TM 9-2815-225-34&P 3-42.  OIL COOLER REPAIR (Contd) LOCATION/ITEM ACTION REMARKS c.  Inspection (Contd) 22. All parts Inspect for cracks, damaged Discard any part where cracks, threads, and excessive corrosion. stripped threads, or excessive corrosion is found. WARNING Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa).  Use only with effective  chip  guarding  and  protective  equipment  such  as  goggles  or  shield,  gloves,  etc. Failure to comply may result in injury to personnel. 23. Cooler core (33) a.  Seal one end and install Do not exceed 30 psi (207 kPa) for suitable air fitting on opposite testing or cooler core (33) will end.  Connect compressed air rupture. supply line and apply air pressure. b.  Immerse in water and observe. Discard cooler core (33) if air bubbles are present. c.  Remove from water and disconnect air supply line and fitting. 3-228