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Vehicle Application: Customer Concern: Tests/Procedures: Potential Causes: Diagnostic Codes: 2002 Hyundai Sonata 2.4L, Vin S, Eng Cfg L4 Check engine light is on with a code P0350. 1. Check the spark plugs, verify that they are correct NGK plugs. 2. Check ignition coil and plug wires. Ignition Coil Spark Plug Wires Spark Plugs P0350 Confirmed Fix 1 – Ignition Coil, Spark Plug Wire(s) 1 – Ignition Coil
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MANUFACTURER’S SUGGESTED SCHEDULED MAINTENANCE The manufacturer recommends the belt be replaced every 60,000 miles, except in California. In California, inspect timing belt at 60,000 miles, and replace as necessary. REMOVAL & INSTALLATION CAUTION: This application is an interference engine. Do not rotate camshaft or crankshaft when timing belt is removed, or engine damage may occur. TIMING & COUNTERBALANCE SHAFT BELTS Removal CAUTION: DO NOT rotate engine counterclockwise (as viewed from timing belt end of engine). If reusing timing belt, place reference mark on timing belt to indicate direction of rotation before removing. 1. Remove drive belts and drive pulleys from crankshaft and water pump. Remove timing belt covers. To align timing marks, rotate engine clockwise so No. 1 cylinder is at TDC of compression stroke. Ensure camshaft sprocket timing marks align with upper surface of rocker cover. Dowel pin of camshaft sprocket should be pointing upward. See Fig. 1 and Fig. 2 . 2. Remove timing belt auto tensioner. If reusing timing belt, place mark on timing belt to indicate direction of belt rotation. Remove timing belt. Remove camshaft sprockets. 3. Remove plug at left side of block and insert a screwdriver to hold left counterbalance shaft in position. Screwdriver will have to be inserted at least 2.36″ (60 mm). Remove oil pump sprocket nut and sprocket. See Fig. 2 . 4. Loosen right counterbalance shaft sprocket mounting bolt. Remove tensioner “B” and timing belt “B”. See Fig. 2 . Remove crankshaft sprocket “B” from crankshaft.
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REMOVAL 1. Remove the wheel and tire. 2. Drain the gear oil or transaxle fluid. 3. Remove the cotter pin and driveshañ nut from the front hub 4. Remove the 2 bolts and disconnect the ball joint from the knuckle. 5. Using a plastic hammer, separate the driveshaft from the axle hub. 6. Push the axle hub toward the outside of the vehicle, and separate the driveshaft from the axle hub. Center bearing bracket 7. Insert a pry bar between the center bearing bracket and the driveshaft, and then pry the driveshaft from the transaxle. (2.7L ENG.) NOTE: Do not pull on the driveshaft, doing so will damage the D.O.J, or T.J. be sure to use the pry bar.Insert a pry bar between the transaxle case and the driveshaft, and pry the driveshaft from the transaxle (Except 2.7L ENG.) NOTE: Do not pull on the driveshaft, doing so will damage the D.O.J.; be sure to use the pry bar. Do not insert the pry bar deeply enough to damage the oil seal CAUTION: Do not apply the vehicle weight to the wheel bearingwhile the driveshaft is disconnected If the vehicle’s weight must be applied (because of vehicle movement or some other reason), use the special toot to hold the wheel bearing, as shown in the figure. 9. After releasing the auto tensioner, remove the drive belt. (2.7L ENG.) 10. Remove the alternator assembly (2.7L ENG.) 11. Remove the center bearing bracket mounting bolts. Insert the pry bar between the center bearing bracket and the cylinder block to disconnect the bracket from the cylinder block
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1. Remove the air intake hose connected to the throttle body. 2. Remove the accelerator and cruise control cables. 3. Remove the engine coolant hose and throttle body. 4. Remove the P.C.V. hose and brake booster vacuum hoses. 5. Disconnect the vacuum hose connections. 6. Remove the surge tank stay. 7. Bleed off the pressure in the fuel pipe line to prevent the fuel from spilling. 8. Disconnect the connector from high pressure hose. 11. Remove the delivery pipe with the fuel injector and the pressure regulator. NOTE: When the delivery pipe is removed, be careful not to drop an injector 2 of 2 12. Disconnect the wiring harness of the coolant sensor assembly. 13. Remove the surge tank. INSPECTION SURGE TANK AND INTAKE MANIFOLD 1. Check the surge tank and intake manifold for damage, cracking or restriction of the vacuum outlet port, water or gas passages.
