cylinder head removal on a duramax
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Filed Under (Toyota) by admin on 05-08-2010
1. Install cylinder head. A. Place cylinder head on cylinder block. (a) Place a new cylinder head gasket on the cylinder block. CAUTION: Be careful of the installation direction. (b) Place the cylinder head on the cylinder head gasket. B. Install cylinder head bolts. NOTE: The cylinder head bolts are tightened in 2 progressive steps (steps (b) and (d)). If any cylinder head bolt is broken or deformed, replace it. (a) Apply a light coat of engine oil on the threads and under the heads of the cylinder head bolts. Cylinder Head Installation Install and uniformly tighten the 10 cylinder head bolts and plate washers in several passes, in the sequence shown. Torque: 49 Nm (36 ft. lbs.) If any one of the cylinder head bolts does not meet the torque specification, replace the cylinder head bolt. (c) Mark the front of the cylinder head bolt head with paint. (d) Retighten the cylinder head bolts 90° in the numerical order shown. (e) Check that the painted mark is now at a 90° angle to the front. Install the 2 bolts holding the water bypass pipe to the cylinder head. Torque to 19 Nm (14 ft. lbs.) (g) Connect the camshaft position sensor connector. 2. Install spark plug tubes. (a) Clean the cylinder head tube holes of any residual adhesive, oil or foreign particles. Remove any oil with kerosene or gasoline. (b) Screw the threads of the spark plug tube coated with adhesive into the cylinder head.
Filed Under (Hyundai) by admin on 04-05-2011
1. 2. 3. 4. 5. Drain the coolant and disconnect the upper radiator hose. Remove the breather hose (between the air cleaner and the rocker cover). Remove the air-intake hose. Remove the vacuum hose, fuel hose and coolant hose. Remove the cables from the spark plugs. The cables should be removed by holding the boot portion. Remove the ignition coil. Remove the surge tank. Remove the intake manifold. Remove the heat protector and exhaust manifold assembly Remove the coolant pump pulley and the crankshaft pulley. Remove the timing belt cover. 6. 7. 8. 9. 10. 11. Zoom Sized for Print 12. Move the timing belt tensioner pulley toward the coolant pump and temporarily secure it. 13. Remove the timing belt. 14. Remove the rocker cover. 15. Remove the cylinder head assembly. The cylinder head bolts should be removed using Special Tool, Cylinder Head Bolt Wrench (09221-21000), in the sequence as shown in the illustration. 16. Remove the gasket pieces from the cylinder block top surface and cylinder head bottom surface. NOTE: 1. Make sure that the gasket pieces do not fall in to the engine. INSPECTION 1. Check the cylinder head for cracks, damage and coolant leakage. 2. Remove scale, sealing compound and carbon deposits completely. After cleaning oil passages, apply compressed air to make certain that the passages are not clogged. 3. Check the cylinder head surface for flatness using a straight edge in the direction of A, B, …as shown. If flatness exceeds service limit in any direction, replace the cylinder head, or lightly machine the cylinder head surface. Cylinder head flatness Standard value: Less than 0.03 mm (0.0012 inch) Limit: 0.08 mm (0.0031 inch) REASSEMBLY 1. Clean all gasket surfaces of the cylinder block and the cylinder head. 2. Install a new cylinder head gasket onto the cylinder head assembly. Do not apply sealant to the gasket and do not reuse the old cylinder head gasket.
Filed Under (Nissan) by admin on 29-11-2010
Remove outer (upper) timing chain. See TIMING CHAINS . Remove idler sprocket and shaft. Prevent camshafts from turning, and remove camshaft sprocket bolts. Remove camshaft sprocket. Mark and remove camshaft bearing caps in reverse order of installation. See Fig. 30 . Remove camshafts. 2. Loosen cylinder head bolts in 2 or 3 steps, in reverse order of tightening sequence. See Fig. 31 . Remove camshaft sprocket cover. Remove outer (upper) chain tensioner and guide. Remove outer timing chain. Remove idler sprocket bolt. Remove cylinder head. Inspection (240SX, Altima & Frontier) 1. Inspect timing chain roller links. Replace timing chain if roller links are cracked or worn. Inspect cylinder head and cylinder block mating surfaces for warpage. If warpage exceeds specification, machine cylinder head. See CYLINDER HEAD (EXCEPT 1997 PICKUP) table under ENGINE SPECIFICATIONS. 2. If machining reduces cylinder head height to less than specification, replace cylinder head. After machining, rotate camshaft by hand. Replace cylinder head if camshaft does not rotate freely. Installation (240SX, Altima & Frontier) 1. Install cylinder head and NEW gasket. Tighten cylinder head bolts in sequence shown. See Fig. 31 . See TORQUE SPECIFICATIONS . 2. Install upper timing chain. See TIMING CHAINS . Tighten all fasteners to specification. See TORQUE SPECIFICATIONS
Filed Under (volkswagen) by admin on 22-03-2011
Note: Components depicted here correspond to cylinder bank 1. They are different only as a mirror image of components for cylinder bank 2. 1 – Connecting hose On vehicles with engine code BWF To crankcase ventilation valve Ensure seated tightly 2 – Sealing sleeve On vehicles with engine code BWF Replace if damaged Ensure seated tightly 3 – Bracket On vehicles with engine code BWF For intake hose between air filter and intake manifold flap 4 – Acoustic cover For vehicles with engine code BWF 5 – Cylinder head cover On vehicles with engine code BWF Always clean sealing surfaces of cylinder head cover with a clean cloth before setting in place Replace seal together with cylinder head cover if damaged or leaking Observe tightening sequence of bolts 6 – Acoustic cover For vehicles with engine code BKW 7 – Cylinder head cover For vehicles with engine code BKW Always clean sealing surfaces of cylinder head cover with a clean cloth before setting in place Replace seal together with cylinder head cover if damaged or leaking Observe tightening sequence of bolts 8 – 20 Nm Between control housing and cylinder head 9 – Cylinder head gasket Replace Install new seal of the same strength Imprint of replacement part numbers – A – must be readable After replacing replace entire amount of coolant 10 – Cylinder head Removing and installing 11 – Cylinder head bolt Replace Observe sequence for loosening and tightening head, removing and installing 12 – Sealing sleeve For vehicles with engine code BKW Replace if damaged Check for secure seating 13 – Connection piece For vehicles with engine code BKW To crankcase ventilation valve Check for secure seating Cylinder heads, removing and installing
Filed Under (Hyundai) by admin on 25-11-2010
DISASSEMBLY 1. Using a tool remove the cylinder head bolts in the order shown in the illustration. 2. Using the special tool (09222-28000, 09222-28100), remove the valve retainer lock. Next remove the spring retainer, valve spring, spring seat and valve. Arrange these parts so that they can be reinstalled in their original positions. 3. Remove the valve stem seals with pliers. Do not reuse the valve stem seals. INSPECTION CYLINDER HEAD 1. Check the cylinder head for cracks, damage and coolant leakage. If cracked, replace the cylinder head. 2. Remove scale, sealing compound and carbon deopsits completely. After cleaning the oil passages, apply compressed air to verify that the passages are not clogged. 3. Check the cylinder head surface for flatness in the direction as shown in the illustration. If flatness exceeds the service limit in any direcftion, either replace the cylinder head or machine the cylinder head matching surface lightly. Flatness of cylinder head gasket surface Standard : Less than 0.03 mm (0.0012 in.) Limit : 0.2 mm (0.008 in.) VALVES 1. Using a wire brush, clean the valve thoroughly. 2. Check each valve for wear, damage and distortion of the head and the stem at B position. Replace, if necessary. If stem end, A, is hollowed out or worn, resurface as necessary. This correction must be limited to a minimum. Also resurface the valve face. Replace the valve if the margin has decreased to less than the service limit.