how to remove timing chain from chevy corsica
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Filed Under (Pontiac) by admin on 25-08-2010
Note: GM does not provide timing chain timing marks, or information to perform timing chain service without the special tools shown in this procedure. Tools Required: – - J 36800 Camshaft Sprocket Timing Alignment Pin J 39579 Camshaft Sprocket Wrench Important: ^ ^ Before remove the timing chain, read the entire procedure. The timing chain on the engine is not to be replaced with the timing chain from any other model year. The timing sprockets are different on the engine and the shape of the links matches the sprockets. Engine damage may result if the wrong timing chain is used. The timing chain and the crankshaft sprocket must be marked in order to insure reassembly with the same side facing out at the time of reassembly. ^ Caution: Refer to Battery Disconnect Caution in Service Precautions. 1. Disconnect the negative battery cable. 2. Remove the engine front cover. Refer to Engine Front Cover Replacement. 3. Rotate the crankshaft clockwise (as viewed from the front of the engine, normal rotation) until the camshaft sprocket timing dowel pin holes line up with the holes in the timing chain housing. 4. The crankshaft sprocket keyway should point upwards and line up with the centerline of the cylinder bores. This is the Timed position. 5. Remove the timing chain guides. 6. Raise and support the vehicle. Refer to Vehicle Lifting. 7. Ensure that all of the slack in the timing chain is above the tensioner assembly. 8. Remove the timing chain tensioner. 9. The timing chain must be disengaged from any wear grooves in the tensioner shoe in order to remove the shoe. Slide a screwdriver blade under the timing chain while pulling the shoe outward. Notice: Do NOT attempt to pry the sprocket off the camshaft or damage to the sprocket or chain housing could occur. 10. If difficulty is encountered in removing the timing chain tensioner shoe, use the following procedure in order to remove the intake camshaft sprocket: 10.1. 10.2. 10.3. 10.4. Lower the vehicle. Hold the intake camshaft sprocket with the J 39579 and remove the sprocket bolt and washer. Remove the washer from the bolt and rethread the bolt back into the camshaft by hand (the bolt provides a surface to push against). Remove the intake camshaft sprocket. Use a three-jaw puller in the three relief holes in the sprocket.
Filed Under (Nissan) by admin on 28-11-2010
1. Release fuel pressure. See FUEL PRESSURE RELEASE . Drain coolant from radiator and cylinder block. Drain engine oil. Disconnect all necessary coolant hoses, electrical connectors, vacuum hoses, fuel lines and control cables. 2. Remove front exhaust tube. Remove intake manifold collector supports, and intake manifold. Remove exhaust manifold with catalytic converter. Remove air injection valve pipe. Remove intake air duct. Remove radiator fan and shroud. Remove injectors and fuel rail as an assembly. Remove distributor cap and spark plugs. 3. Set cylinder No. 1 at TDC of compression stroke, ensuring marks on crankshaft pulley and front cover align, and distributor rotor points to spark plug wire No. 1 on cap. Remove cylinder head cover. Remove distributor. NOTE: It is not necessary to install a stopper to prevent inner or outer timing chains from disengaging sprockets. 4. Prevent camshafts from turning, and remove camshaft sprocket bolts. Remove camshaft sprocket. See Fig. 13 . Mark and remove camshaft bearing caps in reverse order of installation. See Fig. 16 . Remove camshafts. 5. Loosen cylinder head bolts in 2 or 3 steps, in reverse order of tightening sequence. See Fig. 11 . Remove camshaft sprocket cover. Remove outer (upper) chain tensioner and guide. Remove outer timing chain. Remove idler sprocket bolt. Remove cylinder head. 6. Remove oil pan and oil strainer. See OIL PAN. Remove accessory drive belts. Remove A/C compressor idler pulley (if equipped). Remove crankshaft pulley. Remove front cover. Remove chain tensioner, tensioner arm and chain guides. Remove inner (lower) timing chain and idler sprocket. Remove oil pump drive spacer and crankshaft sprocket. Inspection 1. Inspect chain roller links. Replace 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 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
Filed Under (Nissan) by admin on 27-11-2010
CAUTION: If camshaft or crankshaft is rotated with timing chain disconnected, piston will contact valves, resulting in bent valves. NOTE: For reassembly reference, apply paint marks to timing chain and camshaft sprockets before removing. Removal 1. Release fuel pressure. See FUEL PRESSURE RELEASE . Drain coolant from radiator and cylinder block (drain plug is on left side of block, between flywheel and exhaust manifold). Remove accessory drive belts and power steering pump bracket. Remove intake air duct. Remove right front wheel and splash shield. 2. Remove engine undercovers. Remove front exhaust pipe. Remove front engine mount from cylinder head. Remove cylinder head cover, distributor cap and spark plugs. Remove intake manifold support. Set piston No. 1 at TDC of compression stroke. For installation reference, mark rotor in relation to distributor housing and distributor housing in relation to cylinder head. Remove distributor. 3. Remove cylinder head front cover. See Fig. 4 . Remove water pump pulley and thermostat housing. Remove chain tensioner and guide. See Fig. 6 . Loosen idler sprocket bolt. Remove camshaft sprockets. Remove idler sprocket bolt. Remove cylinder head bolts in 2 steps, in sequence. See Fig. 5 . Remove cylinder head with manifolds. Remove idler sprocket shaft from rear side. Remove outer (upper) timing chain. 4. Remove crossmember and rear engine mount. Remove oil pan and strainer. Remove crankshaft pulley. Support engine using a jack. Remove front engine mount. Remove front cover bolts (one of these bolts retains water pump and front cover). Remove front cover. Remove idler sprocket, inner (lower) timing chain and oil pump drive spacer. Remove chain guides and crankshaft sprocket.
Filed Under (Mitsubishi) by admin on 30-12-2010
Disassembly (Ram-50) 1) Remove both 4WD indicator switches and steel balls. Remove speedometer gear assembly. Remove output shaft cover, gasket, wave spring and spacer. See Fig. 3. Remove rear cover, rear cover gasket and spacer from chain cover. Drive roll pin out of high-low shift fork. 2) Remove 2 seal plugs. Remove 2 poppet springs and steel balls. Shift transfer case to “4WD” and pull high-low shift rail out, in rear cover direction. Remove interlock plunger. Remove pulse generator (if equipped), front output shaft cover and pulse rotor (if equipped). Remove snap ring from rear bearing on output shaft. Remove chain cover, oil guide and side cover. Remove countershaft locking plate. Remove countershaft. 3) Remove countergear, 2 thrust washers, 2 needle bearings and spacer through side cover opening. Remove snap ring, spring retainers and spring from 2WD-4WD shift rail. Remove front output shaft, rear output shaft and chain as assembly. 4) Remove 2WD-4WD shift fork and distance piece. Drive out 2WD-4WD shift rail spring pin. Remove 2WD-4WD shift rail and lug. Remove high-low shift fork and high-low synchronizer sleeve. Remove needle bearing and snap ring from input gear. Remove input gear assembly. 5) If either control shaft or input gear oil seals are to be replaced, drive out roll pin from transmission control change shifter. Separate transfer case from adapter. See Fig. 3. Disassembly (Montero) 1) Remove dynamic damper, 5 detection switches and 3 steel balls. Remove poppet plug, spring and steel ball. Remove speedometer gear assembly. Remove output shaft rear cover, spacers, dust seal guard and oil seals. Front output shaft cover, wave spring and spacer (if equipped). 2) Remove high-low shift rail plug and high-low shift fork spring pin. Shift transfer case to “4WD”. Remove rear cover and high- low shift rail. Remove interlock plunger. Remove rear output shaft (viscous coupling) assembly and center differential assembly. Remove 2WD-4WD synchronizer assembly, chain and front output shaft from transmission as a unit. With White paint make match marks in grooves of 2WD-4WD synchronizer in 3 places. With White paint make match marks on spline projections of 2WD-4WD synchronizer sleeve in 3 places. Refer to match marks during reassembly. 3) Remove snap ring, spring seat, spring, 2WD-4WD shift fork and 2WD-4WD synchronizer sleeve. Remove differential lock hub, oil dam cover and bearing retainer. Remove side cover and gasket. Remove transfer counter gear shaft, transfer counter gear, thrust washer, needle bearings and spacer. Remove transfer drive shaft assembly. Remove high-low shift fork assembly and clutch sleeve. Remove transfer input gear assembly. 4) Remove 2WD-4WD shift lug spring pin, spring, spring retainer 2WD-4WD shift lug and shift rail. Remove input gear oil seal, baffle plate, dust seal guard and front output shaft oil seal. See Fig. 4.
Filed Under (Ford) by admin on 05-02-2011
1. Remove the engine front cover; refer to the procedure in this section. 2. Remove the (A) crankshaft sensor ring from the (B)crankshaft (6303). 3. On WEP engines, use the (A) Camshaft Positioning Tool to position the (B) camshaft. 4. on REP engines, rotate the crankshaft until both camshaft keyways are 90° from the cam cover surface. On REP and WEP engines, make sure the copper links line up with the dots on the camshaft sprockets. 5. On REP equipped engines, install the (A) Cam Positioning Tool and the Camshaft Positioning Tool Adapters on the (B) camshaft. 6. On WEP engines, install the (A) Camshaft Holding Tool on the (B) camshaft. 7. Remove the (A) LH timing chain tensioner bolts and the (B) LH timing chain tensioner. 8. Remove the (A) RH timing chain tensioner bolts and the (B) RH timing chain tensioner. 9. Remove the LH and RH timing chain tensioner guides from the dowel pins. 10. CAUTION: At no time, when the timing chains are removed and the cylinder heads are installed may the crankshaft or camshaft be rotated. Severe piston and valve damage will occur. Remove the RH and LH timing chains and crankshaft sprockets. 1. Lift RH timing chain off of the camshaft sprocket and slide the timing chain and crankshaft sprocket off of the crankshaft. 2. Lift the LH timing chain off the camshaft sprocket and slide the timing chain and the crankshaft sprocket off of the crankshaft. 11. On REP engines, remove the chain guides. 1. Remove the LH timing chain guide bolts. 2. Remove the LH timing chain guide. 3. Remove the RH timing chain guide bolts. 4. Remove the RH timing chain guide.