GM 90537298 Sprocket,Water Pump

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The time-keeping system is very much intricate and any wrong doing to the system is very likely to cause a very severe harm to the engine. People who have little experience in the matter certainly should not attempt this procedure; if there is any doubt about one's ability, one should seek the advice of a specialist. Recheck all work to be carried out before starting the engine. This is quite a complicated process and for that, should read through all the instructions and gather all the requisite tools and components for the process such as new camshaft sprocket bolts. Starting with decreasing the fuel pressure, the removal of spark plugs, setting the engine to a TDC, the removal of the negative cable to the battery, the removal or the valve cover, the draining of the engine oil, and the final removal of the drive belt together with the timing chain cover. Subsequently, take out the upper timing chain guide bolts and guide and then compress the tensioner, finally, take out the tensioner and gasket. Further, the rear and front timing chain guides, the timing chain fixed on crankshaft and camshaft sprockets, and timing chain tensioner are to be eradicated. Disconnect the timing chain oil nozzle by unscrewing it with an Allen wrench; slide off the camshaft sprocket(s) also and dispose the old bolt. For 1.5L engines, it is necessary to remove the upper oil pan and oil pump, turn the oil pump drive chain tensioner away from the chain and lock it in the retracted position and then, remove the tensioner. Relieve the oil pump chain from the sprockets and wash all the parts with solvent which should then be checked for signs of wear or damage, should there be any replace them. Prior to engaging the engine crank the crankshaft should be manually rotated several times, preferably two at least and it should be felt that there is some load on the shaft. For the 1.5L engines, position the oil pump drive chain over the crankshaft sprocket, then install oil pump along with the tensioner and properly adjust the position of the spring of the tensioner and tightly fix the tensioner bolt. Let go of the retaining tool then fit in the upper oil pan. On the timing chain, fit the oil nozzle as well as the camshaft positions should also be checked before the fitting of the camshaft sprockets and tightening of new bolts. Grasp the camshaft with a wrench and tighten the nut for the actuator sprocket; place the crankshaft sprocket on the crankshaft so that the keyway will fit into place. Position the timing chain of the car over the crankshaft sprocket and over the camshaft sprockets so that the timing marks matched and then add the timing chain guides and the tensioner and fasten all the bolts to the correct measurement of torque. Check that the colored links of the timing chain coincide, install the timing chain cover and the valve cover and complete the assembly the other way round. Last but not the least inspect the exhaust system then replace the oil filter, add oil to the crankcase, connect the battery, add thermostat and coolant to the cooling system then start the engine to check the engine for leaks.

To start with removing the engine parts let the cable of the battery's negative terminal be pulled out, and then the hood. Remove the coolant and the engine oil in addition to unbolting the drivebelt ad the drivebelt tensioner. Subsequently, pull out the thermostat along with the water pump pulley, and then the crankshaft pulley. Bolt the engine support fixture to the engine lifting eyes and remove the passenger side engine mount and the mount support bracket from the front of the timing chain cover. Take out the oil pan, disconnect the coolant from the coolant bypass pipe for some of the engine models, and remove crankshaft position sensor and camshaft actuator solenoid. Withdraw the timing chain cover-to-engine block bolts and, if needed, tap it gently, to take it away from the engine. Mentally place the crankshaft pulley bolt for sometime and rotate the crankshaft until the groove on the crank shaft sprocket is inline with the mark on the chain tensioner plate. Take out the camshaft sprocket bolts while not rotating the camshaft Most of the camshaft sprocket bolts require the use of a special TORX PLUS socket on certain models. Gently unscrew the camshaft sprocket and remove the timing chain and the camshaft sprocket from the engine carefully from the camshaft dowel pin. Check on the timing chain for any signs of wear and damage and it is best to replace the timing chain and sprockets as 'a set'. For particular engines, check the condition of the timing chain tensioner plate and the part within, in order to work properly. Replace the timing case cover gasket, check the condition of the timing chain and sprockets for any sign of wear. To install: remove gasket materials on the cover and engine block put the tensioner plate in place and align the cam shaft before fitting the timing chain to the sprockets. Fasten the camshaft sprocket bolt, apply the chain & sprocket cover and thereafter release the tensioner locking pin. Depress the new gasket with sealant and then employ the cover and fasten the screws in criss-cross manner. Reverse the above mentioned removal steps, replace the oil as well as the coolant start the engine and test for any leakage.

Unplug the cable from the negative battery terminal and facing TDC for number one cylinder, drain the engine oil. Remove drivebelt. Remove of drivebelt tensioner from front cover. Remove the engine front cover. Remove valve cover. Remove timing chain tensioner. Take off upper timing chain guide. Remove exhaust camshaft sprocket bolt. Undo adjustable timing chain guide's access bolt and remove fixed timing chain guide upper mounting bolt at the same time unscrew fixed timing chain guide upper mounting bolt through access hole with screwdriver located on lower camchain housing.Remove intake camshaft sprocket boltly unscrew it out through top of head;timing retainer about head.Invert cylinder block and slide out loose link.Install on camshaft exhaust camshaft sprocket screwing three bolts with specified torque.Install lower timing chain guide.Screw in intake camshaft sprocket for fixing purpose only.Instal uppr fixe timin hain gui desiged t supot upp cha.A wrench should be put on the intake camshaft hex and then tighten intake camshaft bolt.A wrench, placed onto exhaust cahmshat hex will help to tightenthe exhauscshat bo.Istall thathian tnserfosiic over91ding thrugh aperuare.Depending on application, this may be required.Install cylinder heads torquing each head bolts gradually in four steps.Apply small amount of RTV sealant to threads before replacing valve cover.Replace engine plastic covers.Reattach battery terminal wires and check for any leaks.

It's crucial to handle this procedure with expertise, as any errors can result in severe engine damage. Double-check all work and ensure the timing marks are correctly aligned before attempting to start the engine.

Remove the air filter housing and the air intake duct.

Begin by disconnecting the cable from the negative battery terminal and removing the spark plugs.

Inspect all components for wear or damage and replace any questionable parts.

Position the dowel pin at 3 o'clock, mesh the timing chain with the camshaft sprocket, and engage it with the crankshaft sprocket, ensuring the timing marks are aligned.

Before starting the engine, rotate the crankshaft by hand to check for resistance, which may indicate potential issues.

The first step is to disconnect the cable from the negative battery terminal.

Inspect the sprocket teeth, timing belt, camshaft endplay, timing belt tensioner, and water pump for wear or damage.

Clean the timing belt area, inspect the sprocket teeth for wear and damage, check the timing belt for cracks or oil residue, and ensure the timing belt tensioner operates smoothly, replacing any worn parts.

Install the adjustable timing chain guide, exhaust camshaft sprocket, fixed timing chain guide, and upper timing chain guide, tightening all bolts to the specified torque.

Remove the engine front cover and the valve cover again.

Begin by disconnecting the cable from the negative battery terminal and removing the timing belt cover.

Remove the tensioner locating pin.

After initial removal, you should remove the drivebelt tensioner and the engine front cover. Set the No. 1 piston at TDC (Top Dead Center) by aligning the marks on the crankshaft sprocket, intake camshaft sprocket, and exhaust camshaft sprocket.