randyrap

I see that the 911SC's have different fuel filters. 78 to 80 and 81 to 83. What is the difference? Will a 78 work on an 83?

My current one is a Mahle KL22.

Thanks in advance ................................. Randy

dial911

The difference is in the threaded fittings that connect the filter to the fuel lines.
Mahle KL22 is correct for your 83.

911S4

A quick way to tell the difference by looking at them is the 78-80 is approx. 2.5" in diameter and taller. The 81-83 is shorter and approx. 4" in diameter. Both year filters have differnt fittings in the top and bottom of the filter.

Noel

This can be quite an ordeal as I found out a couple years ago. Despite the fact that I received a smaller 2.5" diameter filter when I ordered one, the one on my 1980 SC was the larger one mentioned by 911S4. I ended up copying the part number off the orginal one and ordering it from the Porsche dealer. Even with this filter I had to transfer my old fittings from the old filter to make the male/female connection work correctly. It turns out it was one from a 81-83 despite my car being built in late 1979.

Good luck,

Noel

911S4

If I recall correctly the pre 80 filters (2.5")are also for VW applications with Bosch K or L Jetronic Fuel injection. I had a hell of a time finding one for my Euro 79. I ended up with a Bosch part number for a VW (Jetta I believe) and switched the fittings as well. PIA to locate the damn thing through Euro Auto Parts suppliers.