What is a Cummins Injector Cup and What is its Purpose?

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2025-09-24 03:07:25 -

An injector cup is a precisely machined stainless steel sleeve that is pressed into the cylinder head. Each cylinder has one, and its job is to create a perfect seal for the fuel injector. Think of it as a dedicated, high-pressure plumbing line for each injector. Its key purposes are: Sealing Combustion Gases: It seals the injector tip from the extreme heat and pressure of the combustion...

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