General Motors GM-51766 Rear Seal Installer Pilot Shop by Category > Cooling System>Recyclers/Exchangers Coilhose Pneumatics 27FC3-X 3/8" Integral

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General Motors GM-51766 Rear Seal Installer Pilot Shop by Category > Cooling System>Recyclers/Exchangers Coilhose Pneumatics 27FC3-X 3/8" IntegralGeneral Motors GM 51766 Rear Seal Installer Pilot Kent Moore Tool Number: EN 51766 The rear crankshaft seal is part of the rear cover and is installed to the rear face of the block as an assembly on HF V6 engines. For the Gen II HF V6, the pilot on the rear flange of the crankshaft has an increased diameter, and the flywheel mounting bolts have changed from M10x1. 0 to M10x1. 5 thread pitch; therefore, the current GM 47839 does not fit. GM 51766 fits