Thank You, I will start changing the engine oil every 5,000 mile interval. I do it myself so the cost is minimal $75.You're talking about the high pressure fuel pumps (there's one on each bank) that are mechanically driven by the intake camshafts. Take off the engine cover and you'll see them. They're expensive - $554 on FCP Euro, $361 on Rock Auto. Replacement doesn't look too difficult but the catch is you're dealing with extremely high fuel pressure when engine is running. A fuel leak on top of the engine caused by incorrect replacement would be bad news.
Because these pumps are mechanically driven what I recommend is more frequent oil changes than Porsche's 1 year/10,000 mile interval. Cut that in half and use A40-qualified oil. Your engine will appreciate it. These pumps are controlled electronically though, and from what I've read that's the more common failure point.
If a HPFP fails (I think dual failure is unlikely unless fuel rails are clogged with debris) the engine goes into limp mode with accompanying dashboard notice. The in-tank electric fuel pump is capable of supplying fuel for reduced power.
CO2 evaporates and is rated for BC which is fuel and electrical. You're thinking ABC dry chemical fire extinguishers which are a mess to clean up.SomeGuy, I would refrain from using a CO2 on any vehicle fire unless that was all I had available. Cleanup would be difficult at best. I have 5 and 10 lb. HALON's strategically placed around my garage and 2.5 HALON's in all our vehicles. Also have a few of the new ELEMENT 50 fire extinguishers as well.
This is a DFI engine and it operates differently. This engine has a low pressure (approx 5 bar) pump in the fuel tank. Its main job is to supply fuel to the two HPFPs (one on each bank). Those pumps are mechanical and the pressure to the fuel rails is regulated according to demand. When the engine is shut off fuel pressure is removed.I don’t know the correct Porsche procedure but if I was replacing I would either locate fuel pump fuse or relay and remove. Then start motor, it will stop when it has no fuel pressures remaining, or very little pressure.
Or wrap a rag around fitting to be loosened to catch fuel, there won’t be much volume of fuel released. Use compressed air to disperse fuel / fumes.