Question about 1994 Acura Legend

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Put radiator in and its still running hot. i figure its my thermostat but someone told me i need to bleed my thermostat. i never heard of that. can u tell me how to put the thermostat in and bleed it

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  • Acura Master
  • 22,246 Answers

Most likely cause on a old vehicle like this is head gaskets ,they perish with old age and disintegrate ,i mean its 15 yrs old and only designed to operate for 10 yrs

Posted on May 28, 2011

  • Andrea Pitt May 28, 2011

    But how do I bleed the thermostat?

  • Colin Stickland
    Colin Stickland May 28, 2011

    you shouldnt need to bleed it just fill rad header bottle then run engine and it will drop level ,then top up and then turn off engine ,allow to cool then top up again and it should be right ,if when warming up engine and it starts bubbling then its the head gaskets ,you will not see oil in water or water in the oil just pressure in the header bottle ,I dont want to sound like a know it all even after 40 yrs repairing trucks and everything else and iam still learning but unless its a 60s vehicle with a copper head gasket then a vehilce 15 yrs old will start suffering from gasket fatigue ,like they need a new wheel bearing or a clutch or when you get old things happen like knees and back pain well motors are no different .

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Hi there I'm looking for some advice I have a Nissan pulsar 2000 no heat from the heater and car keeps overheating while driving I be flushed the radiator and heater core, replaced the thermostat


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Where is the bleed valve located on a 1998 pontiac grand prix 2.8 engine? The auto parts store has never heard of a bleed valve.


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Do I need to bleed the system after replacing the radiator cap?


Definitely recommended - Process is fairly simple, let the vehicle idle and/or reach normal operating temperature - turn the"bleed screw" slightly open and note as the air bubbles escapes from the screw. Also make sure the radiator is topped up with sufficient coolant. Funny enough, the mechanic should have taken care of this process after replacing the thermostat....

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I have a 1999 cadillac deville thats running hot


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Hello! Where is the thermostat located on the 1997 Honda Odyssey? thanks


Follow the lower radiator hose from the radiator up to the thermostat cover. Remove the electrical connector that is on the cover (to the radiator fan switch) and then remove the 2 bolts holding the cover to get to the thermostat.
How to install thermostate:
CAUTION Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.
  1. Note the radio security code and station presets.
  2. Disconnect the negative battery cable.
  3. Drain the engine coolant into a sealable container.
  4. Remove the fasteners from the thermostat housing, then remove the thermostat.
To install:
See Figures 1, 2, 3 and 4
0900c152800b0b85.jpgFig. 1: A thermostat can be tested by placing it in a suitable container filled with water, and heating the water with a hot plate while monitoring the temperature with a thermometer 0900c152800b0b86.jpgFig. 2: The thermostat should open when the water reaches the correct temperature 0900c152800b0b87.jpgFig. 3: The coolant bleed screw is located near the thermostat housing on Odysseys with 4-cylinder engines 0900c152800b0b88.jpgFig. 4: Always install the thermostat with the small pin at the top. The rubber thermostat seal is installed around the thermostat
  1. Install the thermostat using a new seal. If the thermostat has a small bleed hole, make sure the bleed hole is on the top.
  2. Apply an anti-seize compound to the threads of the fasteners.
  3. Reassemble in the reverse order of disassembly.
  4. Set the heater to the full hot position. Set the heater to the full hot position.
  5. On Odyssey models with 4-cylinder engines, locate the coolant bleed valve near the thermostat housing and open the valve 1/2 turn.
  6. Top off the cooling system and overflow reservoir with a 50/50 mixture of a recommended antifreeze and water solution, and bleed the system to remove any air pockets as necessary. Simultaneously squeeze the upper and lower radiator hoses to help push any captured air pockets out of the system.
  7. Inspect all coolant hoses and fittings to make sure they are properly installed and if previously opened, close the bleed valve.
  8. Connect the negative battery cable.
  9. Install the radiator cap loosely and start the engine. Allow the engine to run until the cooling fan has cycled two times, then turn the engine OFF and top off the cooling system as necessary.
  10. Install the radiator cap and inspect for leaks.
  11. Enter the radio security code.
WARNING The manufacturer does not recommend using a coolant concentration of greater than 60% antifreeze. When mixing a 50/50 solution of antifreeze and water, using distilled water may help to keep the cooling system from building up mineral deposits and internal blockage.

This is the original link for more info
http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800b0b84
Please let me know if you need more info. I am here to help.
Good Luck

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On some water pipes there are plastic bleed units. You could also try and bleed the system as follows. Inside the car set the heater to full. Then take the cap off the exspansion bottle. Now run the car and feel for the heat from the heater. Also check the bottle for bubbles. Do not let the engine over heat.

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