Re: how do i change the sump on my audi a6 2.8 quattro
Remove the large plastic body panel under the engine, if it is still there. The oil pan is about 14in x 12in square with a round sensor in the middle. Drain the oil, disconnect wires, remove all 20 or so bolts. Clean gaskek surface and silicon new gasket in place. replace the bolts, but only hand tight. Let the silicone set for 2 hours, and then tichten to factory spec, about 15in/lbs
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the first thing is to determine exactly where the oil is coming from. If it is a sump gasket at the rear main area it will be easier to do that than pulling the transmission and flywheel to do it (if it is not the main seal) Next is it gear oil - reddish or if manual smells different to engine oil. IT auto and is reddish it may be an oil cooler line or a front seal in the torque converter. I am saying that if it is a rear main seal it will be a big job so make sure before you get involved.
a rubber one,should be changed at 50-60,000 miles. Audis recomendation is like 90,000 I think but have heard of them going much sooner than that. A preventitive Cam -timing belt job way cheaper than doing it after it breaks and ruins valves and cylinders!
is the pan loose or tight? if it's loose, but won't come down, it could the oil sump hung up on the windage tray, the windage tray goes between the pan and the block, it has a hole in the tray for the oil sump to fit thru, the tray is to keep oil from splashing on the crank, hope this helps