Coolant bleeding

[teenmal]

Well what do you suggest then ?

Ha ha , certainly Not hanging a scalding hot hose from the mirror , I am astounded that Mazda even suggested this procedure

Regards.

[g8dhe]

So you don't have a suggestion for fixing a problem at the roadside ?

[teenmal]

So you don't have a suggestion for fixing a problem at the roadside ?

Sorry ??, why have you changed the subject to the roadside you are beginning to confuse me a wee bitty.
At the road side or anywhere else I certainly would not hang a scalding hot hose from the mirror , I am very surprised that you or Mazda even suggest this.

Regards..

[g8dhe]

So what is your suggestion, we are still talking about bleeding the coolant there is no change of subject!

[teenmal]

So what is your suggestion, we are still talking about bleeding the coolant there is no change of subject!

As you said.

There is a kit that uses the same idea as the 2l petrol version with an additional feed from the engine outlet then across to the normally blanked off cap on the top left of the de-gassing tank - be aware this ONLY bypasses the pipe that has to dip down under the firewall, which can also trap air. It does not appear to have much effect on removing air/gas trapped within the engine itself.


You have made this statement , not me , what would you suggest other than hanging a scalding hot hose from the mirror.
I do not wish to turn this into a stupid argument peoples safety must be respected.

[g8dhe]

OK last comment, it doesn't appear to be able to bleed the air out of the engine itself, it only acts as a bypass for the pipe that dives under the firewall.

[teenmal]

OK last comment, it doesn't appear to be able to bleed the air out of the engine itself, it only acts as a bypass for the pipe that dives under the firewall.

Could you elaborate on this pipe that takes a dive, do you know its purpose and what it connect too , if anything.

Regards.

[g8dhe]

Look up the the diagrams that Steve Widdowson put together;
Basic fan operation https://www.igmaynard.co.uk/bongo/forum ... =3&t=48872

Cooling system diagram https://www.igmaynard.co.uk/bongo/forum ... =3&t=35902

coolant flow - (follow up to cooling diagram) https://www.igmaynard.co.uk/bongo/forum ... =3&t=36433

Pipe - expansion tank to heater circuit return https://www.igmaynard.co.uk/bongo/forum ... =3&t=49505

Mazda thermostat - A few observations https://www.igmaynard.co.uk/bongo/forum ... =3&t=39193

Water pump - opinions please https://www.igmaynard.co.uk/bongo/forum ... =3&t=47381

In particular last diagram here https://www.igmaynard.co.uk/bongo/forum ... 95#p515395

[teenmal]

Look up the the diagrams that Steve Widdowson put together;
Basic fan operation https://www.igmaynard.co.uk/bongo/forum ... =3&t=48872

Cooling system diagram https://www.igmaynard.co.uk/bongo/forum ... =3&t=35902

coolant flow - (follow up to cooling diagram) https://www.igmaynard.co.uk/bongo/forum ... =3&t=36433

Pipe - expansion tank to heater circuit return https://www.igmaynard.co.uk/bongo/forum ... =3&t=49505

Mazda thermostat - A few observations https://www.igmaynard.co.uk/bongo/forum ... =3&t=39193

Water pump - opinions please https://www.igmaynard.co.uk/bongo/forum ... =3&t=47381

In particular last diagram here https://www.igmaynard.co.uk/bongo/forum ... 95#p515395

Very good diagrams , Mr Widdowson has certainly spent a lot of time on the cooling system, had a quick look but having difficulty locating the pipe you refer too. Do you have any details of said pipe/hose .?

regards.

[rustyp]

There is a kit that uses the same idea as the 2l petrol version with an additional feed from the engine outlet then across to the normally blanked off cap on the top left of the de-gassing tank - be aware this ONLY bypasses the pipe that has to dip down under the firewall, which can also trap air. It does not appear to have much effect on removing air/gas trapped within the engine itself.

Do you know which kit this is?

[rustyp]

I believe there is some misunderstanding and therefore misinformation on my Bongo bleed-kits.

My kits connect the bleed-point on the cylinder head (diesel) or the cylinder block (petrol V6) using a pipe that travels upwards and connects just below the coolant tank.

Therefore any air trapped in the cooling system in the engine can travel upwards to the header tank and also coolant from the tank can travel downwards to replace the displaced air.

When filling the engine with coolant and the engine is started any trapped air warms up and expands increasing its' pressure. When the coolant tank cap is released any trapped air will rise upwards to the tank.

I can drain a diesel Bongo of coolant, fit a kit and refill in about 20 or 30 minutes.

The kits' idea isn't anything new, many vehicles come with degassing pipes from the factory