Daewoo Nexia

Since 1994 of release

Repair and car operation

2.41. Piston fingers and rings

THE GENERAL DATA

Dismantle of a piston finger


Backlash measurement in the lock of a piston ring

1. FLAT ЩУП 2. THE PISTON RING 3. THE BACKLASH IN THE LOCK OF THE RING WHICH IS ESTABLISHED IN THE CYLINDER IN THE BOTTOM POSITION

Measurement of a lateral backlash of a ring in a flute

MEASUREMENT OF THE LATERAL BACKLASH OF THE RING BY MEANS OF FLAT ЩУПА

The piston in gathering with a rod

1. МАСЛОСЪЕМНОЕ THE RING 2. TOP КОМПРЕССИОННОЕ THE RING 3. BOTTOM КОМПРЕССИОННОЕ THE RING 4. THE BROAD RING

Installation of a piston finger


Arrangement of locks of piston rings

1. THE LOCK OF THE BROAD RING 2. RING LOCK MASLOSEMNOGO 3. THE LOCK BOTTOM КОМПРЕССИОННОГО RINGS 4. THE LOCK TOP КОМПРЕССИОННОГО RINGS

Piston installation in the cylinder

1. THE LABEL ON THE PISTON BOTTOM SHOULD BE TURNED TO THE FORWARD PART OF THE ENGINE.

To disassemble

PERFORMANCE ORDER

1. To remove piston rings by means of a stripper. The dismantled rings are not subject to the further use. 2. To place the piston in gathering with a rod in the adaptation and выпрессовать a piston finger, fig. Dismantle of a piston finger see.

To clear

PERFORMANCE ORDER

The piston, finger and rod from:       – A dirt;       – A deposit;       – Film adjournment. Flutes in the piston are necessary for clearing to metal. Film adjournment from piston fingers delete after вымачивания them in a liquid for carburettor clearing. The prevention In order to avoid poisonings it is necessary to avoid a steam inhalation and contact of solvent to open sites of a body. Not to scrape a piston skirt.

To check up

PERFORMANCE ORDER

1. A rod. 1а. Presence of deformations of a bend or torsion.       – To establish on a rod the bottom cover and to tighten шатунные bolts номиналь ным the moment.       – To establish a rod in gathering on оправки and to check up it on presence of deformations of a bend and torsion. 1б. The deformed rods are not subject to repair, it is necessary to replace them. Before installation to check up the form of a new rod. 1в. Seats of loose leaves in the bottom head of a rod on presence of wear tracks and roughnesses. 1г. To check up шатунные bolts on presence of residual deformations of a stretching, having compared them on length to new bolts. 1д. To check up presence задиров in the plug of the top head of a rod. 2. A piston finger. 2а. Presence задиров. 2б. Presence of development because of wrong installation. 2в. Finger landing in the plug of a rod and piston lugs. 3. The piston. 3а. Presence задиров on a skirt. 3б. Presence of cracks. 3в. Damages of walls of flutes for piston rings. 3г. Deterioration.

To measure

PERFORMANCE ORDER

1. Piston rings. 1а. To pick up the complete set of new piston rings. 1б. To measure flat probeом a backlash in the ring lock, fig. backlash Measurement in the lock of a piston ring. To establish a ring in the cylinder on the height corresponding to the bottom dead point of the piston. For ring moving to use in quality оправки the piston. To measure a backlash in the ring lock, fig. backlash Measurement in the lock of a piston ring. If the backlash is less nominally го, cautiously to process a file butt surfaces of a ring. 1в. To measure a lateral backlash компрессионного rings. To insert компрессионное a ring into the top flute of the piston and to measure flat probeом a lateral backlash, fig. Measurement of a lateral backlash of a ring in a flute. If a ring too high to try to pick up a suitable ring. If necessary to provide normal landing of a ring in a flute it is necessary to finish height of a ring till the necessary size grinding. Ring operational development carry out an emery paper with a substrate from a glass plate. The prevention It is forbidden to chisel flutes in the piston. Large roughnesses in flutes should be removed cautiously the file end.

To collect

PERFORMANCE ORDER

1. A rod with the piston. The prevention At assemblage it is necessary сориентировать the piston concerning a rod so that the label on the piston (fig. the Piston in gathering with a rod) settled down from that party of a rod which is turned to a forward part of the engine. 1а. To place the piston and a rod in a screw press, fig. Installation of a piston finger. 1б. To adjust position of the screw of a press. 1в. To grease a piston finger with pure engine oil. 1г. Запрессовать a finger in the piston.

To check up

PERFORMANCE ORDER

Free moving of the piston concerning a finger.

To establish or attach

PERFORMANCE ORDER

1. The complete set маслосъемных rings:       – A broad ring;       – Bottom маслосъемное a ring;       – Top маслосъемное a ring. 2. Top and bottom компрессионные rings. Marks of rings should settle down from above. The prevention For installation of rings on the piston to use a stripper or other adaptations. It is not necessary to expand too strongly rings as it can lead to ring breakage. For maintenance of reliable consolidation of gases in the cylinder it is necessary to develop rings so that locks of rings settled down definitely, fig. the Arrangement of locks of piston rings. 3. To grease a mirror of the cylinder and piston rings with pure engine oil. 4. To turn a cranked shaft in position of the bottom dead point. 5. To establish protective rubber tubes on шатунные bolts. 6. To establish the device for compression of piston rings, fig. piston Installation in the cylinder. 7. To develop the piston in gathering with a rod so that a label on the piston bottom has been turned forward. To insert the piston into the cylinder. The prevention It is necessary to show care at piston lowering in the cylinder not to damage the bottom head of a rod a neck of a cranked shaft. 8. To remove protective rubber tubes. 9. To establish loose leaves шатунного the bearing. 10. To fix a cover of the bottom head of a rod. The prevention To plant into place a bearing cover easy blows of a hammer. Not to draw a cover bolts. To tighten шатунные bolts, then to release on one turn and to tighten the demanded moment.

To check up

PERFORMANCE ORDER

To press a rod and to shift it serially forward and back, to check up absence of jamming of a rod.