Important: Injectors and high-pressure pumps are intended for professional installation only.

Installation conditions for injectors and high-pressure pumps
PLEASE READ CAREFULLY

Injectors and high-pressure pumps are precision components intended for professional installation only.
Failure to follow the installation procedures and conditions below may result in damage to the part and may be grounds for rejecting a warranty claim (especially in cases of fuel system contamination, improper installation, or failure to follow the prescribed procedures).

1) Professional installation — mandatory standard

• Installation must be carried out by a qualified workshop with appropriate tools and diagnostic equipment.

• The manufacturer’s procedures must be followed (torque specifications, work sequence, cleanliness, coding, etc.).

• After installation, a leak test and functional check using diagnostics must be performed.

2) Fuel system cleanliness — a key condition

The most common cause of damage to both refurbished and new parts is a contaminated fuel system (metal debris/wear, water, dirt).
Before installation, the workshop must verify and ensure the system is clean and technically fit for use.

Recommended minimum (documentable steps)
For trouble-free operation and warranty claim assessment, we recommend (and in practice often require documented proof) that at least the following steps, or their equivalent, have been performed:

• Clean the fuel tank (or check for metal debris / water).

• Clean the entire fuel lines / flush the system.

• Install a new fuel filter — OEM-quality filter recommended.

• Clean the fuel rail including connections (and check a fuel sample after the filter).

• Check the feed (electric lift) pump — replace if faulty/contaminated.

• Check the high-pressure pump at a specialist diesel service (especially if metal debris is suspected).

• Fully bleed the fuel system.

• Enter injector calibration codes into the ECU (if required by the system).

• Perform basic settings/adaptations according to the system type (e.g., pump metering unit, fuel pressure sensor, pressure control valve).

Important: it is not enough to “just replace the injectors.” If metal debris or contamination is present, it can damage the new/refurbished part immediately or shortly after installation.

3) Coding/calibration and diagnostics after installation

For many systems, the following is required after installation:

• injector coding/calibration (e.g., IMA/ISA depending on the system),

• clearing fault codes and checking live data,

• checking corrections, pressures, and return flow/leak-off (depending on the system type).

Skipping these steps may cause poor engine operation and can significantly affect warranty claim assessment.

4) Warranty claim acceptance conditions (administrative)

• Acceptance of a warranty claim requires a fully completed claim form.

• If any additional costs arise in connection with the claim, the relevant documents must be attached on the day the claim is submitted. Later-submitted additional costs cannot be claimed retroactively.

5) What must be provided for a warranty claim

To assess the claim, you must provide in particular:

• An invoice/job sheet with a breakdown of work as proof of professional installation and compliance with the prescribed procedures (including related work on the fuel system).

Depending on the nature of the defect, we may also request:

• diagnostic report/printout (coding, fault codes, corrections),

• proof of fuel filter replacement,

• description of cleaning/flushing performed,

• information on the condition and inspection of the pump and other components.

6) Claim assessment and expert inspection (including manufacturer)

In technically complex cases (especially for new parts), we reserve the right to arrange an expert assessment outside our premises, including assessment by the manufacturer / authorized facility.
We will inform you about the progress and required steps.
Claim processing timeframes follow applicable legal regulations; if a longer period is required for expert assessment, we will contact you and agree on the next steps.

7) Additional explanation (why we insist on this)

This document is intended to highlight that it is not only about replacing a part, but about the condition of the entire fuel system.
Photo documentation (gallery) may include real examples of damage to pumps and their components, metal debris in the tank, and fuel contamination in the rail (i.e., after the filter, just before the injectors), which repeatedly destroys injectors.