Question about 1999 Audi A6

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What's the normal operating temperature for a 2.4 petrol? The 99 A4 I have runs at 90c and gets hotter in slow traffic. Fine on open road.

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Could have a semi blocked radiator , Might pay to get it flushed.
Also check that the Fan/s sre coming on.
Hope this helps

Posted on Jun 30, 2009

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WHAT IS THE NORMAL OPERATING TEMPERATURE ON A 1998 CADILLAC


Assuming engine temperature, a 4.6L northstar engine runs hotter than most other engines in its time. I would say around 210 Fahrenheit, down here in the south, on a summer day, in traffic, I would see it climb to 220. any other specific specification will require a specific question.

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Why does my 1997 Honda Accord temperature gauge rise when the car is idle?


Is the cooling fan operational? you should hear it cutting in, the tank you are talking about is an expansion tank, when the engine gets hot it allows for expansion of coolant, the caps on these tanks can fail they are designed to allow the release of pressure slowly, when they fail the coolant system can over pressure causing the car to run hotter than usual pushing coolant into the expansion tank, when this happens the water pump doesnt operate as designed and ends up slowing coolant flow. To check run the vehicle with the cap loosened and see if the issue continues.

Jul 29, 2014 | 1997 Honda Accord

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Rattling sound when I slow down. Sounds like a bad water pump but the sound stops when I disengage the clutch and stop even though the engine is still running.


The car is over heating. Check the coolant level. Have a pressure test done to check for ;leaks. Have a compression test done to check for head gasket and cracked head/s. Normal operating temperature is between 85 and 95 degrees c and if as you say is 20% hotter then it is boiling

Feb 17, 2014 | 1989 Acura Integra

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Too much time to warm up to 90c on winter, cabin heating is ok after 2km


System is functioning normally at this time, no action is required.

Dec 22, 2013 | 2005 Peugeot 405

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1994 Chrysler Lebaron Convertible In traffic with


If the cooling system is functional, yes.
The ac condenser adds heat to the air coming thru the radiator when the ac is on. If the engine cooling system is weak, the extra heat will make the engine run hot.
Low coolant flow thru the radiator is a common cause.

Sep 01, 2013 | 1994 Chrysler LeBaron

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What does it mean when my temperature gage is cooler than normal?


In most cases nothing, but have your antifreeze tested to see if maybe to much concntrate, otherwise, just keep eye on it and fluids to make don't go the other way.

Jun 08, 2011 | 1999 Honda Accord

1 Answer

When idling my jeep overheats. The cooling fan is running and it speeds up when temperature goes up. The temperature gets close to 260 degrees and the engine tries to stall. when I start moving it cools...


At idling speed an engine does build up a lot of heat and the cooling fan will kick in. In slow moving traffic or traffic jams the temperature gauge can touch the red - particularly on hot days. The reason it cools down when you start moving is because of the air flow through the radiator.

Presumably there are no leaks from the cooling system otherwise you would have mentioned it. In normal circumstances the fan will not be running as you are driving at speed, as the air-flow through the radiator is sufficient to cool things. The fan only kicks in to get rid of excess heat - and this usually occurs at idling speed or after you have parked the car.

If the fan is running all the time as you drive, this points to either a fault in the fan switch, or the car is running too hot. presumably in normal driving the fan isn't running and the temperature gauge reads normal?

It is common - in stationary traffic many cars overheat (particularly big engined models) try to stall and 'cut out'. Restarting can be difficult until the engine cools down.

Is your car overheating in normal driving conditions or just at idle speed? Overheating in normal driving conditions can be caused by things like a failing water pump, blocked radiator, collapsed hose, faulty thermostat or, in the worst case scenario, cylinder head problems.

Overheating at idling speed is 'common'. Check your coolant level. If your car isn't using/losing coolant then there probably is no major problem. You can flush out the cooling system and refill with new coolant - and also check your radiator. Are the cooling fins crumbling with age? Or maybe they're partly clogged with insects and debris from the road? A blast with a hosepipe wil sort that out ..

The question is how much does your car overheat in normal driving? If it doesn't .. it appears as though you have nothing to worry about as such. Most cars have 2 speed fans... the 2nd faster stage kicks in at some point dependant on engine temperature. Perfectly normal.

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1 Answer

2000 A4: notchy gear change when the engine is hot


Check the gearbox oil - has this been changed (with the wrong grade) just before the problem started ? May also be too little oil, from a small leak - which will get very thin when then inevitably overheating. Best to change the gearbox oil, note if lots of sludge or debris comes out (or is attached to the drain plug). If oil is the problem, total siezure may be just down the road.

Sep 07, 2009 | 1997 Audi A4

2 Answers

I have a question about the thermostat of A4...


Are you talking about the thermostat for the cooling system? if so it opens at about 185-195 Deg F.

Jul 17, 2008 | 1996 Audi A4

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