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For reference and searching, this is a 2007 US spec Audi S8 D3 with 137,000 miles, daily driver.
Have an oil leak coming from under the intake, so finally got the courage to pull it. Oil was literally pouring out, so didn't have much choice. Found lots of carbon and pieces of plastic on top of some intake valves.
Plastic on top of valve. Mmmmmmm carbon. Some more. And more.
So now the decision becomes, fix the oil leak and put it back together. Or.....do intake, injectors, valve cover gaskets, plugs, coils, carbon clean, etc, etc.
Last edited by 3RDGENFRANK; 03-05-2018 at 04:15 PM.
Reason: Added model, year, and mileage.
Yes, spend the money and do everything. Very easy right now. I took everything apart, replaced all gaskets and parts except fuel injectors. And now I have a bad fuel injector, so I get to do it all over again!
Yours looks exactly like how mine looked, oil everywhere.
I just did this job on my S8. I had a misfire on multiple cylinders do to plastic pieces sitting on top of valves. I didn’t do anything to the injectors. So far everything seams to be running smoothly.
Have an oil leak coming from under the intake, so finally got the courage to pull it. Oil was literally pouring out, so didn't have much choice. Found lots of carbon and pieces of plastic on top of some intake valves.
Plastic on top of valve. Mmmmmmm carbon. Some more. And more.
So now the decision becomes, fix the oil leak and put it back together. Or.....do intake, injectors, valve cover gaskets, plugs, coils, carbon clean, etc, etc.
Before. After. After.
Used Berryman B-12 Chemtool full strength to break down the carbon and oil deposits. It works really well, but it will melt gloves, plastic screwdriver handles, etc. I bought a dentist style pick set from Harbor Freight that works well for getting around the valves and in crevices. Parts should be here Tuesday. I found my Fine Oil Separator/PCV valve was leaking along a seam, so still have to order it. Was going to get rebuilt injectors from JH Motorsport, but they had none in stock. Rock Auto has OEM Hitachi's for $93 each.
Anything else I should replace since I've got it down to this level? Already doing intake, oil filter housing gaskets, valve cover gaskets, plugs, oil separator, injectors, and valley pan gasket.
Before. After. After.
Used Berryman B-12 Chemtool full strength to break down the carbon and oil deposits. It works really well, but it will melt gloves, plastic screwdriver handles, etc. I bought a dentist style pick set from Harbor Freight that works well for getting around the valves and in crevices. Parts should be here Tuesday. I found my Fine Oil Separator/PCV valve was leaking along a seam, so still have to order it. Was going to get rebuilt injectors from JH Motorsport, but they had none in stock. Rock Auto has OEM Hitachi's for $93 each.
Anything else I should replace since I've got it down to this level? Already doing intake, oil filter housing gaskets, valve cover gaskets, plugs, oil separator, injectors, and valley pan gasket.
Do you have part numbers for all these except intake itself?
02-17-2018, 11:29 AM
Well.... removed my intake.
