Suzuki Grand Vitara SQ416/SQ420/420WD

Establish the directing hose (1) over a carving of conrod bolts. It is necessary to avoid damage of a pin of the bearing and a carving of conrod bolts at removal of a rod.

Weaken lock rings of a piston finger (1).

Remove a piston finger.

The difference between measurements of axial section and the direction of draft leaves with a deviation from "roundness".
Limit of internal diameter of the cylinder: 75.15 mm (2.9586 inches) Bias of internal diameter of the cylinder
limit: 0.10 mm (0.0039 inches)
Internal diameter of the cylinder with a deviation from roundness
limit: 0.10 mm (0.0039 inches)

If at least one of four cylinders has to be chiseled, chisel all four cylinders to the same bigger size. It is necessary for the purpose of preservation of uniformity and balance.

Diameter of the piston has to be measured at distance of 23 mm (0.91 inches) (1) from the end of a skirt of the piston in the direction perpendicular to a piston finger.

Norm

74.970 – 74.990 mm (2.9516 – 2.9523 inches)

Repair size: 0.50 mm (0.0196 inches)

75.470 – 75.480 mm (2.9713 – 2.9716 inches)

Measure the internal diameter of the cylinder and diameter of the piston to find a difference which will be a piston gap. The gap of the piston has to conform to the technical requirements specified below. If it does not conform to technical requirements, chisel the cylinder and use the piston of the bigger size. Piston gap: 0.02 – 0.04 mm (0.0008 – 0.0015 inches).

The internal diameters of the cylinder used here are measured in the direction of draft in two provisions.

Before checking, it is necessary to clear, dry and exempt from a piston groove deposit. Put a new piston ring (1) in a piston groove, and measure a gap between a ring and a crossing point between two flutes of piston rings by means of a kalibromer (2).

Check a gap of a piston finger on the top head of a rod. Replace a rod if its top head is strongly worn-out or damaged or if the measured gap goes beyond an admissible limit.

norm: 0.003 – 0.016 mm (0.0001 – 0.0006 inches) limit: 0.05 mm (0.0020 inches)

Internal diameter of a small head of a rod: 19.003 – 19.011 mm (0.7482 – 0.7484 inches)

 Diameter of a piston finger: 18.995 – 19.000 mm (0.7478 – 0.7480 inches)

Check a side gap of a big head of a rod, having inserted and having attached a rod to his conrod neck regularly. If it turns out that the measured gap goes beyond norm, replace a rod.
Side gap of a big lower head of a rod
norm: 0.10 – 0.20 mm (0. — 39 – 0.0079 inch) limit: 0.35 mm (0.0137 inches)

Check a conrod neck for existence of uneven wear or damage. Measure a conrod neck on a deviation or a bias with the help a micromeasure. If the conrod neck is injured or if the deviation or a bias is more than admissible limit, replace the crankshaft or you peretochit a conrod neck, having addressed point f).

Norm

43.982 – 44.000 mm (1.7316 – 1.7322 inches)

0.25 the mm (0.00984 inches) is lower than nominal

43.732 – 43.750 mm (1.7218 – 1.7224 inches)

Check bearing inserts for existence of an oplavleniye, ulcerations, a prozhig or peelings and examine a configuration of contacts. The damaged inserts of the bearing have to be replaced. There are two types of bearings of a rod available: the bearing of the standard size and the bearing is less than standard size of 0.25 mm. In order that they could be distinguished, on the bearing of the smaller size of 0.25 mm there is a number (US 025) printed on its back party, and the bearing of the standard size without number.

a. Before checking a bearing gap, clean the bearing and a neck of a rod.
b. Install the bearing in a rod and a cover of the bearing.
c. Put a part of plaster solution (1) on the full width of a neck of a rod in the place of contact of the bearing (parallel to the crankshaft), bypassing lubricant openings.

d. Establish a cover of the bearing of a rod (1) on a rod. At installation of a cover be convinced that the arrow (2) on a cover indicates the party of a pulley of the crankshaft (3). Having oiled engine rod bolts, put the cover clamps with specified rotating the moment. Do not turn the crankshaft with plaster solution inside. The rotating inhaling moment: a nut of a cover of the bearing of a rod (a) — 35 N • m (3.5 kg-m, 25.5 pound on foot).

e. Uncover also by means of a ruler (2) on a cover of plaster solution (1), measure width of plaster solution in the widest place (gap). If the gap goes beyond norms, use the new bearing of the standard size and try on a gap.

Oil gap of the bearing of a rod
norm: 0.020 – 0.050 mm (0.0008 – 0.0019 inches) limit: 0.080 mm (0.0031 inches)

Complete diameter of a conrod neck

=

The measured internal diameter of a big head (including the bearing there is less nominal size)

—

0.035 mm (0.0014 inches)

The lock ring has to be established by a detachable part up or down.

Install piston rings in the piston:
The first ring (1) differs from the second ring (2) in a form and marking. Distinguish the first ring from the second, having looked at the drawing, and install these piston rings in the piston, directing the marked party of each ring on the top of the piston. Establishing an oil scraper ring (3), at first put a strut, and then two erasing edges of an oil scraper ring.

You do not apply oil between a rod and the bearing or between a cover of the bearing and the bearing.

Establish the directing sleeves over rod bolts. These directing sleeves protect a conrod head and a carving of bolts of a rod from damage at installation of a rod and knot of the piston.

Install the piston and knot of a rod in a cylinder trunk. Use the special tool (the compressor of piston rings) to squeeze rings. Direct a rod into place in the crankshaft. By means of the handle of the hammer besiege easy blows a piston head to install the piston in a trunk. Firmly you hold the compressor of rings against the block of cylinders until all piston rings do not enter a cylinder trunk. Special tool: (A) 09916-77310.

Establish a cover of the bearing (1): establish an arrow (2) on a cover towards a pulley of the crankshaft (3). Fasten cover nuts according to technical recommendations. The rotating inhaling moment: a nut of a cover of the bearing of a rod (a) — 35 N • m (3.5 kg-m, 25.5 pounds on foot).