Quote:
Originally Posted by DarkPira7e
Whenever I've used AN fitting, I don't tighten them much. If you're putting any force into tightening it, it is more prone to leaking in my experience.
Do not use PTFE tape
Just make them a little snug and allow the system to put pressure to them. After a few warm/cool cycles, make them a little more snug. I've even gotten Mishimoto AN fittings to hold this way
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I have tried everything from just past snug, to way tighter than they should ever be and I get the same seeping every damn time.