Audi A6 + RS6 (1997 - 2004) - 98 1.8T A6 AEB oil leak after new filter

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Sun 5 Oct 2008 16:10
98 1.8T A6 AEB oil leak after new filter - Peter D
I changed the oil and filter today after some difficulty removing the old filter fitted by Audi at 40K now 49K. New filter fitted new Edge 5-30 oil and fired her up. Sptooed a small leak. On closer investigation it was not coming from the filter seal but from the seal between the oil cooler and the oil filter retainer. I can only assume the cooler moved when removing the tight filter and has damaged the seal. I will have to wait till tomorrow obtain a new filter as it is Sunday today. Anyone else had this. ??? Regards Peter

Edited by Dynamic Dave on 05/10/2008 at 20:59

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Sun 5 Oct 2008 16:21
98 1.8T A6 98 AEB 1.8 T oil leak after new filter - jc2
Try tightening the cooler block;it normally has the same type of seal and retention as the filter.
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Sun 5 Oct 2008 16:46
98 1.8T A6 98 AEB 1.8 T oil leak after new filter - Peter D
Thanks jc2 I looked at that but the retaining nut is only tightened to 25 Nm to really just keep it in place and the oil filter itself is 20 Nm by hand and bears it's load against the cooler pulling on the same shaft at the cooler nut. I need a new seal tomorrow before I attack it again. Regards Peter
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Sun 5 Oct 2008 17:27
98 1.8T A6 98 AEB 1.8 T oil leak after new filter - Peter D
I'm starting to wonder if the super tightened filter thanks to Audi has distorted the cooler thus a normally tightened filter allows the upper seal to leak. When I finally get the filter to move it took at least one and half turns before you could undo it by hand. I wonder how much a new cooler costs. Regards Peter
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Mon 6 Oct 2008 15:06
98 1.8T A6 98 AEB 1.8 T oil leak after new filter - Peter D
Problem solved. The oil cooler had rotated whilst removing a seriuosly tight oil filter fitted by Audi and the large 'O ring with a couple of location tabs had moved and and was weeping oil. The location tabs were distorted due the the rotation of the cooler. The old seal was quite hard and some surface perishing. £3.10 for a new seal and all is well. Regards Peter
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