20-49. CYLINDER HEAD REPAIR (CONT).
Avoid contact with steam. Steam can cause burns, blindness, and other serious injury.
Ensure the wearing of protective aprons, gloves, and safety goggles when using live steam or
injury to personnel may result.
Drycleaning Solvent (P-D-680) is TOXIC and flammable. Wear protective goggles, face
shield, and gloves; use only in a well-ventilated area; avoid contact with skin, eyes, and
clothes, and do not breathe vapors. Keep away from heat or flame. Never smoke when
using solvent. The flashpoint for Type II Drycleaning Solvent is 140 degrees F (60 degrees
C) and Type III Drycleaning Solvent is 200 degrees F (93 degrees C). Failure to do so may
result in injury or death to personnel.
If personnel become dizzy while using cleaning solvent, immediately get fresh air and
medical help. If solvent contacts skin or clothes, flush with cold water. If solvent contacts
eyes, immediately flush eyes with water and get immediate medical attention.
Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only with
effective chip guarding and personal protective equipment (goggles/shield, gloves, etc).
Failure to comply may result in injury or death to personnel.
Use extreme caution not to scratch or nick cylinder head or damage may result to cylinder
Scrape excess gasket material from cylinder head.
Thoroughly steam clean cylinder head.
Clean cylinder head with drycleaning solvent.
Dry cylinder head with compressed air.
Fuel is very flammable and can explode easily. To avoid serious injury or death, keep fuel away
from open fire and keep fire extinguisher within easy reach when working with fuel. Do not
work on fuel system when engine is hot. Fuel can be ignited by hot engine.
Clean all cylinder head components with diesel fuel and dry with compressed air.
If cracks are visible in cylinder head, do not use Pressure Test Method.
Inspect cylinder head for cracks using magnetic particle and fluorescent penetrate inspections (located in
General Inspection) before pressure testing. These inspections will locate exterior cracks. Replace
cylinder head if any cracks are detected.