okay, im stumped here. i have a 99 4runner 3.4 v6, just recently it has started running hot. i just flushed the cooling system a few months ago, and the original coolant seemed to be pretty clean. it just started overheating, now it usually takes about 25-30 mins to get hot. i have replaced the thermostat, cap, and bled the cooling system. now it once it starts getting hot i can turn the heat on and rev the motor and the needle drops. im thinking maybe the water pump? also i noticed that the coolant backs up into the resevior tank. also, im thinking it might possible be the fan clutch. how can i test this? my truck has only 81,000 miles so im thinking the water pump should still be good. any ideas?
- posted
19 years ago