1.5L REVOTORQ ENGINE 45 Connect compression tester to adapter and tighten vent knob. Crank the engine with starter motor by 200250 rpm approximately. Pressure gauge needle will start rising. Continue cranking till gauge needle stops rising any further. Note down the reading. Loosen vent knob to make sure the tester needle returns to zero. Repeat this operation for remaining cylinders. Minimum compression pressure in each cylinder should be 22 ± 1 bar. Low compression pressure may be due to leakage past valves / piston rings / blown cylinder head gasket. To ascertain the point of leakage, spray small quantity of clean engine oil in to cylinder showing low pressure. If it improves, wear in piston rings / cylinder bore is indicated. If it does not, leakage past the valves is indicated. If compression pressure of adjacent cylinder is also on lower side and equal, it may be due to blown cylinder head gasket. d. Fuel System Check the Fuel system for fuel flow. If the flow is restricted change the filter/ rectify the defect. e. Clutch Slippage Clutch slipping can be confirmed by any of the following two methods: Drive the vehicle with normal load in 3rd gear on level ground and let the speed drop down to approximately 20 kmph. Now press accelerator pedal fully. With slipping clutch the vehicle speed will not pick up and also clutch burning smell will be noticed. If this does not occur and vehicle picks up speed, it indicates that clutch does not slip. f. Brake Binding During driving apply brakes number of times and then shift gear to neutral position and check free rolling of vehicle. Check brake drums/brake discs for overheating and if necessary jack up the vehicle and check wheels for free rotation. g. Turbocharger Check for Tuning 1. Check intactness of actuator rod end. 2. Collapsed or restricted air pipe before turbo 3. Check for crank bent or actuator rod bend or hose pinch. 4. Restricted or damaged cross over pipes turbo to inlet manifold 5. Foreign object between air cleaner and turbo 6. Compressor./ Turbine Wheel damage due to Foreign object entry 7. Turbine bolts, Compressor bolts, actuator bracket bolts, or Clamps loose. 8. Check Air filter for any blockage 9. Check for excessive back pressure. If not OK the turbo charger must be replaced. Check Turbocharger compressor wheel damage 1. Disconnect Compressor Air inlet pipe. 2. Inspect compressor wheel blade. 3. There should be no visible damage. If damaged, the turbo charger must be replaced The entire air circuit must be cleaned or changed to avoid new failure in case of foreign object The foreign object can be found in the heat exchanger Check Turbocharger rotor movement 1. Check rotor movement, it should spin freely. 2. There should be no trace of contact with housing. If not OK the turbo charger must be replaced Check Turbocharger Turbine wheel damage 1. Disassemble Turbocharger or exhaust gas connection. 2. Inspect turbine wheel rotor damage. you need to look behind the blades, damages are often located in tip area If damaged, the turbo charger must be replaced The foreign object can be found in the catalyst or in the particulate filter
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