1992 lexus es300 5 sp i had a water pump put on it when i first purchased it, started over heating the hydrolic fan are not turning fast they are turning very slow, took thermostat out what could it be ? no water is mixed with the oil? didnt drive car a year before this happened, replace radiator, hoses also

bad fan relay or temp sensor

it is located on the bottom of the radiator

Without looking at what's going on we'd only be guessing . Don't know if it's over heating for real or just a temp gauge problem . Or if the cooling fans are not coming on . Sorry , but it doesn't sound like you know what's happen . Your best bet ,take it to a qualified repair shop.

Do you have any leaks in your cooling system any where?

check to make sure the radiator is nut air bound check to see at what temp the fan comes on and check to ,make sure the fan belt is turning the water pump// 1st watch to see for air bound look in the raider fill cap watch for it to drop // 2nd if you can see the antifreeze is moveing//3rd if the fan doesn't come on you need a new temp sensor switch

Below are the tools used to loosen the fan/clutch from the water pump. Similiar tools can be purchased at harborfreight.com or at some large auto parts stores. The large tool can be attached to a breaker bar. It is positioned over the four water pump pulley bolts while the wrench tool turns the fan nut. It's a bit awkward but works. Good Luck!

Problem is not your radiator--unfortunate for you. It's more likely the water pump. The water pump pumps the water around through your radiator to be cooled and then through the engine block to cool your motor. Before you go tearing the water pump out though, you may want to check to see if your fan belt is in good condition and working properly because the water pump works off of the fan belt turning the pulley to pump the water around. If the fan belt is off that pulley, it may need to be put back on or re-routed correctly to start pumping the water.

Then if that is not your problem, the water pump will probably need to be replaced. I believe it can be accessed from underneath the engine compartment, but first you will have to take the tension off the fan belt and remove the belt, then loosen the bolts around the front of the water pump. Put a catch pan under the car though because all your water/antifreeze will come gushing out. That water pump should be available at your local AutoZone or another auto parts store for around $100.

LOOK UNDER THE HOOD. AND CHECK FUEL LINES FOR LEAKS. YOU PROBABLY HIT AGAINST FUEL LINES WHILE REPLACING THE WATER PUMP.YOU NEED TO FIX FAST.FUEL LEAKS IS DANGEROUS.

If the cooling system has no bleeder valves to vent air, you may have to temporarily loosen a heater hose to get all the air out of the system...Also check to see if there is water in the oil...If there is water in the oil then it could have a head gasket problem..Did you ever replace the thermostat? If it is stuck then it would also cause overheating...Excessive exhaust backpressure because of a clogged catalytic converter could also cause overheating..Also check belt tension and condition. A loose belt that slips may prevent the water pump from circulating coolant fast enough and/or the fan from turning fast for proper cooling...Another thing it could be is a faulty Water pump -- Any wobble in the pump shaft or seepage would call for replacement. In some instances, a pump can cause an engine to overheat if the impeller vanes are badly eroded due to corrosion or if the impeller has come loose from the shaft. The wrong pump may also cause an engine to overheat. Some engines with serpentine drive belts require a special water pump that turns in the opposite direction of those used on the same engine with ordinary V-belts... Also check the Fan -- With mechanical fans, most overheating problems are caused by a faulty fan clutch, though a missing fan shroud can reduce the fan's cooling effectiveness by as much as 50% (depending on the fan's distance from the radiator) which may be enough to cause the engine to overheat in hot weather or when working hard.

Did you ever replace the thermostat? If it is stuck then it would also cause overheating...Excessive exhaust backpressure because of a clogged catalytic converter could also cause overheating..Also check belt tension and condition. A loose belt that slips may prevent the water pump from circulating coolant fast enough and/or the fan from turning fast for proper cooling...Another thing it could be is a faulty Water pump -- Any wobble in the pump shaft or seepage would call for replacement. In some instances, a pump can cause an engine to overheat if the impeller vanes are badly eroded due to corrosion or if the impeller has come loose from the shaft. The wrong pump may also cause an engine to overheat. Some engines with serpentine drive belts require a special water pump that turns in the opposite direction of those used on the same engine with ordinary V-belts... Also check the Fan -- With mechanical fans, most overheating problems are caused by a faulty fan clutch, though a missing fan shroud can reduce the fan's cooling effectiveness by as much as 50% (depending on the fan's distance from the radiator) which may be enough to cause the engine to overheat in hot weather or when working hard.