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Isx Injector Cup Replacement Rar

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Isx Injector Cup Replacement Rar

How to Replace ISX Injector Cups Without Removing the Head

Injector cups are metal sleeves that fit inside the cylinder head of a Cummins ISX engine and hold the injectors in place. Injector cups can leak fuel or coolant into the combustion chamber, causing performance issues and engine damage. Replacing injector cups usually requires removing the cylinder head, which is a time-consuming and costly process. However, there is a way to replace injector cups without removing the head, using a special tool and some tips.

The tool that allows injector cup replacement without head removal is called an injector cup retainer/crush ring installer. It is sold by Cummins under part number 3164001. This tool consists of a threaded rod, a sleeve, a nut, and a washer. The tool works by installing a metal ring around the top of the new injector cup, which creates a tight seal between the cup and the head. The tool can be used on ISX engines with single overhead camshafts (SOHC), such as ISX15 and QSX15 models.

To use the tool, you need to follow these steps:

Remove the injectors from the cylinder head. You may need to use an injector puller tool to loosen them.

Clean the injector bore and cup area with a brush and solvent. Make sure there is no debris or carbon buildup.

If there is a metal ring at the top of the old injector cup, knock it out with a drift or punch from the deck surface towards the spring side. This ring is a warranty field fix for leaky cups and should not be reused.

Use an injector cup removal tool to extract the old cup from the head. You may need to apply some heat to loosen it.

Clean the injector bore and cup area again with a brush and solvent.

Apply some high-temperature sealant to the outside of the new injector cup.

Insert the new injector cup into the bore and align it with the hole for the injector.

Place the metal ring over the top of the new injector cup.

Thread the rod of the injector cup retainer/crush ring installer through the hole for the injector until it reaches the bottom of the cup.

Slide the sleeve over the rod and position it over the metal ring.

Place the washer and nut on the rod and tighten them until they contact the sleeve.

Use a torque wrench to tighten the nut to 37 ft-lb (50 Nm).

Loosen and remove the nut, washer, sleeve, and rod from the injector bore.

Repeat steps 3-13 for each injector cup that needs to be replaced.

Reinstall the injectors and torque them to 37 ft-lb (50 Nm).

By following these steps, you can replace ISX injector cups without removing the head, saving time and money. However, this method may not work for all cases, especially if there is severe damage or corrosion in the head or cups. In that case, you may need to remove the head and have it machined or replaced. Always consult your service manual and follow safety precautions when working on your engine. aa16f39245


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