Guys,

Prev owner ran straight water, topped up every two weeks, known to get hot.

I drained and flush radiator, replace thermostat with a "hi-Flo" unit that opens at 170 Fahrenheit, new thermostat gasket and put in high qual Coolant concentrate and added 50% water. Fitted new temp gauge and Sender unit, appearred to be ok.

I drove the car about 30-50kms yesterday, seemed to be sitting on 90deg nicely, I have the mech fan and shround with a backup manual Elect fan. This morning I checked Rad Fluid, and level hadn't budged.

Drove car another 20kms this morning, with elec fan off, testing the cooling system, heated up a bit, but around the 80-90 mark. Parked car and turned off when it was at 80deg.

Came back an hour later, turned car on (temp read 60, usually 0 if left overnight) and drove to work (15km) halfway there temp goes up to 120deg (offscale) get to work, few drops of coolant look like they came out overflow, no real signs of leaks, rad cap is making small sound.... later I top the radiator up to find i've lost 2.5L of fluid!!!

Im working night shift, so will fix tomorrow, any ideas? I'm gonna look at water pump, check for any leaks (any ideas on best way) and poss get pressure tested?

Any other suggestions would be great!

Thanks.

1976 HX Ute 308

Edited by user Wednesday, 22 March 2006 7:43:31 AM(UTC)  | Reason: Not specified

Thanks Mikey, I'll replace that first thing to see if it makes a difference.

Is there anyway of testing if a water pump is actually pumping? or if the Thermostat has opened? or any other test I should do while im at it?

I may take it to be pressure

Pressure test radiator for possible leaks at radiator cap or hoses.

Overheating can be caused by a corroded out water pump and may have been over compensated by use of electric fan.

Best to remove from vehicle and properly check it, as it may have

If the water pump bearing seal is worn out water will piss out the hole underneath where the the fan and pulley bolts on.

Have your cooling system pressured tested, will tell you exctly where water is leaking from, may be Welsch plugs.

Straight wate