What causes valves inside a compressor to become smashed? Share your thoughts in the comments below. In this clip, we discuss what smashed valves indicate and why technicians must look beyond the damaged compressor to find the real issue. • Smashed valves signal internal system problems: -Inspect the discharge reeds and valve plate for deformation or impact marks. -Check piston tops and cylinder heads for evidence of liquid compression if metal is distorted or carboned up, it’s likely a slugging