I have a 94 chevy beretta. It keeps over heating. The shop says the water pump is fine. when it gets hot water pushes through the raid. cap. The strangest part is when I am not on the gas & coasting the temp rises. When I am on the accelarator it cools. My mechanic (Known for his good work) has even riged a x-tra fan on it & it still runs hot. It now sounds like a jet due to all the fans. Hoses are good therm. good new raid. cap. what else could it be ?
2006-09-16 14:27:34 · 7 answers · asked by lil bit 3 in Cars & Transportation ➔ Maintenance & Repairs
Often overlooked is a clogged radiator. When warmed up, use a heat sensor gun to check for even temperature through the radiator core. If you don't have access to a sensor gun, palm your hand over the entire core for even heat flow. If cool spots are felt, then coolant is not flowing throught some of the tubes. Sometimes a reverse flush will help, otherwise the radiator will have to be rodded or replaced.
PS Also did your tec check your fan for pulling air thru the radiator toward the engine?
2006-09-16 14:53:14 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Take this car to a radiator shop before something really goes wrong. Sounds like you need a lot of things tested. First is the thermostat, a thermostat when it is bad will not open or will not open all the way next is the radiator, if the fins on the radiator are loose the radiator will over expand (radiators are made to expand to a certain amount) and this will cause the car to over heat, a cloged radiator or a cloged heater core can also cause a car to over heat or make the temperature rise very fast and fluctuate. A radiator shop can test the cooling system (thermostat, radiator, rad cap, heater core and the head gaskets with a pressure tester) The mechanic that installed another fan on the car did not help you.... All he did is what is called a quick fix, and if you live were it snows you are going to have trouble... If you have the 2.8 or 4.3 motor (6 cyclinder) in this car I would bet it is a head gasket leaking or a clog in the system. These engines were known for cloging problems if the system wasn't periodicly serviced... What you can do is go to the local parts store and buy a new thermostat and a flush kit for under $20 bucks if you can do a little work your self. Just follow the directions on the flush kit and run water thru the system with a garden hose.. My family owned a radiator shop for years and I have seen many times if you are not getting good heat that the heater core is cloged and the temp will rise, the car will over heat and the temp gage will fluctuate..
2006-09-16 23:16:57 · answer #2 · answered by ftyatb 1 · 1⤊ 0⤋
make sure the new rad cap is the same as stock, also Adding another fan (in your case is not necessary).Did you or he check the oil? Look at the stick and check if it's milky, or check your overflow tank and look inside that.
You may have a cracked head or blown head gasket. Or it may be possible that your thermostat is stuck in the closed position. Check with another mechanic.
2006-09-16 21:43:59 · answer #3 · answered by Stoner 5 · 0⤊ 0⤋
have the radiator flushed and install a new thermostat .
also did he check to see if the sensor for the fan comes on when it gets hot? if he rigged that extra fan hes not that good.
2006-09-16 21:56:46 · answer #4 · answered by hackstudio 4 · 1⤊ 0⤋
if you recently flushed/changed the anitfreeze, it might have air in the system. it is causing a vapor lock, where the coolant isn't circulating because the air gets into the water pump or something like that...
2006-09-16 21:39:36 · answer #5 · answered by forjj 5 · 0⤊ 0⤋
If he put another fan on to keep it cool hes not that good... Go to this site sign up its free find your car and post the questain add as much detail as possible...
www.automotiveforum.com
2006-09-16 21:30:29 · answer #6 · answered by rapid57702 4 · 0⤊ 0⤋
blown head gasket
2006-09-16 21:53:46 · answer #7 · answered by Anonymous · 0⤊ 0⤋