In previous articles I’ve described how engine oil can build up in your intake manifolds of your Aston Martin DB9 due to malfunctioning PCV valves (made by Ford of course) and how the PCV system is supposed to work.  In another article, I have covered what parts you would need to order to deal with this, and it included two (2) options; Option 1 is the lowest cost and just swaps the PCV valves themselves, and; Option 2 is my recommended option that swaps the Vacuum Harness Assembly, which happens to also contain the PCV valves.   This article will cover both options. Continue reading “How to Replace the PCV Valves in an Aston Martin DB9” →