2.17.7.6. Check began giving of TNVD

The beginning of giving can be checked on established and on the removed engine. For check the hour micrometer with the corresponding adapter is necessary for a vvinchivaniye in the pump.

Test and adjusting values of a piston stroke

Engine
1H, DAV
ABL
Test value: piston stroke, mm
0,93 – 1,07
0,85 – 0,95
Adjusting value piston stroke, mm
1,00 ± 0,02
0,90 ± 0,02

PERFORMANCE ORDER
1. To install 1 cylinder in VMT. For this purpose to turn the crankshaft so that VMT tag on a flywheel and flow of a case of coupling, and also a tag on a gear wheel of TNVD and the console coincided (see subsection 2.5.2).
2. Not to extend a rope of control of the accelerator of cold start.
3. The tension of a gear belt has to be normal.
5-cylinder engine
4. To remove the lower mudguard of a motor compartment.
5. To cast away a radiator together with a lock support forward.
6. To remove a casing of a gear belt of the TNVD drive.
7. To unscrew a carving stopper on TNVD cover.
8. To screw in instead of a stopper an adapter (V.A.G-2066) with a small hour micrometer (the field of measurement of 0-3,0 mm) until the arrow of a micrometer does not begin to move. To establish a micrometer for an adjusting ring on "0". Then to press on a micrometer further: indications on a scale about 2,5 mm (the 5-cylinder engine: 2,0 mm).
9. To turn gradually the crankshaft in a direction opposite to rotation of the engine (counterclockwise) until the arrow of a micrometer does not stop moving.
10. About 1 mm to establish a micrometer with the indication on "0".
11. To turn the crankshaft in the direction of rotation of the engine (clockwise) until VMT tag on a flywheel does not coincide with the corresponding tag. Now the micrometer has to show test value (see the tab. Test and adjusting values of a piston stroke).
Prevention

If test pressure lies in the allowed limits, then new adjustment is not required. If new adjustment is made, then it is necessary to establish adjusting value.
12. For adjustment to unscrew three bolts (2) on consoles and a bolt of fastening (1) of a back emphasis.
13. To establish by rotation of TNVD adjusting value of a piston stroke and to tighten a fastening bolt the moment of 25 N · m.
14. To remove a micrometer and to twist a carving stopper in a pump cover.
Prevention

To replace a sealing ring of a carving cover always. The inhaling moment – 15 N · m. At depressurization it is allowed to tighten the moment no more than 25 N · m.

Adjustment

Adjustment of the 4-cylinder engine

1. Bolts on the console

2. Bolts of fastening of a back emphasis

Adjustment of the 5-cylinder engine

Adjustment can be made as follows:
  – rotation of TNVD after a vyvinchivaniye of bolts of fastening of the console and an emphasis of the 4-cylinder engine (the first way);
  – rotation of a driving gear wheel of TNVD (second way).
Prevention

In order that it was possible to watch indications of a micrometer at rotation of a driving wheel of TNVD, to make rotation from below the car installed on a trestle or the elevator.

FIRST WAY

PERFORMANCE ORDER
1. Holding a driving gear wheel of TNVD a counteremphasis to weaken a bolt on 1 turn.
2. To check position of the crankshaft in VMT, if necessary to establish in VMT.
3. To turn a driving gear wheel of TNVD a counteremphasis, against the direction of rotation of the engine (in the direction of an arrow A) until the arrow of a micrometer stops moving.
4. To establish a micrometer on "0".
5. To turn a driving gear wheel of TNVD a counteremphasis in the direction of rotation of the engine (in the direction of an arrow B) until the micrometer shows adjusting value (the beginning of giving).
6. To hold a driving gear wheel a counteremphasis in this situation and to tighten a fastening bolt in the beginning the moment about 50 N · m.
7. To double-check the beginning of giving by rotation of the crankshaft back and forth. Then to double-check the beginning of giving.
Prevention

As a result of slipping of a gear belt test value deviates the adjusted value a little.

Example:

The adjusted value (the required value)
= 1, 00 mm of a piston stroke
Test value
= 0,93 mm of a piston stroke
Deviation (1,00 minus 0,93)
= 0,07 mm of a piston stroke
The deviation the Required value gives adjusting value with an advancing (for the second adjustment)
= 1,07 mm of a piston stroke

SECOND WAY

PERFORMANCE ORDER
1. Holding a driving gear wheel of TNVD a counteremphasis to weaken a bolt on 1 turn.
2. To check position of the crankshaft in VMT, if necessary to establish in VMT.
3. To turn a driving gear wheel of TNVD a counteremphasis against the direction of rotation of the engine (in the direction of an arrow A) until the arrow of a micrometer ceases to move.
4. To establish a micrometer on "0".
5. To turn a driving gear wheel of TNVD a counteremphasis in the direction of rotation of the engine (in the direction of an arrow B) until the micrometer shows adjusting value (in the given example – 1,07 mm).
6. Holding a driving gear wheel of TNVD in this situation a counteremphasis to tighten a fastening bolt previously the moment about 50 N · m.
7. To double-check the beginning of giving by rotation of the crankshaft back and forth.
Prevention

If necessary to repeat adjustment it is so much times, the required value will not be reached yet.
8. Holding a driving gear wheel of TNVD a counteremphasis to tighten its moment 100 N · m.
9. To remove a micrometer and to tighten a carving stopper on a pump cover.
Prevention

To replace a sealing ring of a carving stopper always. Inhaling moment: 25 N · m.
10. To establish a casing of a gear belt with a support of the lock and the lower mudguard of a motor compartment.