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2001 v6 mustang overheats and ac quits working have replaced water pump,radiator,theromstat still overheats any other suggestions?

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Posted on Jan 02, 2017

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SOURCE: 98 Mustang v6 - no AC

Make sure the radiator pressure cap is the correct one and that the hose is not soft--check the lower hose and heater hoses for softness as well. They should be firm, but not hard or cracking. The temperature sensor is reporting normal operating temperature, so it and the thermostat are working correctly (hot water would blow out of the radiator if it were stuck). Check the cooling fan for free turning and no noise. Check it's grounding connection. Check the fuse box for blown fuses to the fan and to the A/C compressor. Make sure all the relays and fuses are firmly pressed into their sockets. Check the A/C compressor clutch winding for resistance--should not read infinity. Does the blower motor for the heater/A/C run when either is turned on? The A/C switch on the dash may be defective.

Posted on Sep 08, 2009

Testimonial: "Excellent suggestions for diagnostic checks! Thanks!"

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SOURCE: car overheats. have replaced radiator,thermostat.water

Question that I pose is:
Is the car overheating or are you assuming it is as the gauge is telling you that it is?
There are two cheap and simple things that are not mentioned in this post. There is an Engine coolant temp sensor which in all of their innane wisdom Saturn built with a plastic tip and we all know plastic melts fairly easily. This part is a simple fix as it needs a 13mm deep socket and that is it for tools to replace it and it is $10 - $15 for a new on with a copper tip. There is also an Engine coolant temp switch which sends information to the PCM to tell the gauge what the reading should be. Aslo $10 - $15 and a 13MM deep socket to replace. These are common issues with the S Series Saturns. I do however recomend that if you are going to replace them yourself that you empty the radiator of coolant as the sensor and switch are directly in the engine block coolant flow and will give you a nice little shower if you do not at least jack the drivers side up before replacing them.

Posted on Dec 02, 2008

  • 508 Answers

SOURCE: smoke from radiator

I am assuming you are seeing a steam column rising from the outside of the radiator on the passenger side. If this is the case you more than likely have a seam on the radiator leaking. These leaks can be small enough to be hard to detect with the eye. When the coolant leaks out and evaporates from the heat from the radiator it will usually give off a heavy sweet smell. This would defiantly indicate a coolant leak. That is where I would start.

Posted on Feb 07, 2009

  • 316 Answers

SOURCE: Overheating engine

Check your oil dipstick for coolant, or a mucky substance. Your symptoms sound like a blown head gasket.

Posted on Jun 22, 2009

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SOURCE: 1998 malibu cooling problem. over heats, have

thats a big possibility that the water pump is not circulating right.

Posted on Aug 26, 2009

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Check that the water pump drive belt is tight
Check that the cylinder head is not blowing.
Check the impleor on the water pump is not eroded
Check theair flow through the radiator is ok.
Check electric cooling fans operates if fitted.
Are you driving in to low a gear?
Are the brakes draging?
Check to see if you have some contaninated fuel
Check that the correct ignition time is ocurring at all engine speeds.

Best of luck Cliff UK

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Blocked Radiator.Dont try flushing it out as i found it does not always work.Just replace it with a new one.

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