DIY: Oil Cooler (scratch built install, lottsa pics).....>.

Originally Posted by Billy830

I would not call them precise fittings, knicks or any imperfections can affect the seal, mostly under high pressure conditions, for which you would use stainless fittings. Aluminium is not considered high pressure and there for should be inspected for knicks or any imperfections(we drop things and aluminum is soft)..... The leaking or weeping at the hose and braid says to me that the hose is not properly installed on the fitting (cut straight) piece of braid has overlapped the hose end or has a bend to close to the fitting that it has distorted the shape of the hose on the fitting and for me I think that that the latter is the main problem with hoses popping off. Aluminum fittings can be over torqued and strip the threads unlike stainless. Snug up the fitting and take 1/4 final turn....Check your routing and clamping make sure that the bends are not severe.

Originally Posted by Modshack

AN fittings do not take a lot of torque to seal completely The design of the fitting cone is precise and should never leak. I'm a bit suspect of the GTM lines. though. One (Tardcore) has bown apart already. They should not leak at the braid. This may indicate they were not assembled correctly. You can take them apart and check but it's awkward to do on the car. Stainless lines have a very high pressure rating normally but if not fully seated in the sockets this could be reduced significantly and potentially leak..