Do we have this on our cars? Havent seen nor read about it. Also not part of the maintenace schedule. I personally think that there should be a filter at least an in line filter for protection of the hpfp and everything else after. Has anybody installed one? Maybe we can share the most appropriate kind for our cars and where could it be placed.

 

You have to much free time - always finding something new to worry about. Enjoy what you have. The 997's and 986's (and others) seem to run just fine with no added filtering.

 

everything does brother until something goes wrong...

 

Fuel filter is intergrated into the fule pump which is located inside the fuel tank. The filter is considered to be a lifetime use part, lifetime of the fuel pump that is. As such it is not considered to be a part that needs periodic replacement.

 

agreed dadio. all in tank electric fuel pumps have a permanent fuel filter mesh on the fuel pickup line. these never need any maintenance. but only in a porsche does it not have a secondary filter before the hpfp for the dfi engines. not sure but i think even the non dfi engines do not have a filter before the secondary fuel pump.

 

Just a point to note about that.
BMW Mini Cooper S series one, ie R53 model, has an intank filter that is normally never changed.
We have had several come into the dealership with clogged fuel filters!!!! Could just be tha fuel here in the UK, but doubt it very much.
Nothing should be a lifetime use!!!

 

My sentiments exactly. Its so much better to have clogged fuel filters than a busted hpfp or clogged fuel injectors. Im sure we can tap a filter somewhere down there.

 

Interesting that the 996 C4 and Turbo, 997 Turbo, GT2, GT3, and RS up to MY '09, all have a replaceable fuel filter. Humm, I wonder why ? Always kind of P's me off to find out that the very same parts that are excluded from Porsche's base cars, and felt to be unnecessary by Porsche engineers, are always included in their high end cars. Would rather replace a $ 50 fuel filter every now and then than find out that my fuel pump needs replacing because the filter is clogged at a cost of God knows how much.

 

Maybe its porsche's way to compensate for the imperfection of the hpfp. They know that hte design is not as robust as the older pumps so they removed the fuel filter so that when the hpfp fails they can always say its the dirt in the fuel and therefor not warranty.

Putting an in line filter seems easy though and can be placed where the gt3's filter is located...beside the coolant tank. The original filter can be placed there and a hose connection fabricated to connect the fuel filter to the hpfp inlet. Now are these fuel filters robust enough not to break down and actually cause the paper element to go into the hpfp? Thoughts... If have a feeling its the hpfp that is why the engineers opted to remove the filter.

 

Maybe...but that doesn't explain why the non-GT1 engines in the 997.1 don't have an inline filter.

 

while I do bekieve filters are a good idea in general I wouldn t mess with the system currently in place.... You have to considers what is engineered into the sysytem already.. Breakdown of filter, fuel pressures etc...???? I d stay away.

 

For info the filter being discussed s prior to the hpfp. Fuel pressure is the same as in any system. The real concern is the possibility of filter breakdown that might introduce contaminants to the hpfp and defeat the purpose we are trying to achieve. But these filter are long lasting needing replacment only after 50k. I would assume the filter media would be durable enough assuming we use the manufacturer recommended filter