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Checking Timing An access plug is provided in the cam drive belt cover so that camshaft timing can be checked without removal of the cover or any other parts. 1. Remove the access plug from the cam drive belt cover. 2. Rotate the crankshaft so that the No. 1 piston is rising on compression stroke. 3. Set the crankshaft to TDC by aligning the timing mark on the crank pulley with the TC mark on the belt cover. Always turn the engine in the direction of normal rotation (clockwise, as viewed from the front). Backward rotation may cause the timing belt to jump time, due to the arrangement of the belt tensioner. 4. Look through the access hole in the belt cover to make sure that the timing mark on the cam drive sprocket is lined up with the pointer on the inner belt cover. 5. Install the belt cover access plug. Adjusting Timing Belt SPECIAL SERVICE TOOL(S) REQUIRED Description Crankshaft Belt Tension Adjusting Tool T74P-6254-A 1. Remove the outer timing belt cover as outlined in this section. CAUTION: Attempting to adjust timing belt tension without loosening spring pivot bolt will break Crankshaft Belt Tension Adjusting Tool T74P-6254-A when relieving tension on the belt. 2. If belt timing or tension is incorrect, loosen timing belt spring pivot bolt. 3. Hold tensioner with Camshaft Belt Tension Adjusting Tool T74P-6254-A. 4. While holding tensioner, loosen adjusting bolt and gradually release spring tension. Loosening Timing Belt Tensioner, 2.3L Tool Number 8 — 5. Using adjusting tool, pry tensioner away from belt. While holding, tighten adjusting bolt. There should be no tension on belt. Camshaft Timing Belt, 2.3L I-4 Timing Mark on Camshaft Sprocket Remove the bolts holding the crankshaft position sensor in place and pull the sensor assembly free of the dowel pin. 7. Remove the crankshaft pulley , crankshaft pulley hub and timing belt guide. 8. Remove the drive belt and inspect it for wear or damage. If the belt is damaged, replace it. 9. Remove one spark plug from each cylinder. 10. If not done: a. Loosen tensioner adjusting bolt. b. Using Camshaft Belt Tension Adjusting Tool T74P-6254-A, pry tensioner clockwise against spring tension as far as possible. c. Tighten adjusting bolt to hold tensioner in released position. 11. Align crankshaft so number one piston is at TDC (top dead center) as indicated by timing mark. 12. Line up camshaft sprocket timing mark with inner timing belt cover timing mark and key is pointing down.

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1. Disconnect negative battery cable. Remove engine undercover. Place wooden block between jack and oil pan, and raise engine slightly. Remove engine mount assembly near timing belt cover. 2. Remove clamp for power steering return hose near timing belt cover. Remove all drive belts and tensioner pulley bracket. See Fig. 1 . Remove power steering and water pump pulleys. Rotate crankshaft clockwise so that No. 1 cylinder is at TDC of compression stroke. Remove crankshaft pulley. CAUTION: DO NOT rotate crankshaft counterclockwise. Ensure timing marks are aligned. If reusing timing belts, mark timing belts for direction of rotation. 3. Remove upper timing belt cover and gasket. Remove stub bolt of engine support bracket, and remove center timing belt cover. Remove lower timing belt cover. NOTE: Camshaft sprocket dowel pins will be in 12 o’clock position when timing marks are correctly aligned. 4. Ensure camshaft, crankshaft and oil pump sprocket timing marks are aligned. See Fig. 2 or Fig. 3 . Loosen tensioner pulley center bolt. Move tensioner to relieve timing belt tension. Remove timing belt. Remove timing belt auto tensioner. See Fig. 1 . 5. Remove plug from left side of cylinder block. Install a .31″ (8.0 mm) diameter Phillips screwdriver into the hole against balance shaft. See Fig. 4 . Screwdriver must go in at least 2.36″ (60 mm) or more. If screwdriver will only go in about .79-.98″ (20-25 mm) before striking balance shaft, turn sprocket one revolution and align timing mark. Keep screwdriver in place until timing belt is installed. This ensures balance shaft driven by oil pump sprocket remains in correct position. 6. To remove timing belt “B” (balance shaft belt), hold crankshaft sprocket stationary with a spanner wrench. Remove crankshaft sprocket bolt. Using gear puller, remove outer crankshaft sprocket. 7. Remove crankshaft sensing blade (if equipped). See Fig. 5 . Loosen timing belt “B” tensioner bolt. If reusing timing belt “B”, mark direction of belt rotation for reassembly reference. Remove timing belt “B”.

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WATER PUMP DRIVE BELT 1. Verify that the water pump drive belt auto tensioner indicator mark does not exceeds the limit. ? If it exceeds the limit, replace the water pump drive belt. (See WATER PUMP DRIVE BELT .) Fig. 21: Water Pump Drive Belt Auto Tensioner Limit Indicator Mark – Malfunction/Worn Belt WATER PUMP DRIVE BELT 1. Remove the plug hole plate. 2. Rotate the water pump drive belt auto tensioner counterclockwise to release the drive belt tension and remove the water pump drive belt. Fig. 23: Locating Water Pump Drive Belt Auto Tensioner 3. Reinstall the water pump drive belt or install a new water pump drive belt. WATER PUMP DRIVE BELT PULLEY REMOVAL NOTE 1. Replace part A of the SST [303-009 (49 UN30 3009)] with the SST [303-457 (49 UN30 3457)]. Fig. 31: Water Pump Pulley Removal Special Tools 2. Remove the water pump pulley using the SSTs.

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NOTE: Do not replace the timing belt if it has oil on it from the auto tensioner. Residual oil from the tensioner does not affect timing belt performance. 1. Follow steps 1 thru 12 of Timing Belt Removal in the engine mechanical section of the appropriate shop manual. 2. Secure the timing belt to both cam pulleys using plastic wire ties. This helps to keep the timing belt in place while you replace the auto-tensioner. WIRE TIES 3. Remove the timing belt auto-tensioner. 4. Install the new auto-tensioner. Refer to the engine mechanical section of the appropriate shop manual. 5. Remove the pin from the auto-tensioner, and remove the wire ties from the cam pulleys. 6. Replace the dipstick tube O-ring. 7. Install the remaining parts in the reverse order of removal. Tighten all nuts and bolts to the specifications shown in the appropriate shop manual. NOTE: Overtightening the power steering belt would cause the power steering pulley to fail, so make sure you set the belt tension to the used belt specification. Refer to the steering section of the appropriate shop manual. 8. Center-punch a completion mark above the fourth character of the engine compartment VIN.

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Removal (1979-83 Accord & 1979-82 Prelude) 1. Disconnect negative battery cable. Remove engine support bolts and nuts. Remove side rubber mount. Remove side mount bracket. Remove cruise control actuator. Remove engine splash guard. Remove water pump drive belt, water pump pulley and crankshaft pulley. See Fig. 1 . Remove alternator, belt, A/C compressor and belt. CAUTION: Crankshaft pulley bolt may stick to the crankshaft threads when properly torqued. A properly torqued pulley bolt may require up to two or three times the installation torque to remove. 2. Remove valve cover. Ensure cylinder No. 1 is at TDC of compression stroke and camshaft is aligned to mark. See Fig. 2 . Remove upper timing belt cover from cylinder head. Remove crankshaft pulley. Remove lower timing belt cover from engine block. Loosen, but do not remove, timing belt adjusting and pivot bolts. If reusing belt, mark direction of belt rotation. Slide belt off pulleys. Inspection (1979-83 Accord & 1979-82 Prelude) Inspect timing belt for wear or rounded edges of drive teeth. Inspect belt for signs of oil contamination. Replace belt if damaged or contaminated. Inspect all drive gears for wear in drive belt area. Replace as necessary. Installation (1979-83 Accord & 1979-82 Prelude) To install, reverse removal procedure, using care not to excessively bend or twist belt. If reinstalling old belt, install belt so same direction of rotation will be maintained. Adjust drive belts to proper tension.