Question about 1998 Volvo S90

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Temo gauge went all the way up and i just had a radiator replaced .....

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  • sunnysings Nov 13, 2009

    the fan stayed on after i shut the car off

  • Brad Brown May 11, 2010

    What is the fluid level in the radiator? Did this happen soon after the replacement or were you able to drive for a while? Did you do any of the work yourself? What was the fluid that was put in the radiator?

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Change the thermostat, and check and see if the radiator cooling fans are working.

Posted on Nov 13, 2009

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1. Check the electric fan in working condition. If it is ok but not turning when engine is hot, check the cap of expansion tank. If there is steam escaping, pressure is lost and fan will not work. Overheating will set in.
2. Recommendation when replacing a new radiator, it is best to replace the hoses and the thermostat at one go.

Posted on Nov 25, 2009

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I drive a 2006 dts which i've had for 1 year. A week after I had the car the temperature gauge went to red when I was in traffic. I took it to cadillac, they replaced the engine,radiator and hoses


Temp is going up, well that doesn't mean anything unless it actually overheats, in traffic it can reach 240 F and present no danger of engine damage. If this is not the case DO NOT DRIVE THIS UNTIL THE PROBLEM IS FOUND AND REPAIRED UNLESS YOU WANT TO BUY ANOTHER ENGINE JOB.

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2004 Ford Explorer Sports Trac overheating. I cant find anything that shows any signs of leaking. I've changed the thermostat twice, flushed the radiator and also changed the clutch in the fan to...


Did the engine overheat before the water pump was replaced? If so, you may have a warped cylinder head and/or blown head gasket.

Was the radiator full of rusty-colored liquid before you flushed it? If so, your radiator is probably restricted with rust deposits in the cooling tubes. Flushing WILL NOT get this stuff out. The radiator MUST be replaced if this is the case. Your heater core is probably not in real good shape either, so you should be expecting some heating problems this winter.

If the above is not the correct answer, then you should check to make sure the temperature gauge is not "LYING" to you. This could be caused by a defective gauge, a bad temperature sending unit, or faulty wiring.

The way to check this is with a scan tool that can read engine data and an infrared thermometer. While reading the coolant temperature data from the computer, check the cylinder head temperature with the infrared thermomometer. The readings you get should be within 5 degrees (F) of each other. If the computer data does not match the thermometer within the 5 degrees, then the sending unit for the computer should be replaced.

Then look at the gauge to see if the gauge reading is appropriate to the temperature readings that you took. Normal operating temperature is between 190 and 230 degrees. This should place the gauge at slightly to the right of center to about 5/8ths of the way to HOT. If the readings you took are OK and the gauge is reading higher than this, then you should try replacing the temperature sending unit for the gauge and see if that fixes the problem.

Please note that there are TWO temp sending units: One for the gauge and one for the computer.

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1998 Toyota Corolla radiator heats up (gauge goes full) every time I turn on the AC Fan for 5 to 10 minutes. This is happening with or without AC on. This model has Fan seperate from AC which gets turned...


Most overheating problems are caused by a stuck closed thermostat, if it has already been replaced the next common cause is a clogged radiator, have it checked at a REAPIR SHOP OR RADIATOR SHOP IF YOU REMOVE IT YOURSELF

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1995 Volvo 850 Overheating


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The temp gauge on the instrument panel was


Sounds like the radiator is clogged, have the cooling system flushed, the water pump pumps water into the engine and it comes out the top hose to return to the radiator to circulate through it to cool, if the radiator is clogged the water pressure will build on the top hose, also look at the bottom radiator hose, if it collapses when you rev the engine the radiator is clogged, although sometimes the bottom hoses are reinforced with wire to prevent them from collapsing so just because they do not collapse it does not mean the radiator is not clogged.

Mar 01, 2010 | 2000 Jeep Grand Cherokee

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Temp gauge goes high. Radiator leak just the


It could well be a faulty thermostat- test or replace same.
Could also be a blocked radiator core, - check coolant or airflow is not restricted,
Ensure any radiator leaks are repaired,
Ensure coolant level is correct, without airlocks - bleed as necessary on re-fill,
Check operation of cooling fan - ensure fan runs at appropriate engine temperature - if not check sensor switch and associated relay operation.
Thermostat is located at the end of top radiator hose where it connects to engine housing.

Aug 10, 2009 | 1995 Jeep Grand Cherokee

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Coolant sytem


The fans should come on at 232 degrees, 3/4 of the gauge, or with the A/C on for a minutes. It has a coolant level sensor on the radiator that is bad about going out. It is a little hard to change, but it costs about $40 from GM, or you can just unplug it. It is on the passenger side of the radiator with a two wire connection. Good Luck

Jun 05, 2009 | 1998 Chevrolet Lumina

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