The turbocharger is one of the most delicate components in the engine system and, therefore, among the most vulnerable to failures, often caused by external factors. One of the most common, yet most underestimated, problems is lack of lubrication.
Why Lubrication Is Essential
A turbocharger can reach speeds exceeding 200,000 rpm. Under these operating conditions, oil plays a vital role, ensuring both lubrication and cooling of the unit. In particular:
- It ensures separation between metal surfaces, preventing direct friction
- It helps dissipate the heat generated by high speeds
Without adequate oil pressure, this balance is disrupted: the surfaces come into contact, and within seconds, significant damage to the turbocharger can occur.
The Effects of Insufficient Lubrication
When oil is not properly supplied to the turbo, damage occurs rapidly and is easily recognizable. Among the main technical consequences are:
- Abnormal temperature increase, often visible in the discoloration of the turbine wheel shaft.
- Accelerated wear of the bushings, due to direct contact between the surfaces
- Excessive play of the rotor shaft, with possible contact between the impellers and the casing
If not promptly addressed, these phenomena lead to complete failure of the turbocharger.
The main causes of lack of lubrication
In most cases, lubrication failure is not caused by the turbo itself, but by external conditions related to maintenance or installation. The most common causes include:
- Inadequate oil filter maintenance
- Insufficient oil level
- Use of lubricants that do not meet the required specifications
- Carbon deposits in the oil passages
- Oil delivery hose clogged, kinked, or partially damaged
- Cold acceleration without adequate engine warm-up
- Failure to pre-lubricate the turbocharger during installation
How to Prevent Turbo Failure
To avoid lubrication problems, it is essential to:
- Regularly check the oil level and pressure
- Use only oil with the correct specifications
- Always replace the oil filter with quality components
- Clean or replace the oil delivery hose when replacing the turbo
- Pre-lubricate before starting
- Always identify the cause of the failure before installing a new turbocharger
Watch the full video
For a detailed technical analysis with practical examples and visual analysis of damaged components, watch the full video: