If that's where the freezing occurred and the compression fitting wasn't tight enough.
Thare are a number of things that could cause compression loss, Like bad valve, rings, or the head gasket.
bad pcv valve Blow by
Valve Seals or Valve Train
An exhaust valve(s) staying open upon compression.
yes. a valve in the open position will prevent compression, thus no combustion.
It will not close quickly or completely, on intake it will cause loss of compression and backfiring, on exhaust also loss of compression. There may also be some noise from piston hitting valve, and possible damage.
Maybe a bad valve
Bad are burnt intake or exhaust valve. Pistion rings broken, Burned pistion. Blown head gasket. That is all that would cause no compression are a loss of compression.
Could be--valve not closing completely
Worn valve, bent valve, damaged piston and/or rings, head gasket failure.
Most likely cause is a burnt out inlet valve. You need to do a compression check.
A cracked or broken piston will cause a loss of compression, as will cracked or broken rings. The failure of a head gasket will also cause a loss of compression, as will broken, cracked or badly worn valves or valve seats. A crack in the cylinder itself (either the sleeve or the engine block), or a crack in the head itself will cause a loss of compression. A problem with the plug threads or the threads in the head (for engines that have plugs) can cause loss of compression, and injectors (for engines that have them) can leak around the threads, either because the injector threads or the threads in the head have been damaged.