Hybrid Turbo VAG 1.9 TDI 110 hp – 028145702T, 701854-2

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Hybrid
HYB17-300-268
Year: September 1996 to January 2004
Power: 110 hp
displacement: 1.9 L
Engine code: 1Z, AFN, AGR, AHU, ALE, ALH, ASV
Exchange
Gasket kit
Preparation course
€300.00 VAT included

250 tax excl.

Quantity
Manufacturing time: 15-20 working days

Description

This hybrid turbo for for VAG engines 1.9 TDI features d a modification designed to adapt the d air flow of the turbocharger. The three documented specifications utilise a high-flow MFS compressor wheel, a 360° bearing retainer and high-speed balancing on a Cimat VSR bench.

Available configurations include the SEAT, Córdoba Vario, as well as the Volkswagen, Caddy II, Polo III Classic and Polo Variant. Compatibility must be confirmed using the original turbo part number d.

Available upgrades — Stage 1, Stage 2 and Stage 2+

Stage 1
Compressor wheel: MFS high-flow
Thrust bearing: 360°
Balancing: high-speed at 150,000 rpm on a Cimat VSR test bench

This modification primarily affects the compressor impeller in order d to adjust the compression capacity and the air flow rate d. The final performance depends on the engine configuration and its electronic control system.

Stage 2
Compressor wheel: MFS high-flow oversized
d' intake housing: re-profiled for accommodate the new impeller
Thrust bearing: 360°
Balancing: high-speed at 150,000 rpm on a Cimat VSR test bench

The oversized impeller requires the intake housing to be re-profiled d. This combination may alter the air flow rate d and the response time; it must be used in conjunction with appropriate engine tuning.

Stage 2+
Compressor wheel: MFS high-flow oversized
Intake housing d: re-profiled for to accommodate the new impeller
Thrust bearing: 360°
Balancing: high-speed at 150,000 rpm on a Cimat VSR test bench

for ’s documented specifications for this variant include the oversized impeller, the re-profiled housing, the 360° thrust bearing and VSR balancing. The available data do not specify d any other mechanical modifications.

What is a hybrid turbo?

A hybrid turbo retains an architecture suited to the engine in question whilst incorporating internal modifications. Depending on the specification, these may relate to the compressor wheel, its dimensions, the geometry of the blades, the housings, the turbine wheel or the thrust bearing system.

The aim is d to adapt the compression capacity and the air flow rate d. A hybrid turbo is therefore not defined solely by the appearance of its compressor wheel: the compatibility between the components, their machining and their balancing is essential.

MFS compressor wheel: standard or Performance?

MFS stands for ‘Milled From Solid’, meaning a wheel machined from a solid block. This manufacturing process alone does not guarantee an increase in airflow d'air. A standard MFS wheel can retain a geometry equivalent to the d'original.

An MFS impeller Performance can be given a geometry tailored to the intended application, for example a specific profile, dimensions or blade configuration, provided these elements are documented. A standard MFS impeller can be as polished as an MFS impeller Performance. It is not its appearance that determines its performance, but its geometry and its ability to move more d air.

Why does the geometry of the blades influence the airflow d?

The compressor impeller draws in and then compresses the air sent to the engine. Its diameter, profile, height, width and the arrangement of its blades influence its aerodynamic behaviour. A suitably designed geometry can move more d air under certain conditions, although a larger impeller does not automatically guarantee better performance.

The result also depends on the compressor housing, the turbine section, the boost pressure and the engine tuning. In particular, an increase in size can alter the response time and the range d of optimal operation.

Reliability and balancing of the hybrid turbo

The documented 360° bearing stop helps to distribute axial forces around the assembly. However, it does not eliminate the need d for proper lubrication or d for correct installation.

The rotor is balanced at high speed, up to 150,000 rpm, on a Cimat VSR test bench. This process aims to minimise vibrations and mechanical stresses, but does not protect the turbocharger against insufficient lubrication, contamination or an installation error d.

Engine remapping and preparation

Appropriate engine management is required for to make the most of the characteristics d of a hybrid turbo. The mapping, boost pressure, wastegate adjustment, fuel injection, intake air cooling d, the exhaust and the transmission must be checked or adjusted according to the configuration. Fitting the turbo alone does not guarantee a power gain.

Turbo part numbers

OEM part numbers

028145702TX
028145702T
028145702NX
028145702N
028145702NV
028145702NV500
028145702NV225

Manufacturer’s part numbers

701854-0002
701854-0003
701854-0004
701854-2
701854-2004
701854-3
701854-4
701854-5004S
701854-5005S
706712-0001
706712-1
706712-2001
706712-5001S

Compatible vehicles and applications

SEAT
Córdoba Vario Estate Van (6K5) LCV — 110 hp
Diesel 1.9 TDI — 08/2000 to 12/2002
Engine code : ASV
Volkswagen
Caddy II Box Body/MPV (9K9A) LCV — 90 hp
Diesel 1.9 TDI — 09/1996 to 01/2004
Engine codes: 1Z, AHU, ALE, ALH
Polo III Classic (6V2) / Flight — 90 hp
Diesel 1.9 TDI — 09/1996 to 09/2001
Engine codes: AGR, AHU, ALE — AHU documented from 01/1997 to 10/1997
Polo III Classic (6V2) / Flight — 110 hp
Diesel 1.9 TDI — 06/1998 to 01/2002
Engine codes: AFN, ASV
Polo Variant (6V5) — 90 hp
Diesel 1.9 TDI — May 1997 to September 2001
Engine codes: AGR, AHU, ALE — AHU documented from May 1997 to October 1997
Polo Variant (6V5) — 110 hp
Diesel 1.9 TDI — 06/1998 to 09/2001
Engine codes: AFN, ASV

Additional technical specifications

Product type: hybrid turbo
Engine: VAG 1.9 TDI
Fuel: diesel
Power Rated power: 110 hp
Documented engine codes: 1Z, AFN, AGR, AHU, ALE, ALH, ASV
Documented production periods: 09/1996 to 01/2004 depending on application

Fitting instructions

⚠️ WARNING — IMPORTANT BEFORE INSTALLATION

Identify and rectify the cause of the previous fault before d installing the turbo.

Check the lubrication circuit, as well as the oil supply and return lines d. Check that the pipes and the inlet are clean and free from foreign objects.

Carry out the priming procedure in accordance with the applicable recommendations and follow the manufacturer’s instructions. The mapping and adjustment of the wastegate must be carried out by a qualified professional.

Unresolved lubrication issues may lead to further turbocharger failure.

How do you identify the correct turbo?

Check the part number marked on the turbo d the original, OEM and manufacturer part numbers, as well as the make, model, generation, body style, engine type, power output, years of manufacture and engine code. An identical engine may have several different configurations.

⚠️ Check your turbo’s part numbers

Before ordering, compare the part number marked on your original turbo d with the part numbers listed in this specification sheet. An identical engine specification does not always guarantee compatibility.

If in doubt, contact our team with the full part number taken from your turbo.

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How do you identify the correct turbo part number?

A single engine type may have been fitted with several different turbochargers depending on theYear, power output, engine version or technical evolution.. The application alone is therefore not always sufficient for to accurately identify the correct turbo.

Before ordering, note down the part numbers shown on the identification plate d of your old turbocharger. This may be d an OEM part number or d a part number from the turbo manufacturer.

Compare these part numbers with those listed on our product pages.. If in doubt, our team can help you verify the part number you are looking for before you place your order.

Turbo failure: identify the cause before replacement

A loss of power, an unusual whistling noise, oil consumption d, abnormal smoke or poor engine performance may be linked to a turbocharger fault.

However, a fault that appears to be turbo-related may also stem d from a lubrication issue, d from contaminated oil, d from a foreign object, from the intake or exhaust systems, or d from another engine peripheral component.

It is therefore important to investigate the cause of the fault before fitting a new turbo or a new Cartridge.

→ Identifying the symptoms d of a turbo failure

→ Understand the main causes of turbo failure d

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BEFORE REPLACING A TURBO

A turbocharger failure may be the result d of another engine problem. Before fitting d a new turbo or Cartridge, identify and rectify the cause of the original fault to d avoid d damaging the new part.

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