OK, I give... how the heck does the "heater feed" fit back into the fitting on the head on a 602? I put a new o-ring on the line, and it slips into to fitting -- a nice, tight fit -- but it will NOT go in far enough for the original clip to hold it in place. It's not going anywhere, but it needs to go another 1/8" or so for the clip to slip into the recess that it I'm assuming it needs to fit into. I have tried and tried to pry it into place, but it's hitting something and just won't budge any further. I can feel it hitting (feels like metal on metal), and there's just no more give. Am I nuts, or is this thing this much of a PITA for everyone? I gave up after a couple of hours dinking with it and am just going to hope it stays put and is water-tight. In my frustration I broke the clip anyway, and will need to order a new one. Grrrrr...

Thanks all!

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1992 300D 2.5T
1980 Euro 300D (sadly, sold)
1998 Jetta TDI, 132K "Rudy"
1974 Triumph TR6
1999 Saab 9-5 wagon (wife's)