1jz water leaking

[Hash_ra23]

G'day guys

I'm havin a water loss issue on my 1jzgte. My water level goes down while driving. A mate noticed that i was leaking water out of the overflow area on a drive once. I also noticed after i parked the car that the overflow bottle was covered in coolant. Coolant does not seem to boil and the temp guage reads constant just above the halfway mark. Although this is a ma70 1jz conversion and i don't think its very accurate. The car runs smooth and strong with no smoke and no signs of BHG. Water is not lost while the car is parked.

Things i've replaced are:
Rad cap (0.9bar)
Thermostat
Coolant

help please?

Cheers
Hash

[Dazza]

I would be checking things like radiator and heater hoses for a small leak,or even the water pump. If there is a slight leak in the cooling system air will be sucked in through the leak when the engine cools down ,instead of sucking the coolant back out of the overflow bottle and when your engine warms up again more coolant will be pushed into the overflow bottle.It could even be your heater core leaking, but you normally notice the window fog up when you use your demisters if the heater core is leaking.

[Hash_ra23]

thanks...i'll have a look at that. any other possibilities?

[Darola]

Hey there mate.... check the water pump... they can leak only under pressure as in while driving... or while cooling down.. it leaks just under it..

Ed