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GMC Savana 2500 Harmonic Balancer Parts Questions & Experts Answers
Q: How to replace the harmonic balancer on GMC Savana 2500?
A: The first step to replace a crankshaft balancer involves removing either the air conditioning belt when there is one or the accessory belt if there is no air conditioning system. Beginning by removing the Starter motor and lower Fan Shroud the technician should check that the Flywheel holding tool (J 42386-A) establishes tooth engagement with the engine Flywheel. Use one m10-1.5 x 120 mm bolt and one m10-1.5 x 45 mm bolt to fasten the j 42386-a before tightening them to 50 nm (37 ft. Lbs.). The bolt securing the crankshaft balancer needs removal for later reuse during the installation process. The crankshaft balancer remover (J 41816) combined with the crankshaft end protector (J 41816-2) allows you to remove the crankshaft balancer after cleaning and inspecting it. Then install the crankshaft balancer by aligning it directly on the crankshaft followed by the use of crankshaft balancer and sprocket installer (J 41665). Use the threaded rod along with its nut and washer along with the installer to start installation at the front end of the balancer. Hold the threaded rod hex section using a wrench while turning the installation tool nut clockwise with another wrench until the first part of crankshaft installation completes. Use the installation tool to drive the bigger end of the balancer against the front section until the complete installation is achieved. The previous crankshaft balancer bolt should be installed before tightening it to 330 nm (240 ft. Lbs.). Next remove the bolt. Measure the installation position of the balancer again; if necessary use the j 41665 to reinstall correctly. You should use a new crankshaft balancer bolt which requires an initial torque of 50 nm (37 ft. Lbs.) followed by the 140 degrees setting measured with the torque angle meter (J 36660-A). The procedure completes with Starter motor installation followed by lower Fan Shroud adjunction along with accessory Drive Belt installation unless a/c is present and its Drive Belt installation until executing the crankshaft position learn sequence.