Pontiac 471529 Engine Crankshaft FLYWHEEL

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The flywheel can be unbolted from the crankshaft rear flange after removing the transmission, In the case of manual transmission the flywheel has to be unbolten with the clutch housing and clutch. While loosening the bolts, the crankshaft cannot turn; to avoid this put a piece of wood between one of the crankshaft throws and the side of the engine block, or use an alignment tool passed through the flywheel and the block. Before fixing the flywheel in place, ensure that the surfaces to be mated are clean; this will involve cleaning the face of the flywheel and that of the crankshaft. For manual transaxles, position the crankshaft dowel hole to the flywheel dowel hole whenever you are assembling the two components. When installing automatic transmissions position the flywheel so that the pads on which the torque converter bolts attach are on the transmission end of the flywheel. Tighten the bolts to the standard tightening pattern and ensure that the torque specification has been met, additionally use thread locking on the part threads of the bolts. Once more, it is advisable to use a block of wood or a center punch tool against the block so that the flywheel will not turn any more as the bolts are being tightened.

Start off by eliminating the transmission together with the clutch. Subsequently, disengage the bolts holding the flywheel to the crankshaft flanges and also pull off the flywheel. These bolt holes are specified to be unequal to guarantee correct positioning of the flywheel to its compliment on the engine. When fitting the flywheel, make sure the crankshaft flange has no burr so as to avoid run out and free vibration, tighten the bolts to specifications.

Install the flex plate and torque-tighten the bolts according to the specified requirements.

Repeat this procedure until a reduction in vibration is noted, making fine adjustments by moving the clips in small increments until the vibration is eliminated.

Inspect the converter securing bolt holes for elongation.

Tap the high side of the flex plate with a mallet or similar tool to correct it.

Examine the starter ring gear for broken or chipped teeth. If any are evident, the flywheel must be replaced with a new one.

Begin by removing the transmission and clutch, ensuring to mark the clutch cover and flywheel for proper reinstallation.

Install a clip at one of the marked locations, and with the transmission in 'Neutral', run the engine to note any vibration.

For manual transmissions, the flywheel should be installed by aligning the dowel hole in the crankshaft with the dowel hole in the flywheel.

If equipped with a manual transmission, reinstall the clutch disc and pressure plate, tightening the pressure plate bolts to the specified torque, and finally, reinstall the transmission.