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© 200324 3-11 Inspection and adjustment XE ENGINE CF65/75/85 series 2 8 3.8 INSPECTION, ENGINE COMPRESSION PRESSURE } Be careful when working on an engine at operating temperature. Hot lubricating oil may escape from the engine when it is run without the valve covers. Make sure you are adequately protected. A compression measurement is a quick check of the sealing of the valves and the head gasket, and of the sealing between the cylinder liner and the piston rings. The results of the measurements can only be used to compare the cylinders with each other. 1. Bring the engine up to operating temperature. 2. Remove the engine management system supply fuse or supply relay, so that the pump units cannot be activated. 3. Remove the valve covers. See "Removal and installation". 4. Remove the injectors. 5. Turn the engine a number of times using the starter motor, so that any carbon or dirt particles in the cylinder are removed. 6. Fit the dummy injector (DAF no. 1329306), compression gauge (DAF no. 1329301) and adapter (DAF no. 0694972). 7. Carry out the measurement by rotating the engine using the starter motor, until the gauge reading no longer rises. For the pressure differences permitted between individual cylinders see "Technical data". 8. Remove the dummy injector and fit the injectors. 9. Fit the valve covers. See "Removal and installation". 10. Fit the fuse or relay. |