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My A4 Cabriolet 2004 has started being really noisy when it starts up in the cold, once it warms up is is ok but the whirring noise is worrying me that something serious may be wrong

No warning lights

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  • Angela Muscat
    Angela Muscat Dec 18, 2014

    Thank you Walt. We topped up the mineral hydraulic fluid and this resolved the problem. Many thanks



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The easiest thing to check which might have these symptoms is the power steering pump fluid. With the vehicle NOT running locate the power steering cap and remove it carefully. Notice if any fluid drops off the tube that is attached to the cap. There should be a few drops. Exam this tube carefully because it shows how much fluid is in the pump reservoir. If there are no fluid on the tube you don't have enough fluid. If there is some fluid look to see if there is enough fluid. You will need to add the right kind of fluid so see the owner's manual, look online or ask someone at an auto store for help. Add some fresh fluid if necessary a little at a time and recheck the fluid level until it is above the bottom line. Run you vehicle to see if that fixed the noise. Now it may also be that the fluid is so dirty and old that this could also be the problem. When you first take the off carefully examine the color of the fluid. It should not be black nor smell badly. It should be red or clear and should smell like an auto product but not burnt or foul. If its dirty, you can replace about 7-8 ounces at a time by removing the old fluid using a turkey baster, discard the fluid safely and replace the same amount you took out but up to the bottom line on the cap tube Drive your car and then repeat (may take 8 times or so) until the fluid has a nice color and smell. You could do this during the week and use the vehicle as you normally would. you don't have to make a special trip each time you do this. Make sure you have enough new steering fluid - do not run the vehicle with low fluid. Good luck.

Posted on Dec 14, 2014

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Thighten the alternator belt also other belts and change oil on steerind pump to syntetic , use belt dresing , check the pulleys bearing and alternator bearing.

Posted on Dec 15, 2014


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