UENR0623-02 81 Basic Engine 3. Check the front camshaft bearing for wear. Refer to Specifications, “Camshaft Bearings” for the correct specification of the camshaft bearing. If a new bearing is needed, use a suitable adapter to press the bearing out of the bore. Ensure that the oil hole in the new bearing faces the front of the block. The oil hole in the bearing must be aligned with the oil hole in the cylinder block. The bearing must be aligned with the face of the recess. i04338889 Cylinder Head - Inspect 1. Remove the cylinder head from the engine. 2. Remove the water temperature regulator housing. 3. Inspect the cylinder head for signs of gas or coolant leakage.
Illustration 69 g02490336 Flatness of the cylinder head (typical example) 4. Remove the valve springs and valves. (A) Side to side (B) End to end (C) Diagonal 5. Clean the bottom face of the cylinder head thoroughly. Clean the coolant passages and the lubricating oil passages. Make sure that the contact surfaces of the cylinder head and the cylinder block are clean, smooth, and flat. 8. Measure the cylinder head for flatness. Use a straight edge and a feeler gauge to check the cylinder head for flatness. 6. Inspect the bottom face of the cylinder head for pitting, corrosion, and cracks. Inspect the area around the valve seat inserts and the holes for the fuel injection nozzles carefully.
Measure the cylinder head from one side to the opposite side (A). Measure the cylinder head from one end to the opposite end (B). 7. Test the cylinder head for leaks at a pressure of 200 kPa (29 psi). Measure the cylinder head from one corner to the opposite corner (C). Refer to Specifications, “Cylinder Head” for more information. i04156372 Piston Height - Inspect Table 10 Required Tools Tool Part Number Part Description Qty A 21825617 Dial Gauge 1 B 21825496 Dial gauge holder 1