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BoxsterGT BoxsterGT is offline
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Join Date: May 2004
Location: Stow, MA & Ashland, NH
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Porsche Crest

Here are the typical Factory CIS Polyamid fittings as used on the early 911SC & on some flex lines of the 930..............

They are M12 Banjos at the FD with a M12 Female at the Injector. The Banjo Bolt is M8x1.00 thread pitch. Barbs on the tube end are one-way. Once inserted they will not rotate or come apart. If they rotate they have failed. Only way to separate them is with heat, as in melting the plastic. No other way is possible for risk of damage to the actual barb.

The original lines having a rubber sheath are not hose but Polyamid tube with a rubber coating that is no longer available in this size.

The aftermarket lines above in post #11 show a crimp sleeve and a crimp next to the fitting. It may have a unique type of banjo designed for this method of securing the tube. However, trying to clamp the Polyamid tube is not effective, and the barbs are not designed for soft rubber hose & any kind of clamp, even the good Oetiker ones.

Hope this helps.


Last edited by BoxsterGT; 05-15-2014 at 02:50 AM..
Old 04-27-2014, 02:28 PM
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