exhaust gas recirculation radiator · the egr radiator is made either of stainless steel or...

EXHAUST GAS RECIRCULATION RADIATOR

PARTS EXPERTISE FROM BEHR HELLA SERVICE

The modern Behr Hella Service exhaust gas recirculation radiators (EGR radiators) make it possible to achieve the tough Euro 6 limit values regarding emissions of nitrogen oxide (NOx). They are elements of the extensive Behr Hella Service vehicle part range, which covers the areas of cooling, air-conditioning and ventilation. Behr Hella Service thus offers an exceptional performance package: thanks to our partner BEHR, we can provide superior OEM expertise combined with a complete product portfolio. Furthermore, the aftermarket and workshops in the independent aftermarket sector benefit from the HELLA global logistics network, which guarantees high part availability.

EXHAUST GAS RECIRCULATION RADIATOR: FUNCTION

Exhaust gas recirculation radiators operate along the lines of the following functional principle: One part of the main gas stream between the exhaust manifold and the turbocharger is fed to a special heat exchanger (=EGR radiator) where it is cooled and then once again redirected to the intake air. Through the cooling the combustion temperature in the engine drops, thus bringing about a reduction of the amount of nitrogen oxide.

EXHAUST GAS RECIRCULATION RADIATOR: CONSTRUCTION

The EGR radiator is made either of stainless steel or aluminium and is mounted near the engine. Both the hot exhaust gases and also the coolant can flow into the radiator via the several connections available. After the exhaust emissions have cooled down, they are removed from the radiator in metered amounts via the air intake system and then returned to the combustion chamber. This leads to a reduction of nitrogen oxide output upstream of the catalytic converter.

Pneumatic and/or electrical actuators on the EGR radiator see to the metering or controlling of the exhaust gas recirculation rate from the radiator to the combustion chamber.

EXHAUST GAS RECIRCULATION RADIATOR: POSSIBLE CAUSES OF FAILURE

Preliminary points The exhaust gas recirculation radiator is not one of the classic wearing parts. Nevertheless, it can be potentially affected by a variety of defects which then lead to interrelated failures:

➔ Extreme temperature fluctuations and, similarly, a lack of coolant additives or ones which are aggressive can cause leaks (both internally and externally).

➔ But, first and foremost, it is a gradual loss of coolant which points to a leaking EGR radiator - frequently in connection with an increased engine temperature.

The dangerBecause of the higher exhaust gas counter-pressure in comparison to the coolant pressure, when the engine is running the loss of coolant or the leakage is initially not noticed. When the engine is restarted, mechanical damage can be done to the engine component as a result of an accumulation of coolant leading to "a water hammer effect" taking place.

Cracks in the EGR radiator mean that the exhaust gas pressure can escape unchecked. The result is decreasing engine performance caused by a lack of boost pressure.

Other causes of failure are leaks, torn diaphragms and electrical or mechanical faults occurring in the actuators used. Furthermore, coking of the EGR radiator can also result in malfunctioning and breakdowns.

EXHAUST GAS RECIRCULATION RADIATOR: OPERATING PRINCIPLE

Many of the faults mentioned are registered by the electronic control unit, which subsequently causes the engine lamp to light up.

Practical tips on troubleshooting can be found in HELLA TECHWORLD - see the website link below.

www.hella.com/techworld

Turbocharger

Exhaust gas cooler

AGR

LLK

LLK

Cool

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Low

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pera

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cool

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Fresh air

Charge air High-temperature circuit Exhaust emission Low-temperature circuit

Diesel particulate filter

Turbocharger

Low-pressure charge-air cooler

High-pressure charge-air cooler

Part number Description Vehicle application VERSION * OE numbers**

8ME 376 701-671 Exhaust gas recirculation radiator VAG A1, Fabia, Rapid, Polo produced by Visteon ■ 04B131512D

8ME 376 745-261 Exhaust gas recirculation radiator BMW 3 (E46), 5 (E60) produced by BEHR ■ 11717789790

7789790

8ME 376 745-271 Exhaust gas recirculation radiator Ford Mondeo / Citroen DS produced by BEHR ■

1861749DS7Q9D475DA9807593080

8ME 376 745-291 Exhaust gas recirculation radiator VW Passat / Audi A3 produced by BEHR ■

4L131512BH4L131512BQ4L131512D

8ME 376 745-301 Exhaust gas recirculation radiator BMW 3 (E46) produced by BEHR ■ 11717787404

7787404

8ME 376 745-341 Exhaust gas recirculation radiator BMW 1, 3 (E90), 5 (E60) produced by BEHR ■ 11717797371

7797371


7800653


7805189

8ME 376 745-371 Exhaust gas recirculation radiator BMW 3 LCI (E90), 5 (F10) produced by BEHR ■ 11717805446

7805446

8ME 376 745-381 Exhaust gas recirculation radiator BMW 3 LCI (E90), 5 (E60) produced by BEHR ■ 11717810166

7810166

8ME 376 745-391 Exhaust gas recirculation radiator BMW X3 (E83) produced by BEHR ■ 11717805717

7805717

8ME 376 745-401 Exhaust gas recirculation radiator Mercedes Actros MP4 produced by BEHR ■ A4711405175

4711405175

8ME 376 750-761 Exhaust gas recirculation radiator BMW X3 produced by BEHR ■ 11717794245

7794245

8ME 376 780-721 Exhaust gas recirculation radiator Iveco Daily produced by BEHR ■ 504317815

8ME 376 908-131 Exhaust gas recirculation radiator Citroen C5, Xsara, Jumpy ■ 1628KC

8ME 376 908-141 Exhaust gas recirculation radiator Ford C-MAX, Focus, Mondeo ■12333813M5Q-9F464-AA161835

For further differentiation, please see information from Behr Hella Service catalogues, TecDoc and also the manufacturer's specifications. This list is not exhaustive and may contain errors. * More information can be found online at www.behrhellaservice.com/premiumline ** OE numbers are only for comparative purposes

PRODUCT OVERVIEW

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exhaust gas recirculation radiator · the egr radiator is made either of stainless steel or...

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