at work we have an ms 362. It wouldn’t start and sounded bad on pulling- scraping, rough pull etc. pulled the piston and cylinder, found scoring, replaced both with stens set for this saw. Carb is spotless, everything seems to be in order, but even with the new set up, it doesn’t sound right. A little “clack” sort of sound at tdc. It starts and idles for a second then quits and won’t restart. I believe crank seals are my only thing left unless someone has another idea. Is a leak down test the only way to proceed? Thanks in advance.