airlock in heating valve help please hijet 1.3 lpg x reg

Submitted by barefoot on

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hi all new to site and to hijets. have an overheating problem and have drained my cooling system. but seems to be airlock in my heating system which i cant flush out, basicaly when i refill from the front rad only water coming up through the inside cap not the little heater valve. any help would be greatly recieved. please can you make it simple as not a mechanic just a girl with a van, cheers!

bleeding system

Submitted by mick49 on

Hi bearfoot,when bleeding the system fill the radiator(removed front panel) with cap under seat removed.Pour untill water is overflowing,refit cap under seat.Top up rad to full,refit rad cap.Start the engine remove the bleed screw from heater matrix until the water comes out.Retighten bleed screw remove rad cap top up as ness the system should be ok.Hope this helps Mick 49

Mick H

thanks for help

Submitted by barefoot on

cheers for the help, can i just confirm the bleeder screw is the plastic little cap just on the engine under the seat, it just pulls away to reveal a tiny pipe?
sorry if i appear dull but just want to check,
Cheers,
Barefoot

still not fixed :( hijet 1.3 lpg

Submitted by barefoot on

hi, thought i had fixed my overheating problem but after 20mins of driving stopped at some lights and temp gauge went through the roof. bubbling from under the seat and some water pushed out through expansion tank tube. no heat from heaters. Do i still have an air block or is it something else?
Any help would be greatly recieved!
Lisa

re:airlock in heating valve help please hijet 1.3 lpg x reg

Submitted by 8bit-ash on

Hi, If you have LPG chances are you don't have the bleed valve for the heater. the bleed valve you seem to be describing sounds like the little lug on the metal rocker cover (the bit with Daihatsu written on it). Thats nothing to do with the coolant system.
The bleed valve you need would have been where the coolant pipe branches off the the LPG system under the drivers seat, it was removed to fit the lpg. Instead you are best to get a funnel and a length of pipe long enough to raise above the heater matrix, Get a snug fitting bung in the coolant fill pipe under the passenger seat and fill the funnel while the engine is running. Hold it for a bit and most of the bubbles should come out.
Remember once you've done it let it cool then do it again.