u/BithrowawayRx

Long story short, used car dealership sold me a truck in December that apparently had a cracked head gasket. Didn’t know when I bought it, found out 60 days later when the heat stopped working. Took it in, they discovered the cracked head gasket and recommended we go ahead and do the timing chain while they were in there. Got that done, now the engine has this ticking/sewing machine sound it didn’t have before (sound in video). They couldn’t figure out what is causing it. Truck runs fine, just this constant noise when it’s on. Any ideas what could be causing this or what else I could have done to fix it? Thanks!