This tutorial is also available in French
➔
Water pump change on Austin Mini
Vehicle ➔ Mini 1000 am1991 automatic transmission
Difficulty ➔ Medium
Time ➔ 3 hours
Summary
Required Tools
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Packaging :
•
GFK1124 and GFK5180: The bolts and washers are sold individually.
• GHC406, GHC608 and GHC811: The clamps are sold individually.
• GWP134EVO: The water pump is sold with its gasket.
• GWP134FK: The kit includes 1 bypass hose, 1 water pump gasket, 2 clamps, 4 bolts + 4 water pump mounting washers.
• MOC210: The hose connector is sold individually.
• GHC406, GHC608 and GHC811: The clamps are sold individually.
• GWP134EVO: The water pump is sold with its gasket.
• GWP134FK: The kit includes 1 bypass hose, 1 water pump gasket, 2 clamps, 4 bolts + 4 water pump mounting washers.
• MOC210: The hose connector is sold individually.
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Remove the water pump
Op 01
Remove the grille (➔ see the tutorial ''Removing the grille'' Steps 01 to 04).
Once the grille is removed, the front radiator mounting bolts will be much easier to unscrew.
Op 02
Drain the cooling system (➔ see the tutorial ''Draining the cooling system'' Steps 01 to 05).
Op 03
Remove the radiator (➔ see the tutorial ''Replacing the radiator'' Steps 03 to 11).
Op 04
Remove the alternator (➔ see the tutorial ''Replacing the alternator'' Steps 02 to 07).
Op 05
Unscrew the 4 fan mounting bolts. Use the 7/16'' socket.
Op 06
Remove the fan, spacer, and pulley.
Op 07
Unscrew the 2 heater hose clamps on the lower hose. Use the 7 mm combination spanner.
Disconnect the 2 hoses. Pull firmly by hand.
This step is not essential when changing the water pump. But after dismantling all this, it would be a shame not to take the opportunity to change the lower hose.
It is best to unscrew the 2 clamps to facilitate disassembly. Indeed, the metal coupling fitting of the 2 hoses is sometimes welded to the hoses by rust. You have to pull really hard to disconnect them.
Op 08
Loosen the lower hose clamp on the water pump. Use the 7 mm socket spanner.
Remove hose. Pull by hand.
Op 09
Unscrew the 2 bypass hose clamps. Use the 7 mm socket spanner.
Op 10
Unscrew the 4 water pump mounting bolts. Use the 7/16'' socket.
Op 11
Remove the water pump and the water pump gasket (or what's left of it).
Op 12
Remove the bypass hose.
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Reinstall the water pump
Op 13
Thoroughly clean the surface on which the water pump seal will rest. Use a cutter and abrasive paper.
Op 14
Engage the bypass hose (GWP134FK kit) on the cylinder head.
Op 15
Fit and tighten the upper bypass hose clamp (GWP134FK kit). Use the 7 mm socket spanner.
Op 16
Fit the lower bypass hose clamp.
Tighten the clamp very slightly so that it stays in place on the hose.
Op 17
Engage the water pump (GWP134EVO) in the bypass hose.
Do not press the water pump against the engine block for now. This will allow the seal to be slid in later.
Op 18
Engage 2 mounting bolts (GWP134FK kit) on the water pump.
The 2 bolts will hold the seal in place during the final installation of the water pump.
The 4 water pump mounting bolts are of two different lengths:
• The longer ones (47 mm) are located at the rear of the water pump.
• The shorter ones (32 mm) are located at the front.
You can also look at the thickness of the housing at the mounting holes and deduce the position of each bolt.
• The longer ones (47 mm) are located at the rear of the water pump.
• The shorter ones (32 mm) are located at the front.
You can also look at the thickness of the housing at the mounting holes and deduce the position of each bolt.
Op 19
Fit the seal on the water pump (GWP134FK kit).
Op 20
Press the water pump against the engine block.
Op 21
Fit the other 2 water pump mounting bolts.
Op 22
Screw in the 4 water pump mounting bolts. Use the 7/16'' socket.
Tighten the 4 bolts to a torque of 23 mN. Use the torque wrench.
Tighten the 4 bolts diagonally and progressively.
Op 23
Fit the lower bypass clamp in its final position.
Tighten the clamp. Use the 7 mm socket spanner.
Op 24
Insert the hose connector (MOC210) into the lower hose (GRH240KEVLAR). Push firmly by hand.
Op 25
Fit and tighten the clamp (GHC406) on the lower hose. Use the 7 mm socket spanner.
Op 26
Fit the clamp (GHC811) on the lower hose without tightening it.
Op 27
Engage the lower hose on the water pump. Push firmly by hand.
Fit the clamp.
Tighten the clamp. Use the 7 mm socket spanner.
Op 28
Fit the clamp (GHC608) on the heater hose without tightening it.
Op 29
Engage the heater hose on the hose connector. Push firmly by hand.
Op 30
Fit and tighten the heater hose clamp. Use the 7 mm socket spanner.
Op 31
Correctly position the clip between the 2 heater hoses.
Op 32
Fit the pulley, spacer, and fan on the water pump.
Op 33
Fit and screw in the 4 fan mounting bolts (GFK5180) and their washers (GFK1124). Use the 7/16'' socket.
Op 34
Reinstall the alternator (➔ see the tutorial ''Replacing the alternator'' Steps 09 to 16).
Op 35
Reinstall the radiator (➔ see the tutorial ''Replacing the radiator'' Steps 18 to 26).
Op 36
Fill and bleed the cooling system (➔ see the tutorial ''Replacing the radiator'' Steps 27 to 29).
Op 37
Reinstall the grille (➔ see the tutorial ''Removing the grille'' Steps 05 to 06).
The End
