Overheating/coolant loss on long trips

87hilux7mge · 04-16-2011, 08:37 AM

if the rad is original, might be a good idea to look for a new one. to purge the system of air, put the front of the car on jack stands, high as you can get em safely. then take the cap off the rad, and start the car. make sure the coolant is circulating, and while it is doing so, top off the rad. it may take a few mins as the car will warm up and open the thermostat. to help the process along, squeeze the lower and upper rad hoses and heater hoses periodically.

another thing you can do it replace your thermostat. if its a stock on, get a new one, as it may be malfunctioning. also check if you fan is working properly, you could have a slipping clutch. this would not attribute to you losing coolant, but might have to do with your temp fluctuations.

04-16-2011, 08:37 AM	#4
87hilux7mge walbro fp Join Date: Dec 2010 Location: spokane Posts: 479	if the rad is original, might be a good idea to look for a new one. to purge the system of air, put the front of the car on jack stands, high as you can get em safely. then take the cap off the rad, and start the car. make sure the coolant is circulating, and while it is doing so, top off the rad. it may take a few mins as the car will warm up and open the thermostat. to help the process along, squeeze the lower and upper rad hoses and heater hoses periodically. another thing you can do it replace your thermostat. if its a stock on, get a new one, as it may be malfunctioning. also check if you fan is working properly, you could have a slipping clutch. this would not attribute to you losing coolant, but might have to do with your temp fluctuations. __________________ 87 toyota 4x4 single cab short box pickup, 7MGZE.