a slight leakage

[hodge776 0]

when printing or feeding the plastic, the heating block leaks on the top and bottom through witch the filament is fed i have tryed tightening the nozel but it does not seem to make a diference. does anyone know how to fix this ?

[snowygrouch 1]

well there are plenty of threads on this already....

But basically you can try some PTFE tape during assembly, followed by extruding some ABS plastic

through it before reverting back to PLA.

[SandervG 1,521]

When your hot end is heated, can you still move/rotate the aluminum heater block?

I suspect you didn't tighten it enough when assembling, leaving some room for movement and leakage.

You could try to tighten it some more with pliers and a small wrench when it is hot.

(when it is cold you won't be able to get it moving).

Is your brass pipe installed the right way?

The wiki hot end has been updated, please look at some pictures to see if yours is the same.

http://wiki.ultimaker.com/Hot_end_v2