Question 1

How to properly remove, inspect, and install the flywheel to ensure correct alignment and prevent future issues on 4 cylinder Nissan Altima?

Accepted Answer

To remove the engine/transaxle assembly, first separate the transaxle from the engine. If a manual transmission is present, take out the pressure plate and clutch disc. Use a center-punch or paint to create alignment marks on the flywheel/driveplate and crankshaft for correct alignment during installation. Remove the bolts securing the flywheel/driveplate to the crankshaft and then take off the flywheel/driveplate. For installation, if a manual transaxle is present, clean the flywheel to eliminate grease and oil, inspecting it for cracks, rivet grooves, burned areas, and score marks, with light scoring removable using emery cloth. Check for cracked and broken ring-gear teeth, laying the flywheel on a flat surface to check for warpage with a straightedge. Clean and inspect the mating surfaces of the flywheel/driveplate and crankshaft, replacing the crankshaft rear seal if it is leaking before reinstalling. Position the flywheel/driveplate against the crankshaft, ensuring the spacer is installed (if equipped) and aligning the marks made during removal. Some engines may have an alignment dowel or staggered bolt holes for correct installation. Apply thread-locking compound to the bolt threads before tightening, using a screwdriver wedged in the ring gear teeth to prevent movement, and follow a criss-cross pattern to reach the final torque in three or four steps. The remainder of the installation follows the reverse order of removal, and finally, reconnect the battery and perform the necessary re-learn procedures.

Question 2

How to remove and inspect a flywheel on 1.2L petrol Nissan Juke?

Accepted Answer

Regarding the modification process, one has first to cancel the flywheel by first unbolting the transmission and then the clutch. To stop the flywheel from spinning you should either wedged the ring gear teeth with a bar, or else put a strap from the flywheel to the cylinder block. Then unscrew and take out the retaining bolts and finally, the flywheel is slid off the crankshaft with careful not to drop it since they are very heavy. For inspection, if clutch mating surface of the flywheel is deeply scored, Cracked or damaged, then it has to be replaced, it is recommended to consult a nissan dealer or any reputable engine reconditioning service. However, if the ring gear becomes worn or acquired without some teeth, it also needs to be replaced, and it is suggested to consult with Nissan dealer or specialist whether it is possible to restore. Cleansing of the mating surfaces of the flywheel as well as the crankshaft is done before positioning of the flywheel and new retaining bolts necessary for refitting done. Lock the ring gear similar to the previous step and torque the retaining bolts up to the required measure in two steps using an angle tightening gauge. Last but not the least, a clutch should be re-fixed while the lock tool should be removed from the transmission before fixing it.

Question 3

How to properly remove and reinstall a flywheel or driveplate on Nissan Maxima with DOHC engine?

Accepted Answer

Raise the vehicle and support it securely on jackstands. If equipped with a manual transaxle, remove the pressure plate and clutch disc, taking the opportunity to check or replace the clutch components and pilot bearing if necessary. For vehicles with an automatic transaxle, check and replace the front pump seal or O-ring. Use paint or a center-punch to make alignment marks on the flywheel or driveplate and crankshaft to ensure correct alignment during reinstallation. Remove the bolts securing the flywheel or driveplate to the crankshaft, and if the crankshaft turns, hold the flywheel or driveplate with a pry bar or jam a screwdriver into the ring gear teeth. Carefully remove the flywheel or driveplate from the crankshaft, supporting it while removing the last bolt due to its weight. Clean the flywheel to remove grease and oil, inspecting the surface for cracks, rivet grooves, burned areas, and score marks, with light scoring removable using emery cloth. Check for cracked or broken ring gear teeth or a loose ring gear, laying the flywheel on a flat surface to check for warpage with a straightedge. Clean and inspect the mating surfaces of the flywheel or driveplate and crankshaft, replacing the crankshaft rear seal if leaking before reinstalling. Position the flywheel or driveplate against the crankshaft, aligning the marks made during removal, and noting any alignment dowels or staggered bolt holes for correct installation. Apply thread locking compound to the bolt threads before tightening, using a screwdriver wedged into the ring gear teeth to prevent turning. Complete the installation by reversing the removal process.

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