Hi all well I just replaced the clutch master cylinder on my tr3 and the line that goes in the back has a very slight leak. I was trying this morning before work to tighten it down some but could not get a good fit with a wrench. The nut is actually pretty tight. It looks like it needs that famous quarter turn before it breaks. When I get home, I will pull the inspection plate off the back and try and get some more tightening down on it. The line is old and the cylinder is new, so perhaps the flare on the line is not sealing. My question is do people use something like Teflon tape or some other product on hydraulic lines to seal them at the threads. Probably not, I think the seal needs to be metal on metal?