Valve Clearance: Adjustments
CHECKING AND ADJUSTING VALVE CLEARANCEPrior to adjusting valve clearance, the following operations must be performed.
Operations carried out from above:
1. Remove intercooler.
2. Disconnect oxygen sensor plug.
Remove intercooler and air filter assembly.
Operations carried out from below:
1. Remove rear wheels
2. Remove final muffler (RH side)
3. Loosen and remove boost pressure control valve and return valve.
4. Loosen engine side paneling from below and remove. Move left-hand paneling with oxygen sensor cable to one side to keep it out of the way.
5. Pull of spark plug connector. Inlet and exhaust valve clearance cam only be checked and adjusted from below.
Note: To rotate the crankshaft, rotate only at the bottom pully or at the internal splines of the alternator shaft. After having completed the operations, check tight fit of hexagon head nut 50 ±5Nm on alternator shaft.
Always check or adjust the valve clearance with the engine cold (approx. 20 °C).
Check by inserting the feeler gauge between the end face of the stem and the cap of valve adjusting screw.
Valve clearance of cold engine:
Intake valve 0.1 mm
Exhaust valve 0.1 mm
The clearance is adjusted according to the firing order 1 6 2 4 3 5. The piston for the respective cylinder must be in TDC of compression stroke, since both valves are then closed. The TDC mark for each cylinder can be found on the pulley.
Cylinder Designation:
Adjusting
1. Cylinder 1 is the first to be adjusted. For this, turn the crankshaft to the right with the V-belt pulley until both valves of the cylinder are closed. (overlapping cylinder 4) or until the distributor are is aligned with the marking on the distributor housing. The TDC marking Z1 on the pulley must be level with the crankcase seam or the locating mark in the blower housing.
2. Check the valve clearance with P 213 b; if necessary, undo the hexagon nut on the adjusting screw and correct the valve clearance by turning the adjusting screw with a suitable screwdriver, hold the adjusting screw firmly and tighten the counternut.
3. Check the clearance again
4. Now, Continue turning the crankshaft clockwise with the pulley as far as the next marking (120°). The valves for cylinder 6 can be adjusted in this position.
5. Turn the crankshaft to the next marking (120°) to bring cylinder 2 to firing point.
6. Repeat this procedure accordingly to adjust the other valves (cylinders 4, 3, and 5)
7. Always replace the valve cover seals and the self locking nuts.
Tightening torque: 9.7Nm (7 ft lbs)