I don't think the line is cracked due to stress. I think when a friend and I replaced glow plugs a week ago, whe had to remove the intake manifold and so the lines were also pulled out. Upon putting the lines back, maybe the #4 line wasnt seated properly before tightening the nut on the pump causing it to sprung a leak a week after.

Speaking of teflon tape, should u pull the nut up to expose the stopper '=> ' and tape it behind stopper then tighten the nut?

Thanks

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1987 300SDL 314K mi, counting; #22 Head
1999 E300Turbo 405K original miles
1997 E320 180K mi (Son's)
2002 ML320 (Son's)
1998 S320 140K mi (Son's) sold
1985 300SD 311K mi
1984 300D 324K mi (killed by a hit-n-run turd)
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