Cant create engine in engine build

[Crill]

Hello, unfortunately when ever i play the game, i design the car, get everything ready and go to engine builder and cant create an engine i choose the type of engine i want and nothing appears, the background seems to vary each time i load it as well, sometimes everything will be there, and other times i notice objects that were in the background before have disappeared i doubled checked the visibilty slider incase i was bein stupid but nope nothing, any help would be great cause a wanna get addicted to the game again lol.

Cheers

[Crill]

I eh, hehe, forgot to choose the amount of cylinders, sorry bout that might help tho if someone gets stuck lol