3165115 | Genuine Cummins® Valve Insert Installer

1. Presses Valve Inserts Into the Cylinder Head

It applies controlled force to push the insert into its machined pocket without damaging:

• The insert

• The cylinder head

• The surrounding aluminum or cast iron

2. Ensures Correct Alignment

Keeps the valve seat perfectly centered so the valve seals properly and the engine maintains compression.

3. Controls Installation Depth

The tool helps press the insert to the exact depth required for proper:

• Valve sealing

• Heat transfer

• Valve height adjustment

4. Prevents Damage

Using the tool prevents common issues such as:

• Cracking the cylinder head

• Warping the insert

• Misalignment

• Uneven seating

If the installer is worn or bent:

• Valve seats go in crooked

• Insert rocks or does not sit flat
  This results in poor valve sealing.

2. Uneven or Excessive Wear on the Installer Head

If the tool head is worn down or chipped:

• It can deform the insert

• It may slip during pressing

• It causes uneven seating pressure

3. Visible Cracks or Damage on the Tool

A damaged tool can:

• Flex under pressure

• Break during use

• Damage the cylinder head or valve seat

4. Tool No Longer Fits Inserts Properly

If the installer has deformed:

• It may be too loose or too tight around the insert

• Causes misalignment or scarring of the insert

5. Difficulty Maintaining Proper Depth

A worn depth stop or guide causes:

• Inserts to be pressed too shallow or too deep

• Incorrect valve height

• Loss of compression

6. Slipping or Poor Grip While Pressing

If the tool loses grip due to wear:

• Valve seats may not fully seat

• The tool may bounce or shift, causing misalignment

7. Damage to Cylinder Head or Valve Seats

This is a major symptom showing the tool is faulty:

• Scratches

• Gouges

• Crushed or warped valve seats

• Insert pockets damaged during installation

8. Inconsistent or Uneven Pressure Application

If internal components or attachments wear out:

• Pressure is not applied evenly

• Insert may crack or distort