Ford Sierra

1982-1993 of release

Repair and car operation

3.1.4.2.1.3. Krivoshipno-shatunny mechanism

GENERAL INFORMATION

Cranked shaft

The cranked shaft made of cast iron is dynamically balanced and leans on five radical bearings.

Diameters of radical necks:
– the nominal	53,980-54,000 mm
– the repair-0,25	53,730-53,750 mm
– the repair-0,50	53,480-53,500 mm
– the repair-0,75	53,230-53,250 mm
Width of the basic bearing:
– the nominal:	28,825-28,875 mm
– the repair	28,675-28,725 mm
Radial gap in radical bearings	0,028-0,067 mm
Axial gap of a cranked shaft	0,1-0,2 mm
Diameter of shatunny necks:
– the nominal	43,890-43,910 mm
– the repair-0,25	43,640-43,660 mm
– the repair-0,50	43,390-43,410 mm
– the repair-0,75	43,140-43,160 mm
– the repair-1,00	42,89-42,910 mm

Radical loose leaves

Thin-walled loose leaves are used.

Internal diameter of loose leaves after installation in the block of cylinders:
– the nominal	58,016-58,059 mm
– the repair-0,25	57,776-57,809 mm
– the repair-0,50	57,516-57,559 mm
– the repair-0,75	57,266-57,309 mm

Rods

Rods are shaped from steel and have dvutavrovy section.

Diameter of an opening of the bottom head	46,890-46,900 mm
Diameter of an opening of a head	20,622-20,634 mm
Radial gap in shatunny bearings	0,020-0,065 mm

Shatunnye loose leaves

Thin-walled loose leaves are used.

Internal diameter of loose leaves after installation in the block of cylinders:
– the nominal	43,919-43,960 mm
– the repair-0,25	43,669-43,710 mm
– the repair-0,50	43,419-43,460 mm
– the repair-0,75	43,169-43,210 mm
– the repair-1,00	42,919-42,960 mm

Pistons

Pistons are cast under pressure from an easy alloy, have a flat bottom with deepenings for plates of valves.

Piston gap in the cylinder:
– the nominal	0,02-0,04 mm
– the repair	0,01-0,045 mm
Nominal diameters of pistons:
Cтандартные:
– group 1	79,910-79,920 mm
– group 2	79,920-79,930 mm
– group 3	79,930-79,940 mm
– group 4	79,940-79,950 mm
– group 5	79,950-79,960 mm
– group 6	79,960-79,970 mm
The increased:
– group A	79,970-79,980 mm
– group B	79,980-79,990 mm
– group C	79,990-80,000 mm

Repair diameters of cylinders: are increased by 0,290 or 0,500 mm.

Piston rings

Each piston has rings: two sealing and one maslosjemny.

Sealing rings should be directed by an inscription of "Torahs" towards a head of the block of cylinders.

Gap of the lock of rings (placed in the cylinder):

– the sealing: 0,30-0,50 mm;
– maslosjemny: 0,40-1,40 mm.

Position of locks of rings on the piston: cuts of sealing rings should be placed evenly on piston perimeter, and components of a maslosjemny ring should have the cuts located through each 120 °.

Flywheel

The flywheel is fixed on a flange of a cranked shaft by means of 6 bolts.

Gear wreath напрессовывается at temperature 260 °–280 ° Page.