The nozzle should snug against the heat break, not the heat block. So as Ward says you should have a thread or two of the nozzle exposed.

The heatbreak has two flat sides where there is nothing attached. You use an adjustable wrench or channel lock pliers to engage those two flats.

Um, no.
I think you mean to reference the heating block, right?
Crescent wrench and a 7mm socket wrench will do the job. Pliers have teeth which will dig into the block, and easily so once heated to 285-295c then tightened. While this may not damage your block beyong use, it doesn't help the cosmetics.

This is where re-reading the steps may help to clarify things. you thread the heatbreak into the heating block until the top of the threads (unthreaded area begins) are flush with the heating block. The tightening makes a seal between the nozzle and heatbreak inside of the heating block. You can "cold tighten" the heatbreak into the heatsink (the upper portion that looks like the hilt of a lightsaber) and just hand tighten it since no molten plastic will ever (dare I say should ever) travel that far up the path.

Hope this clarifies things a bit.

That's not true.

My bad was thinking of the heat block..

Hmm, I followed all those steps including the final tightening.

The final tightening step seems to mention that it will help hold the nozzle in place, but it doesn't mention that that step is used to hold the heatbreak in place.

Thank you for that info! I'll try that step again, maybe I didn't tighten it enough the first time.

The heatbreak has two flat sides where there is nothing attached. You use an adjustable wrench or channel lock pliers to engage those two flats.

The final tightening step seems to mention that it will help hold the nozzle in place, but it doesn't mention that that step is used to hold the heatbreak in place.

Thank you for that info! I'll try that step again, maybe I didn't tighten it enough the first time.

http://wiki.e3d-online.com/wiki/E3D-v6_Assembly

Scroll down to "Final Tightening"

Having an issue with the heater block coming loose from the heat break. The e3dv6 assembly instructions don't mention how to tighten this down. It doesn't really have a surface to grab with a wrench, which is one issue.

As far as I can tell this is causing accuracy issues, especially with the first layer. It's also allowing the heater connections to flex, which could eventually break under the stress.

How do you tighten down the heatbreak?

Thanks!