noticed coolant leaking all over my spare tire from somewhere up above it. My temperature gauge never goes above halfway so it's not overheating but somehow is pressurizing and blowing coolant out of everywhere. Do you know what might be causing this I'm stumped and this is my daily driver so I'm really stressed out about getting this fixed especially because I just replaced the cylinder head.

I don't think it would be any harm, but to be honest I'm not 100% sure if it's necessary.

I would recommend contacting brickwerks, who should be able to supply the correct hose. Once the new hose is installed, fill up with coolant, top up with the engine running then finish the job using the method I show in this video.

@@Endfloat Could you explain what is the difference between coolant and water?

@@stephenparker4735 coolant is a chemical that resists corrosion, freezing and boiling and is often based on ethylene glycol and it's usually mixed with water. Don't just use water in your engine or you'll cause a lot of problems.

@@Endfloat Thank you. I may have to drive for a week without it due to an emergency . Is it ok to do this temporarily ?

@@stephenparker4735 for a week it should be fine with just water but be sure to get coolant into it as soon as possible.

No because you're pushing the air out at the other end where it gets trapped by using the air pressure in the tank. You need to close the bleed screw before you open the expansion tank cap though.

Endfloat that makes perfect sense. This is on my planning next week, since I removed the rear heater. Really like the valve method, have an old wheelbarrow tyre where I can strip the valve of

Good stuff. Just make sure not to overdo it with the pressure.

Thank you!

Thanks for the info.

You're pushing the water down at the header tank end and as a result, up at the radiator end, expelling the air because there's a pressure differential between the 2 ends of the system This doesn't happen when the system is pressurised through normal operation. Also, you can do this with the engine cold.

@@Endfloat How does it reach the radiator if cold and thermostat is closed? Absolutely not saying this don't work - just trying to understand. Tanks :)

To tell you the truth, I never fully got that bit myself. I think the pressure gets through the pipework for the auxiliary pump, or maybe the thermostat will let a bit through but yes it definitely works.

@@Endfloat OK man. Appreciate your insight. ;)

@@Endfloat "there's a pressure differential between the 2 ends of the system This doesn't happen when the system is pressurised through normal operation." ...that explanation doesn't wash with SCIENCE!...you're going to need to explain that! ...why do you think they went from the early mechanical rod braking systems where the mechanical force to actuate the brake at each wheel was highly dependent on adjustment at that corner, to hydraulic braking systems...answer: EQUAL pressure in all components of the system means equal mechanical force at each corner!

I understand that but it still doesn't make a lot of sense to me. You can be sure they don't do all that faffing around when filling the system in the factory.

Endfloat yes it seems strange to me. I’m pretty sure most people wouldn’t bother. Especially as there is no explanation in the manual. I’m not a big fan of the official repair manual.

Give it a short drive (without letting it overheat) and try again. It sounds like you've an airlock. Make sure to leave that heater valve open too!

@@Endfloat Thanks, when you say heater valve, where is that?

@@gordonblues843 I mean literally turn your heaters up full on the dash. The valve itself is under the van up the front FYI.

You're using the air to push the fluid down at one end, giving a positive pressure which will allow you to let the air out at the other end. The air you're putting in doesn't get entrained in the coolant.