more info please - what is your quirk? if its just going through glow plugs, maybe they are the wrong type.

we would need to know what the engine is doing that makes you think that the problem is engine related.

is it too hot, cold, smoky, crackling noise, using plugs, what type of plugs, what fuel, what % nitro, in hover or fwd flight, does it idle ok, etc etc etc.........

sorry but we need more info to help......