VN Executive S/W V6 3800
Overheating?
Went for a drive about two days ago. About 150ks and at the end was a dirt road (which I mention because it required slow running in lower range) about 10ks long. Hot day so was running A/C. Stopped the car at the end of the road, switched of the ignition. Motor promptly boiled and dumped half the coolant on the ground via the header tank overflow with much steam.
Left the car and came back next day. As it happened was no water for about 1km and I only had a 600ml container but no need to go into that. Filled radiator up again and system OK from then on.
My question is, why did it happen? I think it only boiled after I switched off the ignition. Could it be that the fan wasn't working? Would this cause it? There was no sign of overheating on the temp gauge, reading was on the first division whole trip.
Um.
I'm pretty ****ed at the moment, so I'm not thinking straight.
But water isn't meant to leak from your cooling system at all.
You had a leak there to start with by the sound of it.
Originally Posted by PaRaDoX
VN Executive S/W V6 3800
Just been reading another thread. In it, they talk about 'Rushing sound behind the dash when driving'. I have that same sound. Put it down to either air in the A/C or low level in A/C. Never thought it was the radiator but evidently it is. It gets air in the water or something. Maybe this is my problem? Anyone have a method for bleeding? They never said in the thread.
I have NO idea what you're talking about there.
So I'm not gonna advise any further.
For external use only
by "dumped half the coolant" do you actually mean HALF the coolant? 5 litres? Or did it just take a ****.
Because if it just took a **** for a minute, that's normal. When you stopped and turned the car off, the aircon fan turned off, and air stopped moving through the radiator. The only two things that cool the damn thing down. So your car sat there, and heat soaked into the coolant. As it heated up, it expanded, and the pressure rose above 130kpa (or whatever your radiator cap is rated to). As a safety measure, it vented through the overflow runner to the side tank, and once that was full, onto the ground below.
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VN Executive S/W V6 3800
You may well be right. Just that I have never had it happen before. Also, it's expensive on coolant. Maybe it wasn't half the radiator but it was at least the contents of the overflow tank. Took about a litre to fill the main radiator header as well. So say about 2.5 litres of coolant dumped. Messy and of course it kills grass stone dead so environmentally unfriendly. Ever want some weedkiller, try coolant.
I will look into getting air out of the system, though. Maybe rig a tube up to the radiator core filler and run and fill? With the heater on. And try running the motor (idling) for a few minutes before switching off. Also, I am wondering if the fan actually runs. Maybe check that, as well.
vp bt1 gts replica
hmm if u leave the key in the on position does the thermo fan on a v6 still work - on my 8 i rigged my thermos to do just that they are temp controlled but turn off with the car but if the temp was for whatever reason high i could stop the car but leave the key on accessory and the thermo would still work till the temp was down - not that it does the twin thermos work a treat
Jackson
I had the same problem just tonight. My VP seemed fine the whole trip running the best ever. temperature was normal the whole time and then when i turned my car off and came back about an hour later, a whole load of coolant was dumped under the engine. I had my radiator and whole coolant system and water pumped replaced the day after christmas, so i dont know what happened.
Donating Member
sometimes when you overfill the coolant system itll seem fine whilst when you stop it push the extra fluid out of the overflow. I suggest you fill and bleed system properly as stated in how to thread if it still does it look at thermostat
hi,
my rb30 vl commodore has been slowly overheating ever since i bought it a month ago, takes about 15mins of driving before i notice the temp needle is 1 bar from max,i have changed the water temp sensor,gets same temp reading, i have flushed the engine and radiator with the hose, i have changed the water pump with a brand new one, i have removed the thermostat all together, i have been using the bleed bolt on the plennum no air comes out of it even after a complete drain of the cooling system. there is no leaks in any hoses that i am aware of....the oil in the engine is at normal level, but, the strange part is when the car temp hits halway the oil light comes on in the dash...but the oil light only comes on at this tempature then stays on until the car is cold again and gets to half way again. and its starting to **** me off because im paying out on parts that obviously have no effect on the problem... any help will be very appreciated
Donating Member
Does the vl use coolant oil looks fine i.e. no milkyness
yep oil looks fine,didnt appear to have any water in it, cause i changed that a week ago also, and plenty of greeen coolant, i even removed the aircon radiator from the front of the radiator ripped of its electrical fan and placed it on the front of the radiator and hooked up a switch on the dash yet runnin the electric fan, it has absolutely no effect on the very high temp reading
Donating Member
ok you still running clutch fan? maybe clutch fan is gone and wont pull enough air
Does it use coolant?
hmmm yeah the clutch fan is there aswell, but the fan shroud isnt...
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