Now I'm craving a mc chicken and fries, you could have used a different napkin in the pic lol. From what I've read the engine replacement isn't a big deal to put up with. I'd use the replacement program and get a new engine, also were you setting your engine to bdc and using after run oil. It's just a thought, but using the wrong glow plug could of caused it for sure if it was too long into the cylinder. I don't know the plugs that your using so I don't know if the depth is different. I hope you don't give up on the truck man they are good rc's.