Question about 2000 Ford Taurus

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Refilled the resovoir with coolant now knocking noise

Engine using alot of coolant (no apparent leak), upon refilling the resovoir with 50/50 antifreeze the engine is now knocking and sounds like a diesel engine

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Im very soory to tell you i think that the head gasket went.and the knocking means your motor is no good.

Posted on Mar 11, 2009

  • Scott Clifford Mar 11, 2009

    im very sorry to tell you i think that the head gasket went.and the knocking means your motor is no good.

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Posted on Jan 02, 2017

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1 Answer

Why coolant level in refill tank drops with no apparent leak?


Hi Ayaz
if there no leak detected that means the radiator cap is not holding the pressure, that cause the coolant to travel to the expansion tank and flood out, then when engine cool down, it will suck the coolant back to the radiator and leave the refill tank empty.
Replace the Radiator Cap

Good luck

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How do I burp the coo long system in a Mercury grand marquis


Answer borrowed from BigNslow
Determine the capacity of the cooling system, then properly refill the system at the recovery tank or radiator opening with a 50/50 mixture of fresh coolant and distilled water until it reaches the FULL COLD line on the recovery tank or the radiator is full.

Leave the recovery tank or radiator cap off to aid in bleeding the system.

Start the engine and allow it to idle until the thermostat opens (the upper radiator hose will become hot). The coolant level should go down, this is normal as the system bleeds the air pockets out of the system.

Refill the system with coolant to the proper level.

Turn the engine OFF and check for leaks.

Mar 07, 2015 | 2002 Mercury Grand Marquis

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How do I burp the cooling system in a Mercury grand marquis


Answer borrowed from BigNslow:
Determine the capacity of the cooling system, then properly refill the system at the recovery tank or radiator opening with a 50/50 mixture of fresh coolant and distilled water until it reaches the FULL COLD line on the recovery tank or the radiator is full.

Leave the recovery tank or radiator cap off to aid in bleeding the system.

Start the engine and allow it to idle until the thermostat opens (the upper radiator hose will become hot). The coolant level should go down, this is normal as the system bleeds the air pockets out of the system.

Refill the system with coolant to the proper level.

Turn the engine OFF and check for leaks.

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Heater hose is leaking


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Apr 17, 2014 | 1999 Nissan Quest

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sure,. sounds like a good plan to me.,. you may want to also inspect to be sure it's not broken or otherwise cracked. and fill the the respective level line (when engine is cold or hot). You may be able to simply use a 50-50 prestone blend or full strenght if the existing coolant is low on antifreeze depending upon your needs climate-wise...
Ck

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1 Answer

Knocking noise on my 2001 grand cherokee caused by overheaing


check your transmission level fluid and engine oil level. might be leaking and need some refill. make sure that your thermostat is working or maybe not, check your fan if it is spinning in the right time which your coolant temperature sender sense a very high temperature. or get the lowest temp sender sensor rating.

Jan 13, 2011 | 2001 Jeep Grand Cherokee

1 Answer

Where is the thermostat


Please choose the correct steps for the size of engine that you have:

4.5L & 4.9L Engines
  1. Drain the coolant to a level below the thermostat housing.
  2. It may be necessary to remove the upper air filter assembly on some models.
  3. Remove the 2 bolts securing the upper thermostat housing to the lower housing.
  4. Remove the upper thermostat housing.
  5. Remove the thermostat and O-ring from the lower housing.

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Thermostat installation—4.5L and 4.9L engines

To install:
  1. Install the thermostat and a new O-ring to the lower housing.
  2. Install the upper thermostat housing to the lower housing. Tighten the thermostat housing bolts to 20 ft. lbs. (27 Nm).
  3. Refill the cooling system using a 50/50 mixture of water and ethylene glycol antifreeze.
  4. Start the engine and check for coolant leaks. Allow the engine to come to normal operating temperature. Recheck for coolant leaks.

4.6L Engines
  1. Drain the coolant to a level below the thermostat housing.
  2. On some vehicles, access is easier if the front-end beauty panel and the air cleaner are removed.
  3. Remove the 2 bolts securing the thermostat housing to the intake manifold.
  4. Remove the thermostat housing.
  5. Remove the thermostat and O-ring from the housing.

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Thermostat installation—4.6L Engine


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Loosen the upper radiator hose clamp at the thermostat housing


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Remove the upper radiator hose clamp from the thermostat housing


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Remove the thermostat housing retaining bolts and . . .





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. . . remove the thermostat housing from the engine


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Separate the thermostat from the housing

To install:
  1. Install the thermostat and new O-ring to the housing.
  2. Install the thermostat housing to the intake manifold. Tighten the thermostat housing bolts to 18 ft. lbs. (25 Nm).
  3. Refill the cooling system using a 50/50 mixture of water and ethylene glycol antifreeze.
  4. Install the air cleaner and beauty panel, if removed.
  5. Start the engine and check for coolant leaks. Allow the engine to come to normal operating temperature. Recheck for coolant leaks.

May 23, 2010 | 1996 Cadillac DeVille

1 Answer

Leaks radiator fluid and fans dont turn on


make sure u have enough antifreeze (coolant ) in the resovoir and bleed all the air out of system. do this by;letting engine run till good and warm no t over hot,then stop engine (make sure resovoir is full or a little over full)leave for about 35 to 40 minutes and see if coollant level has droped(it should this is normal) refill and repeat proscess over and over untill the coolant level stops ,u will notice it will take longer and longer for engine to warm up this is also normal then start engine and watch temp ,so it dont over heat,wait for fans to come on if they dont try a coolnt sensor and repeat this over again/thermastat is also some thing u can change(may be when u change coolant sensor/check fan relays and fuses before proceeding with all these remidies

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2 Answers

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Your cooling system is air locked it need need to bleed it. The easiest way is by a 5/8" heater hose T and install it on one of the heater hoses. It make bleeding really simple.

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