Remove/install coolant pump - AR20.10-P-1271GZA (ML350, ML550, GL450, GL550): Notes
WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2012 Mercedes-Benz GL550, 2012 Mercedes-Benz GL450, 2011 Mercedes-Benz ML63, 2011 Mercedes-Benz ML550, and 2011 Mercedes-Benz ML350. However, it is still accessible from the selected car via links, so may be relevant.
ENGINE 272, 273 in MODEL 164, 251
Shown on engine 272
| Remove/install | |||
|---|---|---|---|
| Risk of injury to skin and eyes caused by scalding from contact with hot coolant spray. Risk of poisoning caused by swallowing coolant. | Do not open cooling system unless coolant temperature is below 90°C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers. Wear protective gloves, protective clothing and safety glasses. |
AS20.00-Z-0001-01A | |
| Notes on coolant | AH20.00-N-2080-01A | ||
| 1 | Remove electric fan | Model 164 with engine 273 | AR20.40-P-5000GZA |
| 2 | Drain coolant at radiator | AR20.00-P-1142GZC | |
| 3 | Remove poly-V belt and both guide pulleys | AR13.20-P-0001GZA | |
| 4 | Pry off electrical feed line retaining clamp (4) from coolant pump (5) | ||
| 5 | Dismount coolant hose from coolant pump (5) | ||
| 6 | Unscrew bolts for coolant pump (5) | AR20.10-P-1271-03VA | |
| *BA20.10-P-1001-01U | |||
| *BA20.10-P-1002-01U | |||
| 7 | Remove coolant pump (5) from timing case cover | ||
| Clean | |||
| 8 | Clean sealing surfaces on coolant pump (5) and timing case cover with a rag | ||
| 9 | Install in the reverse order | ||
| 10 | Inspecting cooling system for leaks | AR20.00-P-1010GZC | |
| Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running | Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts. |
AS00.00-Z-0005-01A | |
| 11 | Check for leaks with engine running |
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 | |||