Pontiac 96067711 Piston Set, Os:050

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It is important to check for ridges in the cylinder because carbon deposits or cylinder wear can produce ridges at the upper limit of ring travel. These ridges must be completely removed before attempting to remove the piston/connecting rod assemblies to avoid piston breakage.

To ensure clean cylinder walls and chamfer top edge of each cylinder before installing piston/connecting rod assemblies. Similarly, for the installation to be successful, the crankshaft must be positioned well. Therefore, by removing the cap from the end of number one connecting rod and wiping bearing surfaces of both connecting rod and cap with clean cloth. The tab on this bearing insert should fit into a recess in the rod too. Also, another bearing insert has to be cleaned at its backside before it is put into position in the rod cap with its tab matching a recess in the cap. After that, put piston ring gaps around piston then apply some clean engine oil to lubricate both piston and rings. Using a Piston Ring Compressor, attach it to pistons; compress also until rings become flush with pistons themselves. Finally rotate crankshaft so that number one connecting rod journal is at bottom dead center then coat cylinder walls with an engine oil film. Match pistons to cylinders and gently insert assembled piston/connecting rods assembly into number one cylinder bore. While guiding connecting rod onto crankshaft journal tap top of piston using wooden/plastic hammer handle as well as fit it perfectly in place. Plastigage will be used to measure clearance which requires being checked after assembling the entire unit (piston/rod). To do so, plastigage material needs to be wiped out from either the bearing face or rod journal followed by application of moly-based grease or clean engine assembly lube on them all over again Clean Plastigage material off bearing face/rod journal and then apply a thin coating of clean molybase grease or engine assembly lube across them Slide back connecting road into place over journal; install next rod cap using nuts that will need tightening up until reaching required torque value Awaiting for completion suivant cet ordre de retirer les composants restants. Finally install other remaining components in reverse order.

During the inspection, each piston should be checked for cracks around the skirt, pin bosses, and ring lands. Scoring, scuffing, holes in the piston crown, and burned areas at the crown's edge should also be noted.