Removal procedure:
- disconnect the negative battery cable;
- drain the cooling system by removing the lower hose from the radiator;
- remove the timing belt and tension roller (see subsection "Cylinder head");
Fig. 3.81. Acoustic load
- remove the acoustic weight (Fig. 3.81);
Fig. 3.82. Water pump mounting bolts: 1–8 – bolt tightening sequence
- loosen and unscrew the water pump mounting bolts (Fig. 3.82), remembering their installation, since they are of different lengths;
- remove the water pump assembly from the cylinder block;
- clean the mating surfaces of the pump and cylinder block. It is strictly forbidden to use tools with a sharp edge for this. Use Decapjoint, which dissolves gasket residues.
Apply the specified product to the surface to be cleaned, wait for about 10 minutes, then remove the product with a wooden spatula. It is recommended to perform this operation wearing protective gloves. Do not allow the cleaning product to come into contact with paintwork.
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Installation procedure:
Fig. 3.83. Applying sealant to the mating surface of the water pump: c=0.6–1.0 mm
- apply a 0.6–1.0 mm wide bead of Loctite 518 sealant (Fig. 3.83) to the mating surface of the pump being installed;
- install the pump on the cylinder block, put the bolts in their places and tighten them preliminarily to a torque of 8 N·m in the sequence shown in Fig. 3.83, then finally tighten the M6 bolts to a torque of 11 N·m, and the M8 bolts to a torque of 22 N·m;
Note: Apply 1-2 drops of Loctite Frenetanch to bolts 1 and 4 (see fig. 3.83) water pump mounts.
- perform the remaining operations in the reverse order of removal;
- check for coolant leaks.