I own a 2004 V8 4runner. Its mileage is about 38k. I was driving when I noticed the AC blowing warm air. I checked to see if the heater was on, but it was off. I switched off the AC, and drove home. When I turned off the engine, there was this hissing sound(like gas is being released) that lasted about 1 minute, coming from behind the engine. The next morning, I checked the radiator water level, it was quite low. I refilled it and also noticed the coolant container was empty. I cranked the engine(with the radiator not covered) it came on smooth, but within seconds the radiator started foaming. I covered the radiator, drop the hood and drove off , the Temp gauge was at running level(i.e. somewhere at the middle). After driving(with the AC on) for about 10mins, the gauge shot up towards the red mark, I turned the AC/ engine off and left it to cool off. When I drove off again, it took about 2mins and the gauge was rising again. I noticed that if I Moved faster, the gauge came down. I would like to get some expert advice on what the problem might be and what solution to proffer. Thanks in anticipation
Why is temp gauge shooting up. The radiator water level is low. on 2004 Toyota 4Runner
by jamal-k in Portsmouth, VA on May 23, 2012
1 answer 1 comment
ANSWER by globalhelper , May 23, 2012
i would start by pressure testing the cooling system to find a leak. sounds like poss a hose. also have it ck'd for headgasket issues also.the temp issues sound like an air pocket
COMMENT by jamal-k , June 01, 2012
Thanks. Went for the pressure test, and we found a leaking hose!