Glacier Diesel Power 2007.5–2018 Dodge Ram 6.7L Cummins VGT Coolant Plug | 16mm Turbo Coolant Delete Plug

Description

Converting your 6.7L Cummins from the factory water-cooled Variable Geometry Turbocharger (VGT) to a fixed geometry turbo requires more than simply replacing the turbocharger. The factory cooling system includes dedicated coolant passages that supplied coolant to the original VGT. Once the stock turbo is removed, those ports must be properly sealed to prevent coolant loss.

The Glacier Diesel Power 16mm VGT Coolant Plug is designed specifically for 2007.5–2018 Dodge Ram 6.7L Cummins trucks converting to a non-water-cooled turbocharger. These plugs seal the factory coolant ports after the VGT is removed, allowing the cooling system to remain properly sealed while completing your turbo conversion.

Whether you're installing an S300, S400, or another fixed geometry turbocharger, these plugs provide a simple, reliable solution for eliminating unused coolant connections.

Features

• Designed for 2007.5–2018 Ram 6.7L Cummins
• 16mm coolant port plug
• Seals factory VGT coolant passages
• Required for most fixed geometry turbo conversions
• Precision-machined construction
• Reusable design
• Easy installation
• Helps prevent coolant leaks after VGT removal
• Compact, OEM-style fit

Why Are Coolant Plugs Needed?

Beginning with the 6.7L Cummins, Ram equipped the factory VGT turbocharger with coolant passages to help regulate turbocharger temperatures during operation.

When converting to an aftermarket fixed geometry turbo, those coolant passages are no longer used. If they're left open, coolant will immediately leak from the engine as soon as the cooling system is filled.

Properly sealing these ports restores the integrity of the cooling system while eliminating unnecessary coolant plumbing associated with the factory turbocharger.

Cooling System Tech Tip

Many installers focus on the turbo itself but overlook the cooling system modifications required during a fixed geometry conversion.

Before refilling coolant:

• Verify every unused coolant port has been sealed.
• Replace damaged O-rings.
• Inspect heater hoses for age or cracking.
• Pressure test the cooling system before driving the truck.

Taking a few extra minutes during installation can prevent coolant leaks that are far more difficult to repair once the turbo and intake plumbing are back in place.

Common Uses

• S300 turbo conversions
• S400 turbo conversions
• Fixed geometry turbo installations
• Competition trucks
• Performance street builds
• Tow rig turbo upgrades
• VGT delete projects
• Custom turbo fabrication

Applications

Fits:

• 2007.5 Ram 2500 6.7L Cummins
• 2007.5 Ram 3500 6.7L Cummins
• 2008–2018 Ram 2500 6.7L Cummins
• 2008–2018 Ram 3500 6.7L Cummins

For trucks converting from the factory water-cooled VGT turbocharger to a non-water-cooled aftermarket turbo.

Important Notes

• Designed specifically for 2007.5–2018 6.7L Cummins VGT turbo conversions.
• Used to seal the factory coolant ports after removing the stock VGT turbocharger.
• Verify all coolant ports are properly plugged before refilling the cooling system.
• Always pressure test the cooling system after installation.
• Does not ship to California.

Cooling System Failure Point

One of the easiest mistakes during a turbo conversion is overlooking the coolant passages that supplied the factory VGT. Even a small leak from an unsealed coolant port can quickly drain coolant, introduce air into the cooling system, and lead to overheating if left unaddressed.

The Glacier Diesel Power 16mm VGT Coolant Plug is designed specifically to eliminate those unused coolant ports, helping ensure your cooling system remains sealed and reliable after the turbo conversion is complete.

Glacier Engineering Recommendation

If you're already converting to a fixed geometry turbo, it's the perfect time to inspect the rest of your cooling system.

We recommend checking:

• Heater hoses
• Coolant standpipe adapters
• Coolant O-rings
• Thermostat housing
• Turbo coolant plumbing
• Cooling system pressure

Replacing worn components while the turbo is already removed can save hours of labor later and help prevent coolant leaks after the truck is back on the road.

Complete Your Turbo Conversion

Pair this coolant plug with other Glacier Diesel Power products for a cleaner, more reliable installation:

• Billet Standpipe Heater Hose Adapter
• 1/2" Square Drive Pipe Plug
• 3/4" Billet Hose Plug
• Silicone Heater Hose
• Cooling System Test Plugs
• Fuel System Upgrades
• Air-Boss Intake Plenum

Completing the entire cooling system during your turbo conversion helps eliminate future leak points, simplifies maintenance, and ensures your new turbo installation is as dependable as it is powerful.