Opel Corsa B, Combo, Tigra

Since 1993-2000 of release

Repair and car operation

Check and adjustment клапанных backlashes on the diesel engine

For indemnification of thermal expansions in клапанном the mechanism there should be a certain backlash.

At too small backlash phases газораспределения change, compression process worsens, capacity of the engine decreases, engine work becomes non-uniform. In extreme cases valves can be deformed or burn to saddles.

At unduly big backlash there are mechanical noise, phases газораспределения, owing to too short time of opening of valves change and, hence, bad filling of cylinders, capacity of the engine decreases, the engine works non-uniformly.

Adjustment клапанных backlashes can benefit only in that case when valves are ground well in, I am absent inadmissible люфты in their directing, and the ends of cores of valves are not hammered.

Klapannye backlashes should be regulated within the limits of maintenance service carrying out, after repair or in the presence of noise in work клапанного the mechanism.

Klapannye backlashes should be checked and regulated on the cooled down engine i.e. when its temperature is equal to an ambient temperature.

Check

PERFORMANCE ORDER

Uncover heads of cylinders. Establish the piston of the first cylinder in position ВМТ (Engines see the Head). At a finding of the piston of the first cylinder in ВМТ position of cams of a camshaft looks like, shown (cams do not concern valves of the first cylinder). Position of cams of a camshaft at a finding of the piston of the first cylinder in ВМТ Before check клапанных backlashes check up reliability of a tightening of nuts of fastening of covers of basic bearings of a camshaft. If necessary tighten nuts with effort of 25 Nanometers. Check of effort of a tightening of nuts of fastening of covers of basic bearings Insert щуп between a cam of a camshaft and an adjusting washer and check up a backlash in conformity with requirements of Specifications in the Head of Adjustment and car routine maintenance. Щуп it should be involved as though, otherwise клапанный the backlash demands adjustment. Mark position of a pulley of a cranked shaft opposite to label ВМТ. Turn a cranked shaft on a half-turn in a direction of rotation of the engine. In position ВМТ now there is a following piston. According to sequence of ignition 1-3-4-2, it is the third cylinder. Numbers of cylinders go one after another from the first on the fourth. The cylinder 1 is at a pulley of a gear belt. Check up backlashes in the image described above. Then turn a cranked shaft for a half-turn and check up клапанный a backlash of cylinders 4 and 2. In need of adjustment клапанного a backlash change a thickness щупа until true value of a backlash will be received. Write down the received value. Establish a cover of a head of cylinders with a new lining and tighten bolts of its fastening with effort of 8 Nanometers.

Adjustment

PERFORMANCE ORDER

Turn a cranked shaft so that the top of a cam of a camshaft over the adjustable valve has been turned upwards. Camshaft installation in position for adjustment клапанного a backlash Turn a valve pusher so that the pusher groove has been turned forward. The klapannyj backlash is regulated by selection of adjusting washers. For this purpose press a pusher special adaptation OPEL-KM-650. Pusher pressing by the special tool Take out an adjusting washer from a pusher and by means of a magnet. Define a thickness of the established adjusting washer by means of a micrometer and write down result of measurement. The thickness of a washer should be engraved on its bottom party. Calculate a thickness of a new adjusting washer under formula N = T + (A - S), where N - a thickness of a new adjusting washer, T - a thickness of the removed adjusting washer, And - the measured value клапанного a backlash, and S - demanded by Specifications (in the Head of Adjustment and car routine maintenance) value клапанного a backlash. Adjusting washers can be applied, as a rule, repeatedly, there will be no yet clearly visible wear tracks. If marks of a thickness of a washer are not visible any more washer to apply further do not follow. Moisten new adjusting in impellent oil and establish a washer marks downwards. In the way described above adjust all клапанные backlashes. In summary check up once again клапанные backlashes.