Chinese diesel heater - burning rubber gasket (smell and smoke) SOLVED

On how to repair the problem of burning rubber gasket smell and smoke on Chinese diesel heaters.
The blockage of air circulation because a poor manufacture/quality control make the exhaust port overheat and burn the rubber gasket.
Just unblock with a screwdriver and a little file to make it perfect.

[@pjanke2]

Sure enough mine had the same defect....thanks man!

[@krytycznymoment9457]

mine (Vevor 2KW) doesn't have any of these holes...

[@critical_awareness7587]

Yeah those vevor brands aluminum housing is total junk. Hiles filled in, chunks of housing missing, defects hanging off and aluminum oxidation spots everywhere. Bad fuel line, bad clamps, they changed the mother board so you can just order a replacement part easily as their glow plug has 2 prongs while the others have 3.
A total scam company.