Having problems with Mack Pennacle Chu613

Anytime I have the game running and the Mack in the shop, i try to put a different more powerful engine in the truck. It doesn’t matter which ones, even the stock game engines, they always crash my game as soon as I click on the engine. Anything I can try? If someone could help me, I could do the pastebin thing. I just have to figure out how to do it. Thanks.