A C15 Caterpillar engine has dozens of torque specifications for many different engine bolts. The head bolts should be torqued at 350 pounds.
The solenoid on a Caterpillar C15 diesel engine can be found on top of the alternator. The solenoid is held on by four screws.
3406 C15 3208 3306
Caterpillar C15--2050 lb/ft of torque.
Peak torque on the c15 is between 1500-1700 rpm. Drag it down below 1400 under load and it starts lugging pretty bad
This can be easily be done in 8 hours.
The Caterpillar C15 diesel engine torque specifications for the rod bearings is 35 pounds. The main bearing torque specifications is 350 pounds.
See the related link below.
Tobii C15 is produced by Tobii Technologies in Sweden.
Most probably as they are both 1.9d, however the emmissions of the older engine might not be up to the mark to pass the MOT on a newer vehicle.
Your fuel pump is most likely mechanical, check where the fuel pump is bolted to the block and see if the seals have failed, otherwise it can only be massive fuel overconsumption where the excess flows into the crankcase.
Intake valve sensors.128 385 03