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Anonymous
Anonymous Posted on Oct 30, 2017
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I have an 2005 v6 mustang. I changed my water outlet housing, because it had cracked on the side. But after changing that now my coolant fans won't come on unless I am running the a/c. Can anyone point me in the right direction. O by the way, u also changed my thermostat, and coolant temp sensor and the fans still aren't workiing

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Jeff Armer

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  • Ford Master 15,575 Answers
  • Posted on Oct 30, 2017
Jeff Armer
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Is it over heating ? Hooking up a scan tool that can view sensor data to see what the PCM - engine computer see's as far as what the temp is . The PCM turns on the the fans . The fact that when you use the A/C an the fans come on ,tells me the PCM is controlling the fans .. The PCM will turn on the fans when engine temp.reaches 213 degress .

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Anonymous

  • 651 Answers
  • Posted on Jan 06, 2009

SOURCE: fan won,t run on 2000 Ford Contour

fan motor may be bad. also could be a sensor. you can jump the fan motor off of the battery to see if it works.

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Anonymous

  • 4088 Answers
  • Posted on Sep 08, 2009

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.

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

Anonymous

  • 317 Answers
  • Posted on Nov 08, 2009

SOURCE: Son has a 1997 contour with 2.0l overheated

hard to get to and difficult job...are you sure you dont have cracked head? is there water in the oil....does the oil look milky? look in the radiator is there oil residue in the coolant........

robert wales

  • 4977 Answers
  • Posted on Jun 21, 2011

SOURCE: My 2005 mustang engine water is overflowing and

the fan not coming on unless you turn the a/c on is a clue.this tells you the fan is working but the coolant sensor for the fan operation may not have been the one you changed(as there is one for the dash gage/light and one for the computer to turn on the fan).also the fan relay may be the problem not turning the fan on without the a/c on.

Anonymous

  • 9 Answers
  • Posted on Aug 11, 2011

SOURCE: 2001 mustang...6 cylinder. Car overheats

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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Related Questions:

0helpful
1answer

Remove water pump
Inspect/Test/Replace
  • When replacing a water pump, it is necessary to drain the cooling system.
  • Any components--belts, fan, fan shroud, shaft spacers, or viscous drive clutch--should be removed to make the pump accessible. Some pumps are attached to the cylinder block as shown below.
f11-60.jpg Installing a water pump. Courtesy of Dana Corporation.
  • Loosen and remove the bolts in a crisscross pattern from the center outward.
  • Insert a rag into the block opening and scrape off any remains of the old gasket.
WARNING When working on the coolant system (for example, replacing the water pump or thermostat), a certain amount of coolant will spill on the floor. The antifreeze in the coolant causes it to be very slippery. Always immediately wipe up any coolant that spills to reduce or eliminate the chance of injury.
  • When replacing a water pump, always follow the procedures recommended by the manufacturer.
  • Most often a coating of good waterproof sealer should be applied to a new gasket before it is placed into position on the water pump.
  • Coat the other side of the gasket with sealer, and position the pump against the engine block until it is properly seated.
  • Install the mounting bolts and tighten them evenly in a staggered sequence to the torque specifications with a torque wrench. Careless tightening could cause the pump housing to crack. Check the pump to make sure it rotates freely.
  • The water pumps on many late-model OHC engines are driven by the engine's timing belt. When replacing the water pump on these engines, always replace the timing Test/Replace

    CAUTION
    If the radiator is filled to the top with coolant and the engine is run without the radiator cap in place, the coolant will expand and spill over as the engine warms up.

    • Drain some coolant into a clean container until the coolant level is below the thermostat housing.
    • Remove the upper radiator hose connection from the thermostat housing.
    • Loosen the housing bolts and remove the housing.
    • Remove the gasket and scrape it carefully from the surface of the housing and the mounting surface on the engine. If the gasket remains on either of the surfaces, there will probably bea coolant leak after reassembly. Some engines use a rubber O-ring to seal a thermostat housing.
    • Compare the size of the thermostat to the old one. They are of different sizes, types, and temperature ratings.
    • The temperature rating is stamped on the sensing bulb on the bottom of the thermostat. The temperature bulb faces the block.
    • When replacing a thermostat, be sure that the thermostat fits into the groove in the block or outlet housing. If the thermostat is installed upside down, the engine will overheat.
    • Install the gasket.
    • Reinstall the thermostat housing. Refill the system and run the engine or pressure test to check for leaks.
    • When the engine has reached operating temperature make sure the thermostat opens.
    • You should be able to see coolant circulating within the radiator.
    • Another way of checking thermostat operation is to feel the top of the radiator hose or use a thermometer or multimeter with a temperature probe to confirm that the coolant is warming up.
    • If the engine is overheating, but the top hose is still cool to the touch, the thermostat is stuck closed and must be replaced.
    NOTE When a paper gasket is used and the recess is in the thermostat housing, it is a good practice to position the thermostat into the recess and glue the gasket to hold it in place. If it falls out of its groove during installation, the outlet housing can be cracked or a coolant leak will result. Before tightening the water outlet housing, try to rock it back and forth to be sure it is flush. Housings are often cracked during this step. belt.
  • Make sure all pulleys and gears are aligned according to specifications when installing the belt.
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Jul 29, 2012 • 2001 Ford Mustang GT
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I have an 05 v6 mustang and I just replaced the water outlet housing. Because it cracked on the side and water was coming out the back of the housing. Now my coolant fans won't come on, only when I run...
Take it to your local dealer or authorized mechanic and have the vehicle scanned to determine potential fault.
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Jan 20, 2018 • 2005 Ford Mustang
0helpful
1answer

Diagram of how to change a water pump for a 1997 mustang v6
On the 97 V6 you'll also need a puller to remove the power steering pulley as this bolts to the water pump housing. This is unusual. Doing this now actually. You can rent the "puller" at autozone. Remember to disconnect the battery and drain the coolant before you get started. The rest is in the Haynes. It'll take time, but its not a hard job with the right tools.
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Feb 10, 2012 • Cars & Trucks
1helpful
2answers

2005 Nissan Sentra overheating. Changed the water pump. Did a radiator flush. What else could it be??
Some thing too check:
Make sure coolant level is up to line and clean (not dirty, do to clogged radiator, may need to be flushed or replaced).
Make sure air flow through the out side of radiator is clear (dirt, leaves, ect..) .
Make sure fan is working properly equip t (is not running too slow). Or Manual (belt driven) fan clutch is working properly, not loose or spinning too freely?
Check for broken or cracked fan blades itself.
Check radiator cap, (no gasket tears).
Could be thermostat going bad ?
Could be coolant temperature sensor/switch (from computer) going bad?
Check radiator hose(s) (too soft, may collapse)?
In some rare cases:
Timing could be off.
Could be water pump.
Could be blown head gasket(s).
Could have cracked head(s).
ECT..............Hope this was some help???


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Jul 25, 2011 • 2005 Nissan Sentra
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1answer

My 2005 mustang engine water is overflowing and boiling I've changed the termosthat and cooling sensor as well as the radiator is not clogged up. The fan doesn't kick in unless I turn the ac on any...
the fan not coming on unless you turn the a/c on is a clue.this tells you the fan is working but the coolant sensor for the fan operation may not have been the one you changed(as there is one for the dash gage/light and one for the computer to turn on the fan).also the fan relay may be the problem not turning the fan on without the a/c on.
Read full answer
Jun 21, 2011 • 2005 Ford Mustang
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1answer

Temperature swings. I have a '96 mustang 3.8L V6. When leaving in the morning and the engine is heating up, the temperature guage will swing over almost to the 'H', then swing back almost to the 'C', then...
Make sure all the air is bled out of the cooling system they are bad about air being traped.There should be a bleed around the thermastat housing crack it open let engine run until normal temp and steady flow of coolant then tighten up and top off with coolant.
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Sep 13, 2010 • 1996 Ford Mustang
0helpful
1answer

2005 Dodge Stratus Coolant Outlet Flange
The water outlet housing if installed properly, shouldn't leak. The only way to build up too much pressure would be for the thermostat to be stuck closed. I would find out where the leak is coming from before I went any further. Use the bleeder screw in the housing to bleed the air out of the system.
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Aug 25, 2009 • 2005 Dodge Stratus
1helpful
3answers

My vehicle leaks coolant from an unknown location by the block on a 05' ford mustang. when reving the engine it leaks alot more rapidly.
Check your water outlet housing. It's plastic, the thermostat sits on top of it.
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Jul 10, 2009 • 2005 Ford Mustang
6helpful
1answer

I have a coolant leak in my 2005 Ford Mustang from behind the thermostat. What is causing this?
I just had this happen to me we had to replaced the whole thermostat housing because its plastic it cracked no explanation why but the crack was in the very back leaking down towards the waterpump .
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May 09, 2009 • 2005 Ford Mustang
1helpful
2answers

1998 mustang gt coolant leak
I just had the same problem. Ford design the intake manifold with plastic water crossover which cracks. The coolant will leak onto the top of the block and and then down the back of the engine. This intake design is a known defect and was ocvered under by Ford for 7 years past the date of mfg. The crack either is in the crossover or the thermostat housing. I happed on this when I found the same leak and traced it back to the thermostat housing. I changed the thermostat, but it leaked worse. You can pickup a aftermarket for $200 and it's about 4-6 hr job to replace.
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Oct 18, 2008 • 1998 Ford Mustang
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