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EXHAUST MANIFOLD DESCRIPTION The two exhaust manifolds are log style and are made of high silicon molybdenum cast iron. The exhaust manifolds share a common gasket with the DIAGNOSIS AND TESTING ENGINE DIAGNOSIS—INTRODUCTION Engine diagnosis is helpful in determining the causes of malfunctions not detected and remedied by These malfunctions may be classified as either per- formance (e.g., engine idles rough and stalls) or Refer to the Service Diagnosis—Performance chart and the Service Diagnosis—Mechanical chart for pos- Additional tests and diagnostic procedures may be necessary for specific engine malfunctions that can • Cylinder Compression Pressure Test. • Cylinder Combustion Pressure Leakage Test. • Engine Cylinder Head Gasket Failure Diagnosis. • Intake Manifold Leakage Diagnosis. Fig. 13 Exhaust Manifolds 4.0L Engine Fig. 11 Oil Pan 1 – OIL PAN Fig. 12 Intake Manifold 4.0L Engine 9 - 68 4.0L ENGINE XJ DESCRIPTION AND OPERATION (Continued) |