Hey there, I have a sovol sv06 (not plus or ace) and its been great for a few years but recently I’ve changed the hot end and applied thermal paste on it but it keeps leaking in to the filament so the filament doesn’t melt anymore. Any advice and diagrams/pictures that will help me properly put the thermal paste would be helpful 
You only need a small amount of the heatbreak. If your having issues, you either used too much or a paste that can’t withstand the heat.
You can always just remove what you’ve added & see how it works.
Myself, I use NT-H1 paste.
With a genuine Sovol part or something else?
Where did you put the thermal compound? Between the heat element and the block? between the heat break and the heat sync?
Your style hotend requires no heatsink compound UNLESS you have chronic issues with filament sticking in the heat break due to heat creep.
Adding it (if necessary) greatly complicates printer maintenance as the compound must be COMPLETELY cleaned from inside the heat sink EXERY time the heat break is removed. If the heat break is inserted into a heatsink with compound inside it will be scraped off and end up on top of the heat break where it will contaminate your filament.
Compound on top of the heat block is VERY bad. There is SUPPOSED to be a large temperature difference between the block and heatsink. The heatsink cools the top end of the heat break NOT the heater block. The entire reason for the heat break is to thermally isolate the 2 zones. Compound in the air gap between the block and heatsink will force the heater element to work much harder, raise the temperature of the heatsink and CAUSE heat creep.
Newer hot end designs (like the picture @lion shared) give much more separation between the heat block and the heatsink.
@kiito are you up & running again…??
Hey guys appreciate the support! I’ve been pretty busy but I’ll post an update when I get to it as soon as I can!
Thanks for the response! When I first removed the hot end it had some thermal paste on the whole copper part, so I thought I should replace it and add a newer one. The hot end it originally came with started having heat creep problems and clogged up the extruder gears. Now with an oem replacement nozzle should I still try to add thermal grease? Like you said the design shouldn’t need thermal paste unless heat creep right?
Sovol uses a type of glue to the heatbreak threads to keep it from coming loose during shipping…it is not needed.
I’m no expert on the SV06. I do have a SV01Pro that uses the same heat block and nozzle. The heat break is similar but not identical. I would never even consider using thermal compound as there is no way to contain it from spreading to the filament path.
Also the grey paste for computer components is formulated for 100 °C not 250+. The white paste used on the ceramic heaters must be a different formula.
Yeah I used a thermal paste compound sold locally here and heard good reviews from local 3D printing community so I figured I’d try it to prevent the original problem of heat creep
Thanks for the advice guys, I managed to get it up and running.