Toyota Land Cruiser 100/Amazon, Lexus LX 470

since 1997 of release

Repair and car operation

Check and adjustment of gaps of valves

Adjustment of klapanny gaps is made on the cold engine!

Petrol engine

For performance of this procedure special tools which can be acquired in Toyota company service centers, firm shops of automobile accessories and in the wholesale markets be required.

If gaps in the valve a drive are great, valves will enough not open. The drive will be noisy and the engine will badly pull, as there will be an incomplete filling of cylinders by a working mix. Final valves will open insufficiently for ventilation of the cylinders, the remained pressure of gases will interfere with receipt of a new charge of a mix in the cylinder. If gaps are too small, inlet and final valves will not sit down in saddles densely when closing. It will worsen a heat-conducting path from warm valves to a head. Thanks to it the engine also will lose draft (there will be a leakage of gases), valves will overheat and burn through.

Adjustment of gaps in the valve a drive is made by selection of adjusting washers of a certain thickness which are established in pushers of valves. When manufacturing the drive of valves has some disorder within admissions therefore at adjustment of gaps it is required to establish the washers, a little different in the thickness from each other. The Toyota company lets out repair washers of different thickness with a step of 0.02 mm. For carrying out the correct adjustment of gaps in the valve a drive necessary adjusting washers can be got at the dealer of the Toyota company.

For carrying out this procedure the specialized Toyota tools are required. For a pusher otzhimaniye to receive a sufficient gap for washer replacement (the klapanny spring is thus compressed) the tool similar to big flares is applied. The rychazhok, an established vraspor is applied to pusher fixing in this situation between a pusher and a camshaft. For removal of a washer apply the magnetic tool, to exact measurement of its thickness – a micrometer. It is not recommended to carry out gap adjustment if there are no such tools.

Adjustment of valves, certainly, should be it is carried out as it is possible more precisely, however, if there is no other possibility, it is better to leave a gap in a drive slightly increased, than "pressed" as in the latter case valves can burn through. It is better to have a little noisy engine, than faulty.

Check

PERFORMANCE ORDER

1. Disconnect a negative wire from the battery.

If the stereosystem established on the car is equipped with a security code before disconnecting the battery make sure that have the correct combination for audiosystem input in action!

2. Empty cooling system.
3. Disconnect coils from spark plugs and remove the other components disturbing to removal of a cover of a head of cylinders.
4. Blow candle niches and turn out spark plugs (see. Section Check of a condition and replacement of spark plugs (petrol engines)).

When using the compressed air do not forget to put on goggles!

5. Uncover (also) heads (ok) cylinders (see. Head Engine).
6. Bring the piston of the first cylinder into the provision VMT of the end of a step of compression (see. Head Engine).
7. With the help щупов lezviyny type make measurement of gaps of the valves specified on an accompanying illustration.

8. Turn a cranked shaft on one complete revolution in the normal direction and make measurement of gaps of the remained valves (address to an accompanying illustration).

Adjustment

PERFORMANCE ORDER

1. Having finished measurements, compare them to requirements of Specifications.
2. On the engine 2UZ-FE remove a camshaft (see the corresponding part of Head the Engine).
3. By means of a micrometer measure thickness of the taken adjusting washer. For determination of thickness of a new washer make the following calculations:
N= T + (AND – V)
Where:
T = Thickness of an old adjusting washer
And = Size of the measured gap
V= The demanded size of a klapanny gap
N= The demanded thickness of a new adjusting washer (see. Specifications).
4. Pick up a new adjusting washer of the thickness allowing as much as possible precisely to approach a klapanny gap to demanded value. Adjusting washers of 41 standard amount in a range from 2.000 to 2.800 mm (No. No. from 00 to 80) with a step of 0.020 mm are issued.

In certain cases removed from a pusher of one valve the old washer can be suitable for installation on a pusher of another, needing adjustment, the valve, do not hurry to get replaceable washers.

5. Establish on a pusher the picked-up adjusting washer. By means of measuring щупа the corresponding thickness make sure of correctness of the made adjustment.
6. Operating in a similar manner, make adjustment of all valves with the broken gap.
7. Establish to the place of a spark plug, a cover (and) heads (ok) cylinders, protective covers, an arm of a cable of an accelerator and other, acting in film for the purpose of ensuring access, components.

Diesel engine

Check

PERFORMANCE ORDER

1. Remove air lines and a cover of a head of cylinders.

2. Transfer the piston of the first cylinder to VMT. For this purpose, rotating a cranked shaft clockwise, combine adjusting labels (address to an accompanying illustration). Thus cams of a drive of valves of the first cylinder should be turned up, otherwise turn a cranked shaft on one turn. Make sure that yokes of valves of the first cylinder are free, and yokes of valves of the cylinder No. 6 are tightened.

3. Measure a gap between the adjusting screw of a yoke of the valves specified on an accompanying illustration and the lever of a drive of the valve.

4. Turn a cranked shaft on one turn and measure a gap on other valves.
5. Compare results of measurements to requirements of Specifications and if necessary adjust klapanny gaps.

Adjustment

PERFORMANCE ORDER

1. Weaken a lock-nut on the lever of a drive of the valve (1) and turn out the adjusting screw (2) so that the last and a core of the valve appeared completely disconnected (address to an accompanying illustration).

Thus hold the lever of a drive of valves an adjustable spanner.

2. Weaken a lock-nut the adjusting screw on a yoke.
3. Insert щуп lezviyny type between the adjusting screw on a yoke and the lever of a drive of valves. For Inlet valves use щуп in the thickness of 0.20 mm, and for final – thickness of 0.50 mm.

4. Turn the adjusting screw in a yoke until when moving щупа small resistance then fix the adjusting screw a lock-nut (address to an accompanying illustration) will not be felt.

5. At inserted щупе check that resistance to its moving does not change when weakening the adjusting screw on the lever of a drive of valves. Otherwise return to paragraph 2.
6. Tighten the adjusting screw on the lever of a drive of valves and fix it a lock-nut when resistance щупа will amplify.

Thus hold the lever of a drive of valves an adjustable spanner.

7. Weaken a lock-nut on a yoke.
8. Move the adjusting screw while щуп will not start to move with very small resistance then fix the adjusting screw a lock-nut.
9. Establish a cover of a head of cylinders and earlier dismantled details.