Engine

normal operation after the repair.

Weak or broken valve spring INSTALL a new valve spring. TEST the

system for normal operation after the repair.

Carbon accumulation in ELIMINATE carbon buildup. TEST the combustion chamber system for normal operation after the repair.

Excessive oil Leaking oil REPAIR oil leakage. TEST the system for consumption normal operation after the repair.

Blocked or restricted INSPECT the turbocharger drain pipe. turbocharger oil drain pipe REPAIR as necessary. TEST the system for

normal operation after the repair.

Damaged or collapsed air Tighten hoses clamps. INSPECT for intake hoses and tubes damage and REPAIR as necessary. TEST

the system for normal operation after the repair.

Damaged exhaust or INSPECT for leaks. Leaks can be detected exhaust leaks at audibility or visually, by a discoloration turbocharger housing or caused by escaping hot exhaust gases. exhaust manifold. REPAIR as necessary. TEST the system for

normal operation after the repair.

Turbocharger oil seals REFER to Turbocharger Internal Oil Leak leaking Test.

REFER to: Turbocharger (303-04E Fuel Charging and Controls - Turbocharger - 2.3L EcoBoost (231kW/314PS), Diagnosis and Testing). TEST the system for normal operation after the repair.

Inoperative PCV system REPAIR or INSTALL new components as

necessary. TEST the system for normal operation after the repair.

Incorrect oil CHANGE oil to correct specification. TEST

the system for normal operation after the repair.

Worn valve stem seal INSTALL a new valve stem seal. TEST the

system for normal operation after the repair.

Worn valve stem or valve INSTALL a new cylinder head. TEST the guide system for normal operation after the repair.

Sticking piston rings INSTALL new piston rings. TEST the system

for normal operation after the repair.

Worn piston ring groove INSTALL a new piston and piston pin. TEST

the system for normal operation after the repair.

Worn piston or cylinder INSTALL a new piston or cylinder block.

TEST the system for normal operation after the repair.

Oil in coolant Leaking head gasket INSPECT the engine components. INSTALL

Damaged cylinder block new engine components as necessary. Damaged cylinder head Refer to the appropriate section in Group

303 for the procedure. TEST the system for normal operation after the repair.

Leaking oil cooler INSPECT the oil cooler and seal for

damage. INSTALL new components as necessary. Refer to the appropriate section in Group 303 for the procedure.