Diagnostics Problem reported The engine overheats.
The engine lacks power and operates erratically.
Possible cause
Recommended tests or actions
Notes
Defective water pump.
Check surface conditions and if necessary replace the pump (with a new gasket).
Faulty thermostat.
Replace the thermostat.
Scale formation in the water ways in the block and cylinder head.
Clean thoroughly. Follow standard instructions for the type of descaler used.
Water pump drive belt slack.
Check and adjust belt tension.
Insufficient coolant level.
Top up the coolant.
Incorrect engine timing.
Check timing and carry out accurate timing procedure.
Injection pump out of adjustment (over fueling or defect).
Correct pump outlet on test bed to adjust injection output to the stated value.
Air filter blocked.
Clean the air filter and replace if necessary.
Incorrect timing of the injector pump.
Check the timing and adjust the pump to the correct value.
Defective automatic advance mechanism.
Check operation on the injector Contact an approved Bosch agent. pump test rig If the values obtained do not accord with the recommended ones, replace the spring in the advance mechanism.
Defective cold start automatic advance device.
Adjust or replace the injector pump.
Excessive piston wear.
Overhaul the engine and replace worn components.
Incorrect adjustment of the speed regulator.
Check and accurately reset the regulator.
Nectis 207 – 12.2005 – GB
Contact an approved Bosch agent.
Contact an approved Bosch agent.
A2.31
