Inspect Valve Lifters And Lifter Bores

(a) Using a micrometer, measure the lifter diameter. Lifter diameter: 27.975 - 27.985 mm (1.1014 - 1.1018 in.)

(b) Using a caliper gauge, measure the lifter bore diameter of the cylinder head

Lifter bore diameter: 28.000 - 28.021 mm (1.1024 - 1.1032 in.)

(c) Subtract the lifter diameter measurement from the lifter bore diameter measurement.

Standard oil clearance: 0.015 - 0.046 mm

(0.0006 - 0.0018 in.) Maximum oil clearance: 0.07 mm (0.0028 in.) If the oil clearance is greater than maximum, replace the lifter. If necessary, replace the cylinder head.

16. INSPECT INTAKE, EXHAUST MANIFOLDS AND AIR CONTROL VALVE

Using a precision straight edge and feeler gauge, measure the surface contacting the cylinder head or air control valve for warpage Maximum warpage:

Intake manifold 0.05 mm (0.0020 in.) Exhaust manifold 0.30 mm (0.0118 in.) Air control valve 0.05 mm (0.0020 in.) If warpage is greater than maximum, replace the manifold.

INSPECTION OF TOYOTA - VARIABLE INDUCTION SYSTEM (T-VIS)

1. INSPECT AIR CONTROL VALVE

(a) With 300 mmHg (11.81 in.Hg, 40 0 kpal of vacuum applied to the actuator, check that the control valve moves smoothly to the fully closed position.

(b) With the vacuum released, check that the valve quickly fully opens.

If abnormal, replace the valve.

2. INSPECT VACUUM TANK

(a) Check that air flows from pipes A to B.

(b) Check that air does not flow from pipes B to A.

(c) Apply 500 mmHg (19 69 in.Hg, 66.7 kPa) of vacuum to pipe A and check that there is no change in vacuum after one minute. If there is change, replace the vacuum tank.

3. INSPECT VACUUM SWITCHING VALVE (VSV)

A. Inspect VSV for open circuit

Using an ohmmeter. check that there is continuity between the terminals. Resistance (Cold): 33 — 39 ft If there is no continuity, replace the VSV.

Inspect VSV for ground

Using an ohmmeter, check that there is no continuity between each terminal and the VSV body If there is continuity, replace the VSV.

C. Inspect VSV operation

(a) Check that air flows from pipe E to the filter.

(b) Apply battery voltage across the terminals.

(c) Check that air flows from pipes E to F.

If operation is not as specified, replace the VSV.

Simple Car Care Tips and Advice

Simple Car Care Tips and Advice

Put an End to All Your Car Troubles. Does Your Car Break Down Often? Are You Spending More On Fuel Than You Thought You Would? Is Maintaining Your Car Eating Into Your Budget? Make Your Car Last Longer with Some Simple Do It Yourself Tips.

Get My Free Ebook


Post a comment