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| Tighten the union nut of the auxiliary tool on the jammed nozzle and insert the extractor -MP1-230- on the welded nut. |
Note Store the auxiliary tool with dust protection for future use. |
Note Always replace the copper seals between the cylinder head and the injection nozzles. |
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| Replace the injection nozzles. |
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| Pay attention to the correct position of the brackets in the cylinder head. |
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| Insert clamp and tighten fixing screws. |
| Hollow screw for return-flow line (cylinder 3): 10 Nm |
| Specified value at idling speed: -2.80 mg/s up to +2.80 mg/s (milligram per stroke) |
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| Read off the measured values for the individual cylinders in the measured value block 13. |
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| If one or more measured values are outside the tolerance, interchange the injection nozzles (except for the nozzle of cylinder 3). |
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| If the fault migrates with the nozzle, replace the injection nozzle. |
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| If the fault remains on the cylinder, check the compression → Chapter. |
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| If the compression is O.K., replace the relevant connection fitting Pos. 11 with pressure valve and gasket ring on the injection pump → Chapter. |
Note t
| The gasket ring must be removed from the pump with a soft object (plastic, wood) as otherwise the contact surfaces may be scratched. |
t
| For mileages above 15 000 km replace the connection fitting with pressure valves per set only. |
This engine is fitted with 2 spring injection nozzles. This is why the injection of the fuel quantity occurs in 2 steps. If there is a problem with these injection nozzles they must be replaced, as neither a pressure adjustment nor a repair is possible. |
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