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Высокие технологии B Engine coolant temperature sender (arrowed) - VVT-i engine
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Renew the coolant pump O-ring 8.7a Engine coolant temperature sender

The bolts marked (A) are 30 mm long whilst the ones marked (B) are 35 mm long

Small arrows indicate the pump-to-block bolts. Larger arrows show weep holes

A-FE engine

E-FE engine

Refitting

ZZ-FE and 3ZZ-FE engines

13 Drain the engine coolant as described in Chapter 1.

14 Remove the auxiliary drivebelt as described in Chapter 1.

15 Undo the 6 bolts, and remove the coolant pump (see illustration). Discard the O-ring seal, a new one must be fitted.

16 Obtain a tube of sealant (Part No 08826-00100 or 3Bond 1282B available from Toyota dealers) and apply a 2.0 mm band of the sealant to the sealing groove on the housing, following the instructions supplied with the sealant.

17 Install the pump assembly to the block and secure with the bolt and two nuts.

18 Refit the remaining parts in the reverse order of removal. When reinstalling the dipstick tube, use a new O-ring where it pushes into the oil pump. Also use a new O-ring on the coolant inlet pipe.

19 With refitting complete, wait at least two hours for the sealant to set then refill the cooling system (see Chapter 1), run the engine and check for leaks and proper operation.

20 Using a new O-ring, fit the pump assembly to the block. Use a new gasket on the coolant

Cooling, heating and air conditioning systems 3•7

(arrowed) - 4E-FE Non-VVT-i engine

neck. Note: If the Dump has been renewed after many kilometers of usage, it's a good idea to also renew the hose connecting the coolant pump to the coolant neck.

21 Refit the remaining parts in the reverse order of removal. When refitting the dipstick tube, use a new O-ring where it pushes into the oil pump.

22 Refill the cooling system (see Chapter 1), run the engine and check for leaks and proper operation.