Question about 2004 Chevrolet Malibu

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Problem with the water pump

Problem with the weather pump

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Need more detailed information of the symptoms.

Posted on Apr 17, 2014

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What is the exact problem?

Posted on Apr 17, 2014

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Car will not start

If the the car cranks and won't start it could be many things. Fuel pump is likely. If the timing belt is broken you would hear sounds from inside the engine you really don't want to hear. If you have more than 60K miles on a timing belt, it's good you replace it anyway and do the water pump, oil seal, and tension pulleys at the same time to save yourself some money.

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If the pump isn't leaking and you can see water flowing in the radiator with the cap off, the pump is probably OK. Can you figure out where the coolant leaked out?

Sep 06, 2010 | 2002 Dodge Stratus

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What must be removed to replace the water pump on a 1998 bmw 528i?

Not much really. I did my son's on the road in 20 degree weather. Remove the fan nut 1.250" wrench...left handed thread with the special tool. Remove fan, and shroud at the same time. Remove belly pan so you can drain the radiator. 16mm socket and 1/2 socket wrench to move the idler pulley tensioner. You move it not remove it. You move it enough to release serpentine tension. Remove belt. and 4 bolts holding the water pump pulley. Now the water pump is exposed. remove the bolts or nuts holding it in. go get some 6mm x 30mm hex bolts and use them to pry out evenly the water pump. That's it. reassemble, don't forget the o-ring.

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My 99 cavalier is overheating i have changed head, gasket, radiator, fan, and have no thermostat, is it absolutely necessary to have one in the system

During the summer, you can run without a thermostat without any significant problems. In cold weather however, having no thermostat will prevent your car from warming up to normal operating temperature in a reasonable period of time, which will put additional stress on the engine and reduce your gas mileage substantially. You will also get virtually no heat to the passenger compartment. Two things you should check in regards to overheating: Is your water pump working and does your radiator fan switch on when the temperature rises above @190 degrees? If the vehicle has over 100,000 miles on it, you might as well replace the pump now. Don't use a rebuilt pump. They are ****. Get a new pump and a good quality thermostat. If the fan doesn't come on when it should, you probably need an new fan switch/sensor. These are inexpensive and easy to replace. Also check for signs of damage to the wiring leading to this sensor, and check the fan fuse and relay. Finally, make sure that your antifreeze mix is no more than 70% antifreeze to water for winter weather, or 70% water to antifreeze in summer. 50/50 is a good bet for year-round reliability, but a higher % water will tend to cool the engine more efficiently. Having said all that, I suspect your water pump is the main problem. If you notice a slow drip of coolant near the pump, you can be almost certain it has failed.

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it sounds like the radiator is starting to get pluuged, i would pull it out and have it checked & cleaned, its an inexpensive place to start.

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2 Answers

Fuel pump not running only in cold weather

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