Thread: Getting air out of heater matrix when RAVE process fails

Try Discowhites post here,,
could have been written just for you---

http://www.aulro.com/afvb/good-oil/9...radiators.html

Thanks Pedro. These systems are a poor design in terms of bleeding. I have tried parking it on a steep hill etc to do the bleed. I might have to get a power bleeder and do the bleeds myself. Probably work out cheaper in the long run than paying a shop to do it.

Against my better judgment (perhaps) I opted for Dex-Kool OAT. Time will tell how the gaskets handle it. It is holding pressure (a lot of) all night, so the cap and system is fully sealed which is what Dex-Kool requires. The pressurised air hopefully wont be causing clag while I get the bubbles out.

Cheers

Ordered one of these

[ame="http://www.amazon.com/gp/product/B00804HWOU?psc=1&redirect=true&ref_=oh_aui_detailp age_o00_s00"]Amazon.com: FJC 43610 Radiator Coolant Vacuum Refill Kit: Automotive@@AMEPARAM@@http://ecx.images-amazon.com/images/I/51DQ2KvyNuL.@@AMEPARAM@@51DQ2KvyNuL[/ame]


Sick of buggering around with bleeding manually!

Cheers

After you filled the system with raised tank fit only partially the bleed screw as to let coolant out near it, start the engine and keep it rev'd above 1500 rpm(as the mechanical bypass valve from the thermostat to be opened) untill no bubbles are coming out near the bleed screw then tighten it back, top up the tank and tighten well the tank's cap, repeat that procedure with warm engine too just protect yourself against hot coolant which will come out near the bleed screw.

Thanks mate. Do you keep the overflow cap open during the process?

Cheers

firstly yes but when the bubbles are starting to vanish the cap goes back, the cap must be on and tightened well cos it should keep 1.4 bar in the system, that's the normal operating pressure... then when you dont see more bubbles it means that the system is sealed and free of air cos being under pressure there's no way for air to get in only for coolant to get out if you see what i mean

Thanks mate. I have just done that. Will wait till its cool, top off the overflow and see how it goes. The vacuum pump will be handy to do my own coolant changes as it should suck it all out of the heater matrix.

Cheers

Bloody thing...still has air in it. I can hear it from inside when revved. I think the air is getting less, but its still there. I have read a trick to reverse the heater hoses and apparently that pushes the air out. Not sure if I want to try that one.

Cheeers