Question about 1996 Toyota Avalon

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Cooling system My car overheated because of a busted top radiator hose. I changed the hose and the radiator cap which is mounted not on the radiator like most cars but on the engine near where the top hose is attached to the engine. Luckily the overheat condition did not warp any part of the engine nor blew any seals. The problem I am now having is once I turn the ignition on (car not running and running) the temperature gauge pegs out at max hot. I checked to see if the fans were working so I disconnected the temperature sensor turn the ignition on and they are working. I did not recall the fans working while the car is running so I changed the sensor, still no help. I also disconnected the battery in an attempt to rest the system, still no help. The temp gauge only goes to zero with the ignition off, but with ignition on, it pegs out at max high. Any suggestions? PS Don't tell me take it to the dealer. Bad experience but great car. At 275000 miles they told me I needed a new engine. I told them put everything back together, I collected the car and repaired it myself. I am not at 405000 miles and she runs like a bandit. Original transmission, original transmission.

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  • Randy McNamee Apr 28, 2013

    I have the same problem. I have replaced the temp sencer and still the same problem, Gage is maxed with key on or running but not over heating. Did you get any help?

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  • Toyota Master
  • 5,370 Answers

For car running hot and overheating issues, I suggest to you go through this help links.

Click this link below and go through the troubleshooting procedure to take care of the problems: ----



Car runs hot?

http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
-----------

All types of car overheating problems and troubleshooting?

http://technoanswers.blogspot.com/2011/11/all-types-of-car-overheating-problems.html
---------

Car freeze overnight and started overheating while driving?

http://technoanswers.blogspot.com/2012/01/car-freeze-overnight-and-started.html

-----------



Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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Car overheats and Air blows hot at idle?
http://howtobyme.blogspot.com/2011/11/car-overheats-and-air-blows-hot-at-idle.html
--------

overheating?

http://schematicsdiagram.blogspot.com/2011/12/buick-century-overheating.html
----------

Car engine Overheats and transmission starts slipping?

http://schematicsdiagram.blogspot.com/2011/12/car-engine-overheats-and-transmission.html
----------This details will help.Thanks.

Posted on Feb 29, 2012

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  • 2 Answers

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Posted on Jan 02, 2017

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Does anybody have a video link on how to flush the cooling system on a GM 3.1L SFI OHV 6cyl motor? I need a vid for this particular motor cause mine is still overheating & i have looked everywhere.


flushing a cooling system is the same method as any other motor

do it without the thermostat fitted
or water pump opening

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for radiator flush

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why still over heating
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air ..fins bent or some water channels blocked

or possible head gasket leak




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Nov 02, 2016 | Cars & Trucks

2 Answers

Why is my 2001 bmw 325i still is overheating after i changed the water pump, thermostat and purge the system?


Well Michael put your hand on radiator upper hose and then the lower hose right after car warms up and just starts overheating is there a temperature difference if so one of two things is going on thermostat not opening even though it is new or there is still an air bubble in the cooling system if nthere is no difference and still overheating might have to explore headgasket being blown

Aug 05, 2014 | 2001 BMW 325i

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How to correct problem cooling fan working only w/ac tl 3.2 1999 overheating?


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May 25, 2014 | Acura TL Cars & Trucks

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My 2000 durango keep overheating and the hose keeps bursting. the waterpump and various other parts have been changed. The radiator does not have a leak. The pressure in the radiator is said to be fine....


if it has the 4.7L engine they crack cylinder heads and the compression from the engine put air into the cooling system you can buy a tester that you hook up to the cooling system that changes color with exhaust fumes auto parts stores can get it or stock try napa

Jun 12, 2012 | 2000 Dodge Durango

2 Answers

Leak in the radiator hose lower one should i do anything else after changing the hose


1. Turn on the heater controls. Remove the bottom R/ hose entirely and then remove the top R/hose from the radiator end. (If the top hose has not been replaced previously (or recently) then replace it with a new one as well). Then flush the cooling system.

2. Reconnect the new hoses and refill with the correct spec coolant as stipulated by the manufacturer. Do not use anything other than the coolant type/mix specified by the manufacturer. Start the engine and continue to refill the radiator as the level drops. Check and re-check the coolant levels. Make sure you check the overflow reservoir and top up to the coirrect level.

3. You will need to bleed air from the cooling system because air will be trapped and the cooling system will not operate properly with air in it. If you do not know the correct procedure for doing this on your model you will need to have it done by a competent mechanic familair with your vehicle.
Failure the bleed air from the system will result in the engine overheating, due to air locks in the cooling system, and possible expensive engine damage.

Sep 13, 2011 | 2006 Hyundai Tucson

1 Answer

1999 grand prix gt overheating. Changed thermostat, water pump, upper radiator hose. Please help!


does the upper and lower hoses seem to be the same temp when car begins to overheat? ore the radiator cooling fans coming on before the car overheats? did you pressure test the cooling system and radiator cap? also may want to remove the lower hose and flush the radiator. is the check engine light on and does it run bad?

Aug 03, 2011 | 1999 Pontiac Grand Prix

1 Answer

Overheating


CAR OVERHEATING FIRST CHECK FOR LOW COOLANT IN THE RADIATOR COOLANT OVERFLOW JUG.IF COOLANT LEVEL IN OVERFLOW JUG LOW REFILL ADD COOLANT BACK TO THE FULL COLD MARK.PUT RADAITOR CAP ON COOLANT OVERFLOW JUG START ENGINE LET IT IDLE UNTIL IT OPERATING TEMPERATURE.MAKE SURE TOP RADIATOR HOSE GETTING HOT WHILE ENGINE WARM UP.IF TOP RADIATOR HOSE DONT GET HOT WHILE ENGINE IDLING YOUR THERMOSTAT COULD BE STUCK CLOSE CAUSING CAR TO OVERHEAT.IF TOP HOSE IS GETTING HOT.CHECK FOR COOLANT LEAKS CHECK TOP RADIATOR HOSE AND BOTTOM RADIATOR HOSE FOR LEAKS.CHECK FOR LEAKS AT THE RADIATOR CORES AND PLASTIC SIDE CONTAINERS.IF ALL IS GOOD ENGINE OVERHEATING WHILE IN A LONG TRAFFIC LINE, COOLANT FANS NOT COMING ON.COULD HAVE FAULTY ENGINE COOLANT TEMPERATURE SENSOR OR BLOWN COOLING FAN FUSE OR RELAY.COULD HAVE PCM FAULT.MAKE COOLING FAN ELECTRICAL CONNECTORS AND WIRING NOT DAMAGE OR BROKEN.

Jul 17, 2011 | 1999 Oldsmobile Alero

1 Answer

1998 Pontiac Sunfire Symptoms: -Overheating


What are you going by to say it's overheating , temp gauge ? Have you test to see what the actual temp. is > Hook - up a scan tool ,what's the PCM - engine computer seeing for engine temp. ? 223 degress the PCM should turn on the cooling fan . You could buy a Non-Contact Infrared Thermometer With Laser Targeting at harbor freight ! Radiator very hot ????? What is the right temp .
Non Contact Infrared Thermometer With Laser Targeting

Could be a bad temp gauge . Is the coolant surging inside the cooling system ? Does it have a radiator cap ? Have you replaced it ?

May 06, 2017 | 1998 Pontiac Sunfire

1 Answer

How to change the thermostat


For 1999 Oldsmobile Aurora 4.0L SFI DOHC 8cyl check thie how to replace a Thermostat:

Parts:
1. Thermostat

Tools:
1. 3/8 in. Drive Ratchet
2. Needle Nose Pliers
3. Screwdriver
4. Cooling System Pressure Tester
5. Socket Set
6. Radiator Hook Tool

Steps:
Step 1 Open the hood and locate the vehicle’s radiator.
o Tip: Make sure the vehicle has cooled down before inspection.
o Tip: Safety Tip:Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or safety shoes.


Step 2 Remove the vehicle’s radiator cap and use a radiator pressure tester to check for leaks.

Step 3 Drain out some of the engine coolant in the radiator so the coolant level is below the thermostat housing to prevent leaking when replacing the thermostat.

Step 4 If necessary, remove the upper radiator hose.
o Tip: A twisting motion may help to initially break the upper radiator hose loose. You can also use a flathead screwdriver to help pry the hose off. Make sure not to damage the hose.

Step 5 Remove the thermostat housing bolts.

Step 6 Remove the thermostat housing.

Step 7 Remove the thermostat.
o Tip: Make sure to note the way the thermostat is installed. Installing the thermostat backwards will affect how the cooling system performs.

Step 8 Clean the mounting surfaces. Install the new thermostat as it was removed and always use a new thermostat gasket.

Step 9 Reinstall thermostat housing and tighten mounting bolts evenly. If applicable, reconnect the upper radiator hose.

Step 10 Refill the cooling system with coolant.

Step 11 Start the vehicle with the radiator cap off and allow the engine to run for several minutes. This allows the air bubbles to escape the cooling system.

Step 12 Reinstall the radiator cap.

Step 13 Run the engine until up to normal operating temperature. Remember to keep an eye on the temperature gauge to prevent overheating.


Hope helps (remember rated)

May 31, 2010 | 1999 Oldsmobile Aurora

2 Answers

How do I replace a radiator on a 2002 maxima


Nissan Car 350Z & Maxima 1999-06 Radiator - Removal & Installation

  1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
  2. Drain the cooling system.
  3. Remove or disconnect the following:
    Negative battery cable Coolant reservoir tank and bracket Upper mounting bracket Upper radiator hose Oil cooler lines, if equipped Lower radiator hose Cooling fan and condenser fan Fan motors and shields Radiator

To install:
  1. Install or connect the following:
    Radiator Fan motors and shields Cooling and condenser fans and torque the bolts to 44 inch lbs. (5 Nm) Lower radiator hose Oil cooler lines, if equipped Upper radiator hose Upper mounting bracket Coolant reservoir tank and bracket and torque the bolt to 44 inch lbs. (5 Nm) Negative battery cable
  2. Fill the cooling system to the proper level.
  3. Start the vehicle, check for leaks and repair if necessary.
WARNING Do not remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine coolant escaping from radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter of a turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Drain the cooling system.
  3. Remove or disconnect the following:
    Negative battery cable Coolant reservoir tank and bracket Upper mounting bracket Upper radiator hose Oil cooler lines, if equipped Lower radiator hose Cooling fan and condenser fan Fan motors and shields Radiator
To install:
  1. Install or connect the following:
    Radiator Fan motors and shields Cooling and condenser fans and torque the bolts to 44 inch lbs. (5 Nm) Lower radiator hose Oil cooler lines, if equipped Upper radiator hose Upper mounting bracket Coolant reservoir tank and bracket and torque the bolt to 44 inch lbs. (5 Nm) Negative battery cable

  2. Fill the cooling system to the proper level.
  3. Start the vehicle, check for leaks and repair if necessary.
WARNING Do not remove radiator cap when engine is hot. Serious burns could occur from high-pressure engine coolant escaping from radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter of a turn to release built-up pressure. Carefully remove radiator cap by turning it all the way.
240ef5f.jpg

Fig. Exploded view of radiator and components
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Drain the cooling system.
  3. Remove or disconnect the following:
    CAUTION Do not damage or scratch the A/C condenser and radiator core while removing.
    CAUTION Because A/C condenser is onto the front-lower portion of radiator, moving to rear direction should be at minimum.
    Negative battery cable Engine cover Air duct and air cleaner case assembly Bracket mounting bolt for anchoring A/C piping Reservoir tank and bracket Upper and lower radiator hoses Radiator cooling fan assembly On A/T models, A/T fluid cooler hoses. Plug hoses to avoid leakage Cover, then two A/C condensing mounting bolts located in the upper part of the radiator Rotate two radiator upper mount brackets 90 degrees in the direction shown in the illustration and remove fce8147.jpg

    Fig. Removing A/C condensing mounting bolts

    d3c8f50.jpg

    Fig. Rotating radiator upper mount brackets 90 degrees

    edb9f67.jpg

    Fig. Removing radiator
  4. Remove the radiator by performing the following:
    CAUTION Lifting A/C condenser should be minimum to prevent a load to A/C piping.
    With lifting and pulling radiator in a rear direction, disassemble lower mount from radiator core support center. Lift A/C condenser up and remove radiator after disengaging the fitting as front-bottom surface After removing radiator, put A/C condenser on radiator core support center to prevent a load to A/C piping, and temporarily fix it with rope or similar means

To install:
  1. To install, reverse removal procedure.
  2. Check radiator cap for any leaks.
  3. Start and warm up engine. Check for engine coolant leaks and A/T fluid leaks.

Hope this help (remember comment and rated this).

May 12, 2010 | 2002 Nissan Maxima

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