A real easy way to check if your AOS is leaking is to try and remove the oil filler cap with the engine idling - if the cap is difficult to remove, ie there is a vacuum holding it closed, there is a good chance that you have an AOS replacement in your near future....
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2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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