Tighten Connecting Rod Bolts - AR03.10-P-6111-02MR

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Engine 133, 260, 270, 274, 282

Topical note	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
	Specified engine oils (service) - Overview		BB00.40-P-0223-02A

MODIFICATION NOTES

23.02.2018	Screw/bolt, connecting rod bearing cap to connecting rod		BA03.10-P-1001-01J
19.04.2018	Basic date, inserted	Connecting rod bolt	BA03.10-P-1001-01E
19.04.2018	Factual information for vehicles with code 494 (USA version) added.	Replace connecting rod bolts (2) after every use. Otherwise, there is a danger of engine damage.
20.07.2018	New operation step added.	Operation step 1

CONNECTING ROD

Number	Designation			Engine 133	Engine 282
BA03.10-P-1001-01E	Connecting rod bolt	Stage 1	Nm	5	5
		Stage 2	Nm	30	25
		Stage 3	∠°	90	110

CONNECTING ROD

Number	Designation				Engine 270	Engine 274
BA03.10-P-1001-01J	Screw/bolt, connecting rod bearing cap to connecting rod	For initial tightening of new bolts	Stage 1	Nm	5	5
			Stage 2	Nm	15	15
			Stage 3	∠°	180	180
			Stage 4		Loosen bolts	Loosen bolts
			Stage 5	Nm	5	5
			Stage 6	Nm	15	15
			Stage 7	∠°	90	90
		In case of reusability	Stage 1	Nm	5	5
			Stage 2	Nm	15	15
			Stage 3	∠°	90	90

CONNECTING ROD

Number	Designation				Engine 260
BA03.10-P-1001-01J	Screw/bolt, connecting rod bearing cap to connecting rod	For initial tightening of new bolts	Stage 1	Nm	5
			Stage 2	Nm	15
			Stage 3	∠°	180
			Stage 4		Loosen bolts
			Stage 5	Nm	5
			Stage 6	Nm	15
			Stage 7	∠°	90
		In case of reusability	Stage 1	Nm	5
			Stage 2	Nm	15
			Stage 3	∠°	90

Fig 1: Identifying Tightening Angle With Magnet (450 589 00 13 00)

Courtesy of MERCEDES-BENZ USA

Shown on engine 274

Courtesy of MERCEDES-BENZ USA

Engine 133, 270, 274

with code 494 (US version)

Engine 282

Replace connecting rod bolts (2) after every use.

Otherwise, there is a danger of engine damage.

Do not use an impact wrench or compressed air tool to screw in the connecting rod bolts (2).

Otherwise the threaded holes may be damaged.

Engine 260
Measure length of connecting rod bolts (2).

If the dimension of the connecting rod bolts (2) exceeds 38.4 mm,

Install new connecting rod bolts (2).
Wet thread and bolt head contact surfaces of the connecting rod bolts (2) with engine oil.
Screw in connecting rod bolts (2) and tighten slightly by hand.
Tighten connecting rod bolts (2) with the tightening angle with magnet Engine 133
Engine 260

Engine 270

Engine 274

Engine 282

Observe tightening instructions.

Engine damage will occur otherwise.

If no angle tightener is available, continue turning connecting rod bolts (2) with a socket wrench and breaker bar in one move by the specified angle. To exclude an angular error, do not use a bending rod torque wrench when tightening.