Checking the basic position of the camshafts of the 612 series engine
1. Illustrative material for checking the basic position of the camshafts of the 612 series engine is presented in the illustration, to which all references in the text refer.
2. Remove the injectors (Y76) (see Chapter Removal and installation of fuel distribution line and injectors).
3. Remove the cylinder head cover.
4. Turn the crankshaft in the normal direction, bring the piston of the first cylinder to the TDC position - the marks on the camshaft and its bearing cap should align.
5. Lock the camshafts using a special rod (3) inserted through the hole in the first shaft bearing cap and inserted into the hole (A) in the gear (2) of the intake camshaft.
6. When the basic installation is correct, the marks (B) of the camshaft gears (1 and 2) should be aligned. In addition, the marks applied to the shaft bodies and their bearing caps (arrows) should be aligned.
7. If necessary, remove the camshafts (see Section Removal and installation of timing components) and install them in place, ensuring that the marks are aligned correctly.
8. Reinstall the removed components in the reverse order of removal.
M628
Setting the base position of the camshafts of the 628 series engine
1 - Intake camshaft gear; 2 - Exhaust camshaft gear; 3 - Intake camshaft; 4 - Exhaust camshaft; 5 - Chain tensioner; B - Installation marks
1. Illustrative material on adjusting the base position of the camshafts of the 628 series engine is presented in the illustration, to which all references in the text refer.
2. Remove the cylinder head covers.
3. Turn the crankshaft in the normal direction, bring the piston of the first cylinder to the TDC position.
4. Check the basic position of the camshafts - the gears should be turned with the marks (B) towards each other, in addition, the marks applied to the shaft bodies and their bearing caps (arrows) should be aligned.
5. Make appropriate adjustments if necessary.
6. Reinstall the removed components in the reverse order of removal.