Would scar tissue left from pleurisy show up on a chest x-ray? also would scar tissue cause recurring chest pain?

Yes: Pleurisy is caused by inflammation of the linings around the lungs (the pleura), a condition also known as pleuritis. It's possible to have developed scarring. It's also possible that there's a little bit of leftover damage still healing itself. It's widespread inflammation, takes some time to heal, and that could cause chronic chest pain or discomfort.