| Exhaust gas recirculation system |
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| The exhaust gas recirculation system is operated by the diesel direct injection system control unit -J248- via the EGR valve -N18- (except engine with engine identification characters BLS) integrated into the valve block to the mechanical exhaust gas recirculation valve. |
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| The mechanical exhaust gas recirculation valve with cone-shaped valve plunger makes it possible to achieve different opening cross-sections at different valve strokes. |
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| Any desired valve plunger position is possible as a result of the pulsed operation. |
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| The exhaust gas recirculation switches off at idling speed after about two minutes. |
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| When taking longer measurements, restart the engine or increase engine speed briefly to more than 1500 rpm. After this repeat the measurement. |
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| Secure all hose connections with corresponding hose clips. |
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| Replace self-locking nuts. |
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