New Lft Tensioner line Leaks at Compression Fitting

[grant lyon]

Exchanged left tension line with new new line from Pelican, but it still leaks at the compression fitting behind the distributor - same location as previous line replaced about 2 years ago. Torqued to ~7 Nm leaks; then ~10Nm still leaks. What now?
'76 2.7 with Carrera Tensioners.

Potential coining at compression ferrule? Found the new line has shorter length vs. previous line. Too tight to loosely hand tighten at compression fitting and then locate fitting at cam end of line. Had to loosen compression fitting end to ~2 turns engagement to allow slack to fit cam end bolt and washers. Tightened cam end 1st, then tightened at compression end. Wondering if tension in rubber pipe could have caused the ferrule to be oriented incorrectly, or cause the ferrule to not seat at same contact circle I may have formed by original weak hand tightening.

Fitting in case looked OK with no cracks or obvious deformation.

Any kind of jointing/gasket compound OK at the ferrule?
Tighten further? (Hesitant, as the prior compression fitting got much much worse when I tightened up a bit to try to stop leak.)

[R_Builder]

Did you just buy that line (930-107-347-10) from Pelican within the last 2 weeks, or so? I just returned mine as it was too short to install properly... it would connect the dots (barely) but there was just too much tension in the rubber section for me to feel comfortable. I think the new lot of these lines they got at the end of June are not made correctly...

Any burs on the adapter piece that threads into the case? That seat needs to be nice and smooth to seal up with the fresh ferrule...

[grant lyon]

R,
Thanks for the info -- I may have proved your concern about recent lot 930-107-347-10-M20 length being suspect/incorrect.

I bought it this past Monday 07/11/11, and yes the rubber section had to stretch when I tightened up the compression fitting.

At first I installed the compression side loosely hand tight and I couldn't get the cam side out and over the cam fitting. I had to loosen the compression side, then turn in ~ 2 turns of engagement, to provide clearance to get the cam side fitting in place. So the rubbers section is short on the order of 2-3 threads worth of pitch of the case side fitting threads.

I'm pretty sure there were no burrs on the case side fitting - cleaned and inspected. Is the case fitting an easy R&R?

[R_Builder]

Well, that's 2 strikes against the new batch of lines! In comparing the new one to others I had on hand, what I saw was that they "missed" the bend geometry outboard of the rubber line section and connection point for the drop line to the tensioner itself. They are hard parts to compare because of all the twists and bends, but that is what I saw. That, and all the lines appear to now be zinc plated instead of the familiar yellow cad plating...

The adapter(s) on the case side are a simple R&R (as long as the threads in the mag case stay nice and you have removed enough parts to gain good access to them)... they are just a union that adapts the straight threads in the case out to a flared fitting to work with the cam line ends. Use a new sealing ring between the case and the adapter if you decide to R&R them.

[JFairman]

i don't know what they are currently stocking and selling here but make sure you are buying oem porsche oil lines, not aftermarket.

[dhagood]

i had an oil leak in the same place on my 84 carrera recently, and was forced to replace both oil lines to get a good seal. i believe both the compression ferrule and the socket deform to make the seal. once that deformation has taken place, it is extremely unlikely to be able to seal again.

also, be advised that the design of these parts has changed and the old parts have been superseded. the part numbers i required were 930-107-347-09-M20 for the line the connects to the chain tensioner and 930-107-347-10-M20 that goes from the engine centerline to the driver's side cam tower.

this particular joint is now leak-free. it doesn't even weep. i wish i could say that about the rest of the engine