It is mounted in the engine block and directs a jet of oil toward the bottom of the piston, helping to reduce its temperature and lubricate the piston-cylinder assembly. It is located in the cylinder block, where its function is to spray oil under the piston for cooling and lubrication. It is made of metal, primarily steel.
Engines: Cummins 6C, 6CT, 6CTA 8.3, ISC, QSC, ISL, QSL.
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