R28 0 Posted April 26, 2012 Report Share Posted April 26, 2012 The VR seems to be losing coolant at the rate of a litre or so a week, There are no leaks what so ever, but I'm noticing alot of pressure in the system, so I think its dumping it out the over flow. One thing i've also noticed is sometimes the top rad hose is rock hard and boiling hot and the bottom one soft and cold. Now this lead me to believe it was the thermostat but then sometimes both hoses are rock hard and boiling hot :/. Another thing was that when I rev the engine with the cap off the header tank, I'm gettin alot off bubbles surfacing which makes me think maybe exhaust gases = head gasket failure but I've not got any oil/water contamination or any exhaust smoke/steam.... Please help as this is driving me insane Thanks. Link to post Share on other sites
kezwaldo 0 Posted April 27, 2012 Report Share Posted April 27, 2012 mine drinks a litre a week too thought it was nothing as couldnt see any leaks until the other day i discovered a drip under the thermostat housing ...... Link to post Share on other sites
Lukey. 381 Posted April 27, 2012 Report Share Posted April 27, 2012 Yea check your crack pipe and thermostat housing at the seals and their surrounding areas for signs of a leak Link to post Share on other sites
R28 0 Posted April 27, 2012 Author Report Share Posted April 27, 2012 i've replaced the whole cooling system, samco hoses, thermostat housing, stainless steel crack pipe all with new o rings. uprated water pump and electric water pump, the only thing i've not done is the rad i'm 100% sure theres no leaks. its dumping it out the over flow i'm sure of it, because theres too much pressure. i just need help findin out where all this pressure is coming from. The seal on the header tank cap is 100% too. Only thing i can think of is either a stuck thermostat or exhaust gases in the cooling system , i might just swap the thermostat so i can rule it out lol. Link to post Share on other sites
VR6Pete 1,455 Posted April 27, 2012 Report Share Posted April 27, 2012 thermostat is the way forward, you can buy DIY kits to test for presence of exhaust gasses in your header tank. Link to post Share on other sites
Lukey. 381 Posted April 27, 2012 Report Share Posted April 27, 2012 i've replaced the whole cooling system' date=' samco hoses, thermostat housing, stainless steel crack pipe all with new o rings. uprated water pump and electric water pump, the only thing i've not done is the rad i'm 100% sure theres no leaks. its dumping it out the over flow i'm sure of it, because theres too much pressure. i just need help findin out where all this pressure is coming from. The seal on the header tank cap is 100% too. Only thing i can think of is either a stuck thermostat or exhaust gases in the cooling system , i might just swap the thermostat so i can rule it out lol.[/quote']Maybe you should have led with that lol Link to post Share on other sites
HAMMER_VR6 0 Posted April 27, 2012 Report Share Posted April 27, 2012 perhaps try a new expansion tank cap? they are supposed to release pressure at a certain amount of PSI, perhaps it isn't releasing. otherwise sounds like head gasket Link to post Share on other sites
Recommended Posts