Do you have an Audi S4 oil leak? Does your Audi S4 have a burning oil smell? We've noticed in our own service repair facility that the Audi S4 V6 30 valve 2.7 liter can develop oil leaks as the car gets older and advanced in miles. This page endeavors to simplify the difficult task of diagnosing Audi S4 oil leaks, especially on these engines. If you are getting ready to spend money on the repairs associated with having different seals, gaskets, and hoses replaced, please read this page addressing Audi S4 oil leaks.
The Four Most Common Audi S4 Oil Leaks
- Audi S4 Oil Leaks - Cam Chain Tensioner Gaskets and Seals
- Audi S4 Oil Leaks - Valve Cover Gaskets
CLICK HERE for our detailed and illustrated page that focuses on these Audi valve cover gasket leaks.
- Audi S4 Oil Leaks - Camshaft Seals and Plugs
- Audi S4 Oil Leaks - Front and Rear Crankshaft Seals
If your vehicle has in excess of 100,000 miles on it, the oil leaks may be linked to a blocked crankcase breather hose system.
What causes Audi S4 oil leaks?
Many Audi S4's have a rough service history. We consider 'rough' to be irregular oil changes, extreme hot or cold climates, a lot of short driving where full engine temperature is never reached, and excessive low RPM city driving. This produces a great deal of condensation and moisture to form within the engine, causing a build up of sludge. Many owners have bought an Audi S4 without knowing the oil change and driving history. If you own or have bought an Audi S4 with over a 100,000 miles that has oil leaks, the crankcase breather system should be treated as suspect. If you remove the valve cover and see a lot of resinous accumulation in the valve train area, this indicates that the vehicle already has heavy amounts of oil sludge build up throughout the engine. Suspect number one is the Audi S4 crankcase breather system.
Years of rough service history as mentioned above, cause contamination to take place inside the engine which clogs the Audi S4 crankcase breather hose system. Due to this blockage, the air flow generated within the engine crankcase is restricted and will not allow the system to breath properly. When the engine is running, pressure builds up in the crankcase and causes oil to push out and leak from the weakest parts of the engine.
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