VR Running hot, LPG converter freezing over
Gentlemen,
I installed a new heater core in my VR, using the hacksaw method detailed on this site. When I took it for its first spin since then, the LPG converter froze over, and its running extremely hot (Normally sits on 1/4, up to 3/4, 4/4 at the moment). With the new heater in place, I am only getting hot air through the feet vents, not through the demister or normal vents.
I thought it might be some cheap coolant that i used causing it to run bad, but i replaced it with some better stuff and the LPG converter is still freezing, and the engine is still getting hot.
I have read that i should "bleed" the coolant system, but im not sure where the bleeding screw, or what the thermostat they keep talking about it.
Some other options i have read about is checking the flow of coolant to the LPG converter, but I'm not sure which hoses to disconnect.
Any help is greatly appreciated,
Kind Regards,
Frag.
Almost not here!
The gas converter is freezing over because the heated water/coolant is not getting to it. You have a blockage of some sort or the vaccuum line is off and not letting the heater tap to open.
Check all vac lines.
Check you have all the heater hoses in the right order.
White 05 V6 VZ Executive - Thrashed Ex Telstra car
and 3 Dangerous non ABS VN's
Hi Green, and thanks for your speedy reply. Come to think of it, if by vac hoses you mean what i think you mean, theres these 2 small L shaped plugs attached to what i think is a vacuum hose, one is red, one is black. When i was fiddling with the heater box i noticed that the black one wasnt connected to anything, so i attached it to a little node that was under the yellow one. The black ones node sucks air, the yellow one does nothing. Which heater hoses do you refer to? in the heater controls?Originally Posted by 88GreenVN
Sorry for the noob questions.
Last edited by Fragmaggot; 03-08-2010 at 12:53 PM.
Real cars are steel cars.
Make sure you remove all the air from the cooling system. There's a bleed nipple on to of the top of the thermostat housing.
BEWARE OF HOT COOLANT!
If I told you I was a compulsive liar, would you believe me?
Okay i took some pics to try and explain it
I think this is what was being talked about regarding vacuum hoses. When i was pulling the dash apart i noticed that the bottom one (Yellow circle, yellow hose) wasnt attached to anything, so i put it on the bottom part, where it sits in this picture (Red circle is a black hose).
Where the blue circle on the first picture is, is there meant to be anything attached to this, is the little node for the hose to slip over broken?
I looked for the heater tap, and im assuming this is it. Am i right? (its under the throttle body plate that the accelerator wire is attached too)
This is the LPG converter, which is freezing. It wasnt touched during the changing of the heater core, thats why i think its got something to do with the first image.
The vac hoses look OK.
When bleeding, the heater tap has to be open. If the white plastic "cam" on the end of the metal rod, to the right/forward of the red circle in your first picture is away from the end of the vacuum tree/vacuum switch it should be. The tap is on the inner LH guard. You should see the postion of the arm move on the heater tap when the temperature control valve is moved away from the cold position - subject to vacuum being present i.e. the engine has been run and there are not significant vac. leaks anywhere.
Your third pic is of the fuel line pulsation damper.
Just bleed the cooling system by cracking open the bleed screw (see ^^) with the engine running and a funnel - cut down coolant or soft drink bottle, dia. custom fitted to seal in the radiator filler neck with electrical tape around the bottle thread - to get the coolant level above that in the LPG converter and the high points in the engine.
Real cars are steel cars.
While doing the above procedure it may be worthwhile removing the uppermost coolant hose to the lpg converter to allow air to escape. Refit hose before running engine.
If I told you I was a compulsive liar, would you believe me?
Gentlemen, thank you for your time and replies. I just did what is to the best of my knowledge a coolant bleed :P. There was alot of air bubbling out the bottle so i assume i was doing it right. While i was warming the car, and after the bleed it didnt overheat, and the LPG converter didnt freeze. Ill take it for a drive tomorow and see what happens.
The top vents still dont blow hot air however, im guessing thats an unrelated problem.
Just a quick note, The Gas converter must have a constant coolant flow regardles of the heater taps etc. Should never be inline to the heater if a tap is fitted..
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