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Luuk Liesdonk
(@luuk-liesdonk)
New Member
Heater cartridge loose fit heaterblock

Greetings all:

I have a small issue with my Prusa MK3s+.

I was replacing my heater Cartridge, thermistor and heaterblock after wrecking them while cleaning a failed print.

The new parts (all original Prusa parts) came in and while installing the new heater cartridge it was a pretty loose fit.

The screw started to strip and i can't get it tighter but it falls out when hold sideways. There is nothing to find on this issue and i dubble checked if i got the right parts. 

Any help and tips are welcome!

Posted : 11/08/2022 11:34 am
Diem
 Diem
(@diem)
Famed Member

Are you following:

https://help.prusa3d.com/guide/how-to-replace-a-hotend-mk3s-mk3s_161575

Check from step 9

Cheerio,

Posted : 11/08/2022 1:23 pm
Luuk Liesdonk
(@luuk-liesdonk)
New Member
Topic starter answered:
RE: Heater cartridge loose fit heaterblock

No, i am not following those instruction since they are about replacing an whole new hotend and i am having issues with the heater cartridge specifically. As in i am assembling a new complete hotend.

Thank you for the reply tho.

Posted : 15/08/2022 12:26 pm
RandyM9
(@randym9)
Reputable Member
RE: Heater cartridge loose fit heaterblock

The screw started to strip and i can't get it tighter but it falls out when hold sideways.

If I’m not mistaken, the thermistor is ‘pinched’ in its slot by that screw.

If you have a small drill and tap, you can gently drill the threads out and tap new threads for a nominally oversized screw. You’ll also have to drill an oversized hole for the screw clearance (before you tap the new threads) where the screw first enters the heater block.

The heater block is aluminum so this should be pretty straightforward.

Posted : 16/08/2022 4:20 am
Diem
 Diem
(@diem)
Famed Member

In that case see:

https://help.prusa3d.com/guide/how-to-replace-a-heatbreak-heaterblock-heatsink-mk3-mk2-5_14944#15704

Cheerio,

Posted : 16/08/2022 11:53 am
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