Ford Sierra

4.1.1.3. The Krivoshipno-shatunnyj mechanism

THE GENERAL DATA

Cranked shaft

The steel cranked shaft leans against five bearings.

Axial люфт	0,08 – 0,28 mm
Diameters of radical necks:
– The nominal size	56,970 – 56,990 mm
– The repair size-0,25	56,720 – 56,740 mm
– The repair size-0,50	56,470 – 56,490 mm
– The repair size-0,75	56,220 – 56,240 mm
– The repair size-1,00	55,970 – 55,990 mm
Backlash in radical bearings	0,010 – 0.064 mm
The prevention Measurement to spend by means of measuring cores Plastigage.
Diameters шатунных necks:
– The nominal size	51,980 – 52,000 mm
– The repair size-0,25	51,730 – 51,750 mm
– The repair size-0,50	51,480 – 51,500 mm
– The repair size-0,75	51,230 – 51,250 mm
Thickness of persistent half rings:
– The nominal size	2,30 – 2,35 mm
– The repair size	2,50 – 2,55 mm

Flywheel

The flywheel is fixed on a flange of a cranked shaft by six bolts.

Intermediate shaft

The intermediate shaft is located in a forward part of the block of cylinders, on the left side. Obes-pechivaet a drive of the distributor of ignition, and also oil and fuel pumps.

Axial backlash – 0,050–0,204 mm.

Rods

Rods are shaped from a steel and in section them has двутавровый a profile. A piston finger запрессован in a rod head.

Diameter of an aperture of a head of a rod	23,964 – 23,976 mm
Finger tightness in a rod head:	0,018 – 0,039 mm
Temperature of heating of a head of a rod in the course of finger installation	250 – 300 ° WITH
Diameter of an aperture of the basis of a rod	55,000 – 55,020 mm
Internal diameters of apertures шатунных loose leaves:
– The nominal size	52,006 – 52,044 mm
– The repair size-0,25	51,756 – 51,794 mm
– The repair size-0,50	51,706 – 51,744 mm
– The repair size-0,75	51,256 – 56,294 mm
– The repair size-1,00	51,006 – 51,044 mm
Backlash in radical bearings	0,006 – 0.064 mm
The prevention Measurement to spend by means of measuring cores Plastigage.
Admissible неперпендикулярность axes of apertures concerning a rod axis:
– A head aperture	0,10 mm
– A basis aperture	0.15 mm

Pistons

Pistons are made of an easy alloy, without flutes on a spending part, with filled in инварным a ring limiting thermal errors of the sizes. In the top part there are three flutes for piston rings. The axis of an aperture of a piston finger is displaced concerning a piston axis. Pistons are delivered in complete sets together with fingers and rods.

Installation method: the arrow at the bottom of the piston should be directed towards a forward part of the engine (towards a system drive timing).

Piston fingers

The fingers made of an alloy of a steel and subjected to thermal processing, запрессованы in heads of rods (hot installation at temperature of a head 250 °–300 °) also turn in piston naves.

Length:
– двигатель1,3 дм3	60,0 – 60,8 mm
– двигатель1,6 дм3	68,0 – 68,8 mm
– двигатель2,0 дм3	72,0 – 72,8 mm
Diameter:
– A designation red colour	23,994 – 23,997
– A designation dark blue colour	23,997 – 24,000
– A designation red colour	22,000 – 24,003
Backlash in piston naves	0,008 – 0,014 mm
Tightness in a rod head	0,018 – 0,039 mm

The sizes of pistons (mm)

The engine	1,3 дм3	1,6 дм3	2,0 дм3
Diameters the nominal standard:
– Group 1	78,965 – 78,975	87,615 – 87,625	90,765 – 90,775
– Group 2	78,975 – 78,985	87,625 – 87635	90,775 – 90,785
– Group 3	78,985 – 78,995	87,635 – 87,645	90,785 – 90,795
– Group 4	78,995 – 79,005	87,645 – 87,655	90,795 – 90,805
Diameters of the repair sizes:
– The standard	78,900 – 79,015	87,640 – 87,665	90,780 – 90,805
– With the admission 0,5	79,490 – 79,515	88,140 – 88,165	91,280 – 91,305
– With the admission 1,0	79,990 – 80,015	88,640 – 88,665	91,780 – 91,805
Backlash of new pistons in цилинрах	0,015 – 0,050	0,015 – 0,050	0,025 – 0,060

Piston rings

Each piston has three rings: two sealing and one маслосъемное.

Backlash of the lock of sealing rings (located in the cylinder):
– двигатель1,3 дм3 and двигатель1,6 дм3	0,30 – 0,50 mm
– двигатель2,0 дм3	0,038 – 0,048 mm
Lock backlash маслосъемного rings	0,40 – 1,40 mm

Arrangement of locks of rings:

 – Sealing – on 150 ° (in opposite sides) concerning the lock of maslosem th ring;
 – маслосъемного – the lock of a holding apart spring is established according to naprav-leniem arrows at the bottom of the piston; locks of the top and bottom plates are established on 25 mm to the right and to the left from an arrow direction.