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Engine Mechanical (4HK1-TC) 6A-81 • Press the tool against the oil seal. Strike the tool to remove the seal from the inside of the Inspection 1. Inspect the cylinder head assembly. • Remove varnish, soot and others adhered on the metal surface completely. Use metal brush • Check the following causes in the case of leak of the seal surface of the cylinder head, - Defective installation. a. Damage on the screw surface or extracted cylinder head bolt due to extra tightening torque Caution: b. Inside the combustion chamber, glow plug hole. • Check whether there is a crack between the valve sheets and in the cylinder head of the c. Flatness of the under surface of the cylinder head • Use a straight edge ruler and thickness gauge to measure the four sides and d. Flatness of the surface where the exhaust manifold and inlet cover are installed N6A6139E Distortion of the under surface of the mm (in) Standard 0.05 (0.002) or less Limit 0.20 (0.0079) N6A6140E N6A6141E |