Question about 2000 Audi A6

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Audi a6 2.8e keeps over heating the fan on the first speed does not come in.The water is pushing out the cap.Did replace the water pump,pressure cap,fan switch,bleed the system no air in system

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  • Audi Master
  • 2,122 Answers

Sounds as if the cylider head gasket may have blown. If the engine oil has changed to a grey colour, thats the problem. Even if the oil hasn't changed I'd suggest a cylinder compression test fromyour friendly motor machanic

Posted on Oct 02, 2010

  • Riaan de Jager
    Riaan de Jager Oct 02, 2010

    head gasket were replace and heads skim and presure tested

  • First thing I noticed, is you don't say anything about replacing the thermostat....That would be high on my list of first actions. remove it from its housing and check operating temp. and then get water to that same temp if you can and lower it in to see if it opens. May be safer and easier to get new one. Also check the temp. sender units. There will be either two or three, one for the guage, one for the computer and one for the fan. The fan may be controlled via the computer, so if you can't find three you know why, but have a good look just in case, check that the radiator isn't blocked either internally or by rubish from the outside. The condencer will also need to be inspected for contamination. That's the radiator in front of the cooling system rad. Did you tourque to correct settings and use correct sequence? I think that those heads may need a basic setting and then a further ninety degrees rotation.

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Why is my 1993 Audi 90cs overheating?


There are dozens of possibilities from as simple as a bad pressure cap or low coolant level to as bad as a cracked engine block. Knowing the conditions that cause the overheat would help diagnose, here's some basics--assuming the coolant is full. Only overheats at low speed is generally an airflow problem: fan not running because of a fuse, relay, temperature switch, or dead fan motor. Only overheats at high speed is generally a coolant flow problem: radiator is plugged up, faulty thermostat, water pump vanes damaged. Tell us anything you've checked, any recent repairs done, and the conditions under which it overheats.

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take the top off the filler cap run engine to boil. keep it full off water to the top. you will see air bubbles coming out as the engine gets hotter. squeeze the pipes on the rads to help the air come out. when fan kicks in turn engine off and leave to cool down.while you are doing this make sure the fan for heater is off but is on full heat. can have fan on number one on speed that is fine.

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Audi a4 1997 keeps overheating after bout 10miles (raises upto 100-110 degrees) Checked fan and still working and water circulating fine so could u provide any support in whats causing the problem?


can be loosing water or not holding pressure[coolant bottle or cap],top gasket,crack in block,oil cooler leaking into coolant,faulty heat gauge or sensor.hope this helps

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My 99 alero v6 is over heating not leaking ight mite be hoses or thermostat . or head gasket but when it overb heats the smoke comes from the top of the engine


REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.IF CAR OVER HEATING WHILE IN MOTION.MORE LIKELY ITS THE THERMOSTAT,LOW COOLANT IN RADIATOR OR COOLANT SYSTEM,BAD WATER PUMP,WATER PUMP WEEP HOLE IS LEAKING, WATER PUMP NEEDS REPLACING.CHECK ENGINE OIL,IF OIL LOOKS LIKE MILK SHAKE YOU HAVE LEAKING HEAD GASKET.IF CAR IN PARK AND OVER HEATS WHILE IN A LONG TRAFFIC LINE OR.BANK DRIVE THROUGH COOLANT FAN NOT TURNING ON, BECAUSE THE ENGINE COOLANT TEMPERATURE SENSOR FAULTY.CODE SCAN CAR FOR FAULTY COOLANT FAN RELAY OR FAULTY PCM. CHECK COOLANT FAN FUSE, AND HOT WIRE THE COOLANT FAN TO MAKE SURE ITS WORKING.IF COOLANT FAN DONT WORK WHEN HOT WIRED. COOLANT FAN NEEDS REPLACING. REPLACE BOTH RADIATOR HOSES, REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP.BUY NEW COOLANT ADD 50/50 WATER AND COOLANT.IF ENGINE OIL HAS ANTIFREEZE IN IT.REPLACE ENGINE OIL AND OIL FILTER TO KEEP FROM LOCKING UP THE ENGINE.GET CAR FIX.DONT KEEP DRIVING IF IT KEEP OVER HEATING,ENGINE DAMAGE WILL OCCUR.I HOPE INFORMATION I GAVE YOU WILL FIX PROBLEM.PROBLEM COULD BE LEAKING RADIATOR HOSES BUT CHANGE THERMOSTAT THATS FIRST THING I WOULD CHANGE BECAUSE IF IT CLOSED, ENGINE WILL OVER HEAT AND CRACK CYLINDER HEAD OR CRACK PISTON, COOLANT NEED TO CIRCULATE THROUGH THE ENGINE TO TAKE AWAY THE HEAT FROM ENGINE.

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1 Answer

Over heating


CHECK COOLANT LEVEL IN RADIATOR. BUT WAIT UNTIL THE ENGINE COOL DOWN. CHECK WATER PUMP.IF YOU SEE COOLANT LEAKING FROM WEEP HOLE REPLACE WATER PUMP. REPLACE THERMOSTAT AND RADIATOR PRESSURE CAP WHEN CAR OVERHEATING IF CAR AT A STANDSTILL IN LONG TRAFFIC LINE OR MOVING SLOWLY.COOLANT TEMPERATURE SENSOR FAULTY.NOT TURNING ON COOLANT FAN.CHECK COOLANT FAN FUSE AND RELAY.IF ALL IS GOOD.HOTWIRE COOLANT FAN.IF COOLANT FAN DONT COME ON FAN MOTOR FAULTY.IF FAN COMES ON CHECK ELECTRICAL WIRE CONNECTOR FOR DAMAGE WIRES.

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1 Answer

My MR2 is getting a lot of pressure built up in the cooling system. It pushes the overflow tank's water out through the overflow hose. i replaced the thermostat and i keep adding water into the radiator...


Hi,
I just was reading this and had a few thoughts for you:

1. Is it possible the thermostat is installed backwards? That's an easy fix.
2. Is the radiator fan working?
3. If the pumping action from the water pump seems normal yet the engine still wants to heat up, it's possible that the radiator is clogged-up.
4. Worst case... If with the radiator cap off, the coolant literally blows out of the opening... and the engine has really heated up recently... you may have a blown head gasket. If you suspect this, have the oil drained for inspection of coolant in the oil and don't run the engine anymore. A major fix would be required.

Hope some of this helps you. Good luck!

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Why does my cadillac 1998 deville keep overheating?


Overheating can be numerous things: Fans not working, water pump, thermostat, overflow cap, and the list keeps going. When the engine is running and heats ups, feel the heat of the top hose, if the hose isn't hot, the thermostat is most likely stuck open and needs replaced. If it is hot we know you have circulation. The cap on the expansion tank may be defective, if it can't hold the pressure of the water, it will release at the overflow cap if the cap is bad. Also check the coolant level.

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