Installing the main bearing cap No.4 with a liner with a thrust half ring
The axial displacement of the crankshaft is selected on the fourth support, the bearing shells of which have two thrust flanges.
Assemble the main bearing caps with the liners and install them on the block bed. Tighten the cap mounting bolts to a torque of 6.5 kgf·m.
Install three piston rings into the corresponding grooves in the pistons, positioning their locks at 120° intervals (see photo).
When installing piston rings in the grooves, the ring locks must be positioned relative to each other at an angle of 120°. Arrow 1 shows the direction of installation of the pistons (towards the camshaft drive)
Orient the piston ring locks forward or backward as the vehicle moves. The lower compression and oil scraper rings have a mark "top" or "oben" ("up"), which should be facing upward when installing the ring in the rod.
Installing pistons using a piston ring compression sleeve
Install the pistons with the arrow stamped on the piston bottom pointing forward in the direction of vehicle travel (towards the camshaft drive).
Lubricate the pistons and piston rings with engine oil, compress the piston rings in the grooves of the corresponding mounting sleeve and insert the pistons with connecting rods into the cylinders.
Installing pistons with connecting rods into cylinders: 1 - the arrow should point towards the camshaft drive; 2 - the mark on the cylinder head gasket must be directed towards the plane of the head; 3 - dowel pin for correct installation of the cylinder head and head gasket
Install the bearings into the connecting rod and connecting rod caps in accordance with the marks made during disassembly if worn bearings are used.
Install the connecting rods and caps on the crankshaft journals, with the ridges on the caps facing towards the intermediate shaft.
Lightly tighten the connecting rod bolt nuts, then tighten them to the final torque specification.
Install the rear seal retainer with a new cardboard gasket. Press the seal into the retainer using mandrel 2003/1.
Pressing in the front crankshaft oil seal
Install the flywheel.
Installing the rear crankshaft oil seal
Install a new front oil seal retainer and crankshaft gasket. Install the retainer with the oil pump so that the pinion lugs engage the flats on the crankshaft.
Install the oil receiver with the tube.
Install the oil pan with a new gasket.
Install the coolant pump, thermostat and thermostat housing.
Install the cylinder head.
Removal and installation the gearbox primary shaft bearing. Top: Removing a bearing using an external puller. Bottom: Installing a bearing using a mandrel
Install the camshaft drive belt.
This article was copied from the website: AudiManual.ru