sgtstrev Posted January 21, 2010 Report Share Posted January 21, 2010 1998 S8 Hi has anyone replaced the secondary sump gasket at the bottom of the engine ? Got a bit of a heavy oil leak to the front and right side of the engine doesnt look like the oil cooler or the oil pump drive seal Have already replased the sump gasket about a month ago but to no avail definantly not coming from the head gasket or cam cover as they are all dry my best guess is either this secondary sump gasket which is held in by allen key bolts all the way round the bottom of the engine or the plate behind the oil pump drive pully held in by counter sunk torx screws Any ideas would be appreciated Link to comment Share on other sites More sharing options...
Figure11 Posted January 21, 2010 Report Share Posted January 21, 2010 What do you mean by secondary sump gasket? Part 7? Link to comment Share on other sites More sharing options...
sgtstrev Posted January 22, 2010 Author Report Share Posted January 22, 2010 Hi basically looking at replacing number 8 and 18 due oil leak in this area just wondered if it is possible to drop item 7 without removing the front subframe many thanks Link to comment Share on other sites More sharing options...
Figure11 Posted January 22, 2010 Report Share Posted January 22, 2010 I would guess you will have to drop the subframe to do that. Can be done with a suspension bar or engine hoist. Link to comment Share on other sites More sharing options...
sgtstrev Posted January 23, 2010 Author Report Share Posted January 23, 2010 DOh !!!. okay was hoping to be able to drop it without going there never mind front gasket number 18 is on back order anyway looks like i will have to make my own one. I thought i might have been the only one with a leak in this area but it looks like the dude in audi pages has done his one . Noticed in the pictures of the oil cooler removal instructions (last photo) that his had sealent all around the joint of the secondary sump not alone then..... Link to comment Share on other sites More sharing options...
BW2309 Posted January 24, 2010 Report Share Posted January 24, 2010 To replace 8 is simple but does need the subframe dropping (obviously careful as the engine and 'box are supported fully by the subframe!) but 18 is the timing case seal. This needs all front off, crank main pulley removal and is quite big job. I have never had to replace one of these unless doing a rebuild anyway. Unlikely to be leaking from 18. Be sure the leak isn't leading you astray, oil can track in some funny directions! Most common leaks on the '8 V8 are cam cover gaskets (caused by blocked breather system) and lower sump gasket. Cam cover leaks can run very thinly down the front and sides of the block and build up around the sump making it look as though it's fresh from that area! Link to comment Share on other sites More sharing options...
sgtstrev Posted January 25, 2010 Author Report Share Posted January 25, 2010 Hi many thanks for the advice attacking it tommorow will let you know . replaced the cam cover gaskets about six months ago will do the secondary sump gasket first hopefully that will cure it Just did not want to go back in there later to find that the front flange gasket was actually leaking too has anybody got some good pics of the breather hose system and what pipes to clean etc Link to comment Share on other sites More sharing options...
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