reasons for losing coolant

[alexgt]

Hi guys and gals

i have a 1994 gt its done 66000km

i changed coolant 3 weeks ago toyota pink as well as the oil and filter filled both while the car was cold to the max lines.

anyway so i check it yesterday oil is fine nice and golden very clean still

check coolant level down to the min line now my first thought was head gasket so took it to garage today had the cooling system presure tested for over an hour not one leaks found there is no gunk on the oil cap or rad cap the ticks over nicely no hunting at idle there is no water or white smoke from the exhaust even the guys at he garage were scratching there heads.

one said it might be that the rad cap is not holding presure and is coming out of there as steam like a kettle you boil it to many times and it will boil dry the only other thing would be to take the head of and see if it is the gasket but dont want to do that if they can help it.

thoughts any1 rep added for helpful advise/thoughts

cheers

Alex

 

[Decep82]

i think wen u flushed the system out there was air left in the system so wen u drove the car the stat opened and ur cooland level dropped a bit

 

[alexgt]

its lost alot of coolant mate i have topped it up over the last few weeks aswell and is back down to the min line.

 

[Mike_ep91]

leak in the rad??

 

[Paddy]

mine does this to, cant see a leak and no smoke or anything, aslong as its not causing a problem then just keep an eye on it

 

[alexgt]

leak in the rad??

has had the cooling system presure tested!!

 

[Patrick_g46]

im also having this problem....

 

[alexgt]

im also having this problem....

has any1 one said to ou what it might be, what things have you tried to sort it out?

 

[glanzanut]

have you actually had it tested for the head gasket i.e exhaust sensor. :freddy:

 

[munday]

has any1 one said to ou what it might be, what things have you tried to sort it out?

:holdit: He owns a clio with a fresh rebuild that burns oil :slap:

 

[Patrick_g46]

has any1 one said to ou what it might be, what things have you tried to sort it out?

try the radiator cap, these often dont seal properly

 

[munday]

try the radiator, these often dont seal properly

See!

 

[Patrick_g46]

:holdit: He owns a clio with a fresh rebuild that burns oil :slap:

clios burn a high amount of oil...its how they were when they came from the factory.

 

[alexgt]

going to have sniffer test done to check for hydrocarbons in the coolant what is the most effective way to test for heasgasket??

 

[Patrick_g46]

going to have sniffer test done to check for hydrocarbons in the coolant what is the most effective way to test for heasgasket??

i would have said compression test but you have already had that done?

 

[glanzanut]

my money is the head gasket:freddy:

 

[alexgt]

clios burn a high amount of oil...its how they were when they came from the factory.

but they are totally diffrent to a gt and i was talking about coolant

 

[Patrick_g46]

but they are totally diffrent to a gt and i was talking about coolant

yeh i understand mate, i think munday has confused you with unnessecary info (neg rep him?) . I am also talking about coolant...

 

[crail ep91]

i had a similar problem which ended up as a cracked thermostat housing

 

[alexgt]

thermostat housing was cracked but i had it changed 2 weks ago