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Home >> Mercedes Benz >> 2008 >> GL320 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 16 (Cooling System - 164 Chassis) >> Testing & Repair >> Remove/install coolant pump - AR20.10-P-1271 >> Remove/install coolant pump - AR20.10-P-1271GZA (ML350, ML550, GL450, GL550) >> Bolt diagram for coolant pump - AR20.10-P-1271-03VA

Bolt diagram for coolant pump - AR20.10-P-1271-03VA

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COOLANT PUMP, COOLANT THERMOSTAT

Number Designation Engine 272 Engine 273
BA20.10-P-1001-01U Self-tapping bolt connecting coolant pump to timing case cover M7 Stage 1 Nm 10 10
Stage 2 Nm 25 25
BA20.10-P-1002-01U Bolt, coolant pump to crankcase M8 Stage 1 Nm 5 5
Stage 2 Nm 20 20

Bolt assignments for coolant pump 

IMPORTANT Bolts A: Coolant pump on timing case cover.

Bolts B and C: Coolant pump on crankcase.

NOTES The tightening sequence given in the following table must be followed to ensure that there are no leaks in the coolant pump.

Fig 1: Identifying Bolt Assignments For Coolant Pump
G04734158Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
TIGHTENING SEQUENCE AND BOLT LENGTH

Tightening sequence Bolts
1 1A to 8A (M7_28), tighten in numerically ascending order
2 B (M8x75)
3 C (M8x110)