Removing/installing camshafts - AR05.20-P-6992HA

ENGINE 604, 605, 606 / 

Fig 1: Identifying Camshafts Components (1 Of 2)

Fig 2: Identifying Camshafts Components (2 Of 2)

Modification notes

1.3.95

Technical modification: Bolts for attaching camshaft housing discontinued The camshaft housing must be bolted onto the cylinder head when performing repairs.

Refer to Step 8

	Removing
1	Remove cylinder head cover		AR01.20-P-5014HA
2	Position piston of cylinder 1 to ignition TDC	Crank engine; do not rotate engine on Bolt for camshaft gear, do not rotate engine backwards. Marking of camshaft and camshaft bearing cap (arrows) must be aligned.
3	Lock inlet camshaft (6)	Insert retaining pin (1) through the 1st. camshaft bearing cap into the hole of the intake camshaft gear (2).
			Figure
4	Install retaining lock (7) for crankshaft / starter ring gear		AR03.30-P-5000HA
5	Mark camshaft gear (5) to timing chain	For all work in which the crankshaft should not be rotated, join up the camshaft gear (5) and timing chain by using tie wraps.
6	Remove chain tensioner (10)		AR05.10-P-7800HA
7	Disconnect and remove camshaft gear (5) from exhaust camshaft (7)	Note locating pin (3) (arrow). Take off camshaft sprocket (5) with the timing chain on.	Fig 4
8	Bolt for camshaft housing to cylinder head	Engines 604, 605, 606 as of 09/94 In order to prevent any damage (leakages at the seals between the camshaft housing and cylinder head) during the disassembly process, the camshaft housing must be bolted on to the cylinder head.	AR05.20-P-6992-10A
	Bolts for attaching camshaft housing to cylinder head discontinued		BT05.20-P-0001-01A
9	Unbolting camshaft bearing caps	Pay attention to marking on camshaft bearing caps!
		Engine 604	AR05.20-P-6992-05HA
		Engine 605	AR05.20-P-6992-05HB
		Engine 606	AR05.20-P-6992-05HC
10	Remove intake and exhaust camshafts (6, 7)
11	Remove dust shield collar (12)
	Installing
12	Install dust shield collar (12)	Install new seals. The tab on the dust shield's collar (arrow) must line up with the guide notch in the camshaft housing.
13	Install intake and exhaust camshafts (6, 7)	The camshafts are very sensitive to fracturing. Ensure they are installed free of stress. Installation  : Lubricate flat tappets and camshaft gear bearing positions, check flat tappets for freedom of motion. Align inlet and exhaust camshafts to axial bearing (arrows). Mount camshafts so that the two markings (13) in the camshaft gears are opposite each other and the markings on the camshaft and camshaft bearing cap line up (arrows).
		Note camshaft allocation! The camshaft code numbers are visible in each case on the thrust collar of the axial bearing.	*BE05.20-P-1001-01A
14	Mount camshaft bearing caps	Pay attention to marking of camshaft bearing caps!
		Engine 604	AR05.20-P-6992-05HA
		Engine 605	AR05.20-P-6992-05HB
		Engine 606	AR05.20-P-6992-05HC
		Mount camshaft bearing cap (8) in reverse order at the same location, tighten bearing cap screws evenly in steps of 1 rotation each.	*BA05.20-P-1002-01A
15	Lock inlet camshaft (6)	Insert retaining pin (1) through the 1st. camshaft bearing cap into the hole of the intake camshaft gear (2). The piston of the 1st. cylinder must be positioned at ignition TDC with locked camshaft.	Figure
16	Fit camshaft gear (5) to exhaust camshaft (7)	Installation:  Replace camshaft sprocket (4) bolts, note locating pin (3) (arrow). Install camshaft (5) with mounted timing chain and ensure that the colored markings on timing chain and camshaft gear are aligned.	Fig 4
			*BA05.20-P-1001-01A
17	Install chain tensioner (10)	Replace seal of chain tensioner (11).	AR05.10-P-7800HA
18	Check basic position of camshafts	If necessary, after inspecting ↓	AR05.20-P-6010HA
		Set the basic position of camshafts	AR05.20-P-6020HA
19	Reassemble engine

Camshaft code numbers

Number	Designation		Engine 604	Engine 605.910/ 911/912	Engines 606.910/ 912
BE05.20-P-1001-01A	Camshaft code numbers	Intake	11	11	08
		Exhaust	10	08	07

Camshaft code numbers

Number	Designation		Engines 605.960/ 962	Engines 606.961/ 962
BE05.20-P-1001-01A	Camshaft code numbers	Intake	14	11
		Exhaust	08	07

Camshaft

Number	Designation		Engine 604, 605, 606
BA05.20-P-1001-01A	Bolt for camshaft sprocket	Nm	18
BA05.20-P-1002-01A	Bolt for camshaft bearing cap	Nm	15

Fig 3: Identifying Retaining Pins (111 589 03 15 00)

Fig 4: Identifying Torx Bit Set (000 589 01 10 00)