A New Turbocharger Needs Protection Before the Engine Even Starts

Installing a new performance turbocharger is one of the most effective ways to increase an engine’s power potential. But even a properly engineered turbocharger depends on one critical factor from the moment it is installed:

Proper lubrication.

Before a new or replacement turbocharger reaches normal operating conditions, the turbo’s bearing system must receive adequate lubrication. During normal engine operation, pressurized engine oil continuously supplies the turbocharger.

Immediately after installation, however, that oil supply has not yet been fully established inside the turbocharger.

That makes proper turbocharger pre-lubrication and oil-system priming before initial startup an important part of the installation process.

LIQUI MOLY developed Pro-Line Turbocharger Additive specifically as a pre-lubricant for new and replacement turbochargers. The product is designed to provide lubrication during the critical initial operating period and help protect the turbocharger against insufficient lubrication during startup.

At Tomioka Racing, we recommend making turbocharger pre-lubrication part of every new turbo installation.

Why Does a Turbocharger Need Engine Oil?

A turbocharger uses exhaust energy to spin a turbine wheel, which is connected by a shaft to the compressor wheel.

As exhaust flow increases, the rotating assembly accelerates rapidly and allows the compressor to force additional air into the engine.

The turbocharger’s bearing system depends on a continuous supply of clean engine oil.

Engine oil performs several important functions inside the turbocharger:

• Lubricates the turbocharger bearing system
• Reduces friction between moving components
• Helps carry heat away from the center housing
• Protects components during acceleration and deceleration
• Supports long-term bearing and shaft reliability

Without adequate lubrication, unnecessary friction and heat can develop within the turbocharger’s center section.

That is why the condition of the engine oil, turbo oil feed system and oil drain system are just as important as the turbocharger itself.

What Happens During the First Startup of a New Turbo?

Consider what happens immediately after installing a new turbocharger.

The engine contains oil, but the turbocharger and its oil passages may not yet have an established supply of pressurized engine oil.

When the engine begins running, oil pressure must build and oil must travel through the turbocharger’s oil feed system before normal lubrication is established.

That creates a short but important lubrication window.

Proper turbocharger installation procedures therefore include preparing the turbocharger with lubrication before initial startup and establishing engine oil flow before allowing the turbocharger to operate normally.

The principle is straightforward:

Do not allow a newly installed turbocharger to begin operating without adequate lubrication.

This is where turbocharger pre-lube becomes valuable.

What Is Turbocharger Pre-Lube?

Turbocharger pre-lube is lubrication applied directly to the turbocharger during installation before normal pressurized engine oil flow is established.

Instead of relying only on engine oil to reach a newly installed turbo after startup, pre-lubrication places lubricant directly where it is needed beforehand.

This provides an additional layer of protection during the transition between installation and normal engine operation.

For this reason, Tomioka Racing recommends incorporating turbocharger pre-lubrication into the installation procedure for new and replacement turbochargers.

LIQUI MOLY Pro-Line Turbocharger Additive

One product specifically designed for this application is LIQUI MOLY Pro-Line Turbocharger Additive.

Despite the word “additive” in the product name, this is not simply a general-purpose engine-oil treatment.

It is designed specifically for pre-lubricating new and replacement turbochargers.

According to LIQUI MOLY, the product helps protect turbochargers from insufficient lubrication during the initial running-in period and provides lubrication before the engine’s normal oil supply is fully established at the turbocharger.

The product is supplied in a convenient 20-gram tube, making it well suited for use during a turbocharger installation.

How Is LIQUI MOLY Turbocharger Additive Used?

LIQUI MOLY specifies that the product is applied directly to the turbocharger’s oil intake passage before the oil supply line is connected.

The goal is to ensure lubricant is already present inside the turbocharger before initial startup.

A general turbo installation process should include attention to the following areas:

1. Inspect the Turbo Oil Feed System

Make sure the turbocharger oil feed line is clean, unrestricted and undamaged.

A new turbocharger cannot operate correctly if the engine cannot supply it with sufficient oil.

2. Inspect the Turbo Oil Drain

The turbocharger oil drain must allow oil to return freely to the engine.

Restrictions, improper routing or contamination can negatively affect turbocharger operation.

3. Pre-Lubricate the Turbocharger

Apply the appropriate turbocharger pre-lubricant through the turbo oil inlet according to the product and turbocharger installation instructions.

For LIQUI MOLY Pro-Line Turbocharger Additive, the product is applied before connecting the turbocharger oil supply line.

4. Complete the Oil Feed Connection

Install the turbocharger oil feed line correctly and verify all fittings, seals and connections.

Make sure the line is not twisted, damaged or improperly routed.

5. Prime the Engine Oil System

Follow the appropriate vehicle and engine procedure for building oil pressure before allowing the engine to start normally.

The exact procedure varies by vehicle, engine and turbocharger application.

6. Perform the Initial Startup

Once the installation and priming procedures are complete, start the engine according to the applicable installation instructions.

Do not immediately rev the engine.

Allow the engine to operate normally while inspecting the installation.

7. Check for Leaks

Inspect the turbocharger installation for:

• Engine oil leaks
• Coolant leaks where applicable
• Intake or charge-pipe leaks
• Exhaust leaks
• Loose fittings or connections

Correct any issue before operating the vehicle under load.

8. Verify Engine Oil Level

After the initial startup and inspection, verify the engine oil level and correct it if necessary.

Turbo Pre-Lube Does Not Replace Proper Oil-System Priming

This is an important distinction.

Using turbocharger pre-lube does not eliminate the need to properly prime the engine’s oil system.

The two procedures perform different but complementary functions.

Turbocharger pre-lube places lubricant directly inside the turbocharger before initial operation.

Oil-system priming establishes oil flow and pressure from the engine to the turbocharger.

For a properly prepared turbo installation, both should be treated as part of the overall first-start procedure.

Simply installing a turbocharger and immediately starting the engine without considering lubrication and oil flow creates unnecessary risk.

Don't Ignore the Turbo Oil Feed Line

When installing a replacement turbocharger, one of the most important questions is:

Why did the previous turbo fail?

Replacing the turbocharger without identifying an underlying lubrication, engine or installation problem may result in another failure.

The oil feed system deserves particular attention.

Inspect for:

• Restricted oil feed lines
• Contaminated engine oil
• Incorrect engine oil
• Damaged or kinked oil lines
• Restricted turbo oil drains
• Excessive crankcase pressure
• Foreign-object damage
• Intake system leaks
• Exhaust system leaks
• Improper boost control
• Incorrect installation

A turbocharger pre-lube is designed to assist with lubrication during initial installation and startup.

It cannot compensate for a restricted oil supply, contaminated engine oil or another mechanical problem.

Start With Fresh, Proper Engine Oil

Turbocharger reliability is closely tied to the quality and condition of the engine oil supplying it.

When installing a new turbocharger, verify that the engine oil is suitable for the application and in good condition.

For many installations, replacing the engine oil and oil filter at the time of turbocharger replacement is a sensible part of the overall service procedure.

Modified and high-performance engines may also have different oil requirements than completely stock vehicles.

Always follow the engine builder, vehicle manufacturer and applicable Tomioka Racing recommendations for your specific setup.

Why Tomioka Racing Recommends Turbo Pre-Lube

Performance enthusiasts spend significant time researching:

• Compressor wheel sizes
• Turbine configurations
• Horsepower capability
• Boost pressure
• Wastegate setup
• Tuning
• Supporting modifications

But installation preparation deserves the same attention.

Whether you are installing an OEM-style replacement turbo or upgrading to a higher-performance Tomioka Racing turbocharger, proper lubrication before initial startup is a simple step that can help protect your investment.

That is why Tomioka Racing recommends LIQUI MOLY Pro-Line Turbocharger Additive as a turbo installation companion for new and replacement turbochargers.

Its purpose is simple:

Put lubrication where the turbo needs it before the engine is asked to supply it.

LIQUI MOLY states that Pro-Line Turbocharger Additive is compatible with commercially available motor oils and suitable for 4-stroke gasoline and diesel engines.

Turbocharger Installation Is a Complete System

A performance turbocharger should never be viewed as an isolated component.

Turbo reliability depends on the entire system working correctly:

Turbocharger + Engine Oil + Oil Supply + Oil Drain + Cooling + Air Supply + Exhaust Flow + Boost Control + Proper Installation

This becomes even more important on modified vehicles operating beyond factory power levels.

When upgrading a turbocharger, Tomioka Racing recommends treating the installation as an opportunity to inspect the complete turbo system.

Check the supporting components.

Inspect the oil feed.

Verify the oil drain.

Use the correct engine oil.

Pre-lubricate the turbocharger.

Prime the engine oil system.

Check for leaks.

Then begin the appropriate tuning, inspection and break-in procedures for the vehicle.

A few additional minutes spent preparing the lubrication system can help protect a significantly larger investment.

Frequently Asked Questions About Turbocharger Pre-Lubrication

Do I Need to Prime a New Turbo Before Starting the Engine?

Yes. A newly installed turbocharger should be properly pre-lubricated, and the engine oil system should be primed according to the applicable vehicle, engine and turbocharger installation procedures.

The goal is to establish lubrication before the turbocharger is subjected to normal operation.

What Is Turbocharger Pre-Lube?

Turbocharger pre-lube is lubricant applied directly to a new or replacement turbocharger before initial startup.

It helps provide lubrication during the period before normal pressurized engine-oil flow is fully established.

Where Does LIQUI MOLY Turbocharger Additive Go?

LIQUI MOLY Pro-Line Turbocharger Additive is applied through the turbocharger’s oil intake passage before the oil supply line is connected.

Always follow the current product application instructions.

Do I Pour LIQUI MOLY Turbocharger Additive Into the Engine?

Its intended turbocharger installation application is directly through the turbocharger oil intake passage before connecting the oil supply line.

It should not be treated simply as a general crankcase additive for this application.

Does Turbo Pre-Lube Replace Priming the Engine?

No.

Turbo pre-lube and oil-system priming should be viewed as complementary installation procedures.

Pre-lube provides lubrication at the turbocharger, while priming establishes engine oil flow and pressure.

Can Turbo Pre-Lube Prevent Every Turbo Failure?

No.

Turbo pre-lube is intended to help protect the turbocharger during initial lubrication and startup.

It cannot correct problems such as:

• Blocked oil passages
• Contaminated oil
• Incorrect installation
• Foreign-object damage
• Excessive crankcase pressure
• Incorrect boost control
• Engine-related failures

Proper diagnosis and installation remain essential.

Should I Use Pre-Lube With a Tomioka Racing Turbo?

Tomioka Racing recommends incorporating proper turbocharger pre-lubrication into the installation of a new TR turbocharger.

LIQUI MOLY Pro-Line Turbocharger Additive 20g provides a convenient dedicated pre-lubrication solution for this purpose.

Protect Your Turbo From the First Revolution

A performance turbocharger is engineered to operate under demanding conditions once the engine and lubrication system are functioning correctly.

But initial startup is different.

Before normal oil flow has been established, the installer has an opportunity to provide additional protection through proper turbocharger pre-lubrication and oil-system priming.

For Tomioka Racing customers, we recommend making turbo pre-lube part of the installation process rather than an afterthought.

TR Recommended Installation Companion

LIQUI MOLY Pro-Line Turbocharger Additive – 20 g

Designed for pre-lubricating new and replacement turbochargers before initial startup.

Installing a new Tomioka Racing turbo? Add one to your turbo order and protect your investment from the first startup.

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Technical Note: Installation procedures vary between engines, vehicles and turbocharger systems. Always follow the current Tomioka Racing installation instructions along with applicable vehicle, engine and product manufacturer procedures.