Multi-Layer Steel (MLS) Cylinder Head Gasket with Reinforced Combustion Rings and Heat-resistant Coating for Mitsubishi 4D33

• Loss of Power — Poor acceleration; difficulty climbing hills (compression loss reducing combustion efficiency)
• Rough Idle / Engine Misfire — Engine runs unevenly
• White Smoke from Exhaust — Persistent white smoke during start-up or operation (coolant vaporizing in combustion chamber)
• Abnormal Coolant Consumption — Coolant level drops consistently with no visible external leak (coolant entering combustion chamber)
• Milky/Thickened Engine Oil — White foam on dipstick or oil filler cap (coolant mixing with oil)
• Engine Overheating — Temperature gauge reads high consistently (combustion gases leaking into cooling system, causing air pockets)

• The cylinder head gasket is a critical component of the combustion chamber sealing system — failure leads to compression loss, power reduction, and potentially catastrophic engine damage
• Recommended to replace cylinder head bolts simultaneously (must use new bolts)
• Must be installed with correct torque and sequence as specified in the workshop manual in stages (must use torque wrench)
• Cylinder head and block sealing surfaces must be thoroughly cleaned and inspected for warping or scoring
• For 100% accurate fitment, please provide VIN (Chassis Number)

IMPORTANT: The cylinder head gasket is a critical component of the combustion chamber sealing system. Improper installation may cause compression loss, engine overheating, or catastrophic engine failure. Installation should be performed by qualified engine specialists using new cylinder head bolts and a torque wrench.

1. Safety Prep — Disconnect battery negative terminal; drain coolant; remove related components
2. Remove Cylinder Head — Loosen cylinder head bolts in workshop manual sequence; remove old cylinder head
3. Clean Sealing Surfaces — Thoroughly clean block and head sealing surfaces — remove all old gasket residue (must be clean for new gasket to seal)
4. Check Surface Flatness — Check block and head sealing surfaces for warping, scoring, or corrosion (machine if necessary)
5. Inspect Head Bolts — Use new cylinder head bolts (old bolts must not be reused)
6. Install New Gasket — Place new cylinder head gasket on block — ensure alignment dowels align and gasket orientation is correct
7. Install Cylinder Head — Carefully place cylinder head on gasket — ensure all bolt holes are aligned
8. Install New Bolts — Install new cylinder head bolts — apply engine oil to threads and bolt heads
9. Tighten Bolts — Torque bolts in stages (3–4 steps) to workshop manual specification in correct sequence (center outward) (must use torque wrench)
10. Angle Tightening — After final torque, perform angle tightening (e.g., 90° + 90°) as per workshop manual
11. Install Components — Install intake/exhaust manifolds, injectors, coolant hoses, and other components
12. Fill Coolant & Oil — Fill with Mitsubishi-specified coolant and engine oil
13. Bleed Air — Start engine; bleed cooling system air
14. Check for Leaks — Idle engine — check for coolant, oil, or gas leaks
15. Retorque Bolts — After engine reaches operating temperature and cools down, recheck cylinder head bolt torque
16. Verify Coolant Flow — Confirm cooling system circulation is normal