Hello guys, I bought a 92 Sierra 1.8TD with pretty high miles and it was standing for a few years but the car looks like an amazing first car project, the owner was kind enough to say that t he car had trouble starting at winter due to low compression, could someone who knows a bit more then me about that engine tell me if they have some usual "illneses" that would cause that, and should I change to make sure that the car will be reliable in the future?