Checking camshaft timing - AR05.20-P-6015HB

ENGINE 604, 605, 606 

Fig 1: Identifying Camshaft Timing Assembly

	When carrying out removal and installation work, it is sufficient if the basic position of the camshafts is checked. Only check the timing of the camshafts if it is certain that the setting of the TDC pointer is correct, if necessary ↓		AR05.20-P-6010HA
	inspect setting of TDC pointer bracket, correct		AR03.00-P-1101HA
	Removing, installing
1	Remove cylinder head cover		AR01.20-P-5014HA
2	Remove viscous fan clutch	Engine 605, 606 in model 124 Engine 606.961 in model 140 Engine 605 in model 202 Engine 605, 606 in model 210	AR20.40-P-5660HB
		Engine 604 in models 202, 210	AR20.40-P-5660HA
		Engine 606 in model 463	AR20.40-P-5660GG
	Checking
3	Check camshaft code numbers	The camshaft code numbers are shown at the thrust collar of the axial bearing	*BE05.20-P-1001-01A
4	Attach dial gage holder (02) to the intake side of cylinder 1 to the cylinder head	Insert threaded pin into M6 hole of cylinder head cover attachment for this step. Screw nut (01) (part no. 102 990 01 51) onto threaded pin. Screw dial gage holder (02) onto nut (01) with magnetic foot removed.
		Threaded pin	Figure
		Dial gage holder	Fig 4
5	Position inlet cams of cylinder 1 so that only the base circles are making contact with the bucket tappets
6	Attach dial gage (03) with tracer pin (04) to dial gage holder		Dial gage Fig 3
7	Set a preload of 3 mm and an angle of 90° of tracer pin (04) to bucket tappet
8	Use socket wrench bit to rotate the crankshaft in direction of rotation of engine until a valve stroke of 2 mm is indicated	Socket wrench bit	Fig 5
9	Check reading (arrow) at the vibration damper	At valve lift of 2 mm, the reading at the vibration damper should agree with the figure as in the table	*BE05.20-P-1001-02A
10	Install in the reverse order

Camshaft code numbers

Number	Designation		Engine 604	Engine 605 except 605.960/962	Engine 606 except 606.961/962/964
BE05.20-P-1001-01A	Camshaft code numbers	inlet	11	11	08
		exhaust	10	08	07

Camshaft code numbers

Number	Designation		Engine 605.960/ 962	Engine 606.961/ 962/964
BE05.20-P-1001-01A	Camshaft code numbers	inlet	14	11
		exhaust	08	07

Timing

Number	Designation				Engine 604, 605.910/ 911/912, 606.910/ 912	Engine 605.960/ 962	Engine 606.961/ 962/964
BE05.20-P-1001-02A	Timing of inlet valve/ exhaust valve at 2 mm valve stroke and used timing chain	inlet valve	opens after TDC	° CRA	12	12	12
			closes after BDC	° CRA	13	0	0
BE05.20-P-1002-02A	Timing of inlet valve/ exhaust valve at 2 mm valve stroke and used timing chain	exhaust valve	opens before BDC	° CRA	25	25	25
			closes before TDC	° CRA	14	14	14

Fig 2: Identifying Threaded Pin (116 589 01 34 00)

Fig 3: Identifying Dial Gage (001 589 53 21 00)

Fig 4: Identifying Dial Gage Holder (363 589 02 21 00)

Fig 5: Identifying Socket Wrench Bit (001 589 65 09 00)