As well as the pcv fix and valve cover
The engines are actually decent but the plastic cooling breaks over time causing coolant leakage, overheating and then a blown head gasket.
Cruzekits.com for the PVC fix ($80 with a little mechanical work if you are capable).
And zzpperformance.com for the aluminum thermostat. You can spend $300 and buy their pcv fix with a catch can...