So, while disassembling my extruder, the spring on the front shell launched itself into oblivion and cannot be found. Would anyone with a K2 be willing to put some calipers on the spring in their extruder so I can find a replacement? I noticed that creality sells a whole front shell replacement kit, but it would be nice if I could save a little bit of shipping time and just get the spring on amazon or something.
Thanks
John k2 extruder dimensions is 0.6x6x15mm
You can order it on amazon
sourcing map Compression Springs (0.6x6mm OD,15mm Free Length) 10Pcs, 304 Stainless Steel Extension Spring - for Shop Home Repairs, DIY Projects, Silver Tone https://amzn.eu/d/jefx4ph
Tips you dont lost it again glue a spring on clip side so it will not fly when you service the extruder again in the future.
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Awesome! Thanks a bunch!
Any tips on replacing it after it pops out? I thought I lost mine but ended up finding it. I just am having a hard time getting it back in.
Ensure you have put the spring in the locator and against the outer body and while at that angle (there can only be one angle if located correctly) pull back against the spring and push down at the same time. Practice makes perfect.
I use two hands. Left to control the spring end, the other to push down at the wheel end.
Oh yea, happened to me last night; really pissed me off. They do not show that as a possibility in their help videos. Thank Goodness I found it on the floor of my mess. They that sure was a pain in the ass to get back together. I figured it out before I found a video to show you how to put that spring back it to place. I was cursing at this printer again!
I also lost a spring in space somewhere (and later found it in a shoe halfway across the room) so I ordered 10 from amazon at these dimensions… they are to weak, they barely grip enough to even feed 1.75 PLA… so I re-ordered 10 at 6mm OD x 8mm x 15mm … these seem to work well.
thank you 1st time opening extruder if I hadn’t seen the spring in videos I wouldn’t have known it existed since dealing with clogs is now part of life creality should improve the design or we’ll be losing springs every time
Very much appreciate the posts.
I ordered K2 Plus Extruder Front Cover
I also ordered the springs mentioned by the OP. Because RobertM mentioned they are weak I thought I’d have a play with weak springs and TPU. He also mentions 6mm OD x 8mm x 15mm I think he meant 0.8mm. Since I have both a brand new spring and the weak springs I made a quick image and grabbed the calipers to check. Measuring an actual length of a compression spring is always a challenge but the Creality spring is smaller than 15mm technically but it was in the mech at purchase so it is most likely slightly deformed. The wire diameter is definitely 0.7mm on the original. The pitch is considerable larger on the Creality spring as seen in the image. The hole where the spring sits measures just over 6mm so that is the maximum size.
Annoyingly the image on the Store site for the front cover shows what appears to be some sort of pressed in plug that holds the spring in place. I may have to investigate printing something like that (if you have a link that would be awesome) or I may check Clark Foam Rubber here in Australia and see if they have something that would suffice. Basically it is just a spring keeper. Would be very useful. Have seen a post that had a nut and screw setup but the nut would have to be put in with a nutcert to the ones I have and I’d prefer not. 
Anyway TLDR…
15mm long
6mm Outside Diamter
0.7mm Wire Guage
Amazon has them
The best will be order of the extruder cover at AliExpress it available for order., When you lose PTFE connection (it will happen), you will have a new one and gears with new bearings also! 
Will look into that. I did order my springs from AliExpress but a lot of people get freaked out using the Chinese sites so I link to the Amazon one. Ironic I know considering their Creality machine came from China. 
I ordered my Vacuum bags and pump direct from AliExpress as it worked out s lot more economical and was the same product. 
Crazy isn’t it.
But definitely thanks for the heads up on the tube. Currently my nozzles are blocking and that is doing my head in. 
