TOYOTA PREVIA 91-97 REPAIR MANUAL

3-10 ENGINE AND ENGINE OVERHAUL

Intake Manifold

REMOVAL & INSTALLATION

Exhaust Manifold

REMOVAL & INSTALLATION

I See Figure 16

1. Remove the air intake connector.


2. Disconnect and tag all wires, harnesses, coolant and vacu| m hoses
   from the intake manifold.


3. Disconnect the shift and accelerator cables.


4. Remove the fuel pipes.


5. Remove the distributor and EGR valve.


6. Remove the PCV hose.


7. Remove the water outlet, by-pass pipe and gasket from \\e mani-
   fold.


8. Disconnect the water hose form the water pump and remote the bolt
   holding the water by-pass pipe and timing chain case.


9. Remove the intake manifold stays.


10. Remove the 2 nuts and 4 bolts and extract the intake mani Did with
    gasket. Remove the cylinder block insulators.
    To install:


11. Position the cylinder block insulator on the cylinder head.


12. Position a new gasket on the cylinder head and install tie intake
    manifold with the 2 nuts and 4 bolts. Tighten the fasteners to lfc ft. Ibs.
    (21 Nm). Use a crisscross pattern starting from the center and work out-
    ward.


13. Install the intake manifold stays and secure to 27 ft. Ibs. ($7 Nm) to
    the block and 13 ft. Ibs. (18 Nm) to the intake manifold.


14. Install the bolt holding the water by-pass pipe and timing chain case

I See Figures 17 thru 22

1. Raise and safely support the vehicle.


2. Disconnect the front exhaust pipe from the exhaust manifold by
   removing the three nuts.


3. Remove the 5 nuts and remove the exhaust manifold and gasket.
   To install:


4. Install the exhaust manifold with a new gasket. Install and tighten the
   exhaust manifold nuts to 36 Nm (41 Nm). Use a crisscross pattern starting
   from the center and work outward.


5. Connect the front exhaust pipe to the manifold by installing new gas-
   kets and three nuts. Tighten the nuts to 46 ft. Ibs. (62 Nm).

and tighten to 13 ft. Ibs. (18 Nm). Connect the water hose to the
pump.

15. Install the delivery pipe, water outlet and EGR valve.


16. Install the distributor.


17. Connect all wires, connectors, coolant and vacuum hose:
    intake manifold.


18. Connect the shift and accelerator cables.


19. Install the air intake connector.


20. Fill and bleed the cooling system.


21. Start the engine and check for leaks.

ater

'om the

Fig. 17 Remove the header pipe attached to the exhaust mani-

fold retaining nuts

Fig. 18 Remove these nuts retaining the exhaust manifold to the

engine