Preparing and washing engine parts

The engine block must be washed (Fig. 1)

Preparing units and parts for assembling the ZMZ-53 engine

Preparing engine parts for assembly.

Preparation of units and parts for assembly of the ZMZ-53 engine

Pressing the front crankshaft oil seal into the front cover (Fig. 2).

Preparation of units and parts for assembly of the ZMZ-53 engine

Outside on There is an engine speed limiter on the front cover (Fig. 3).

We remove all the insides from the speed limiter and install a solid gasket and tighten it with the housing.

We screw the studs for fastening the fuel pump into the front cover

At the factory, the fuel pump is fastened with bolts. We install studs (Fig. 4), which will eliminate unnecessary problems in subsequent operation.

Preparation of units and parts for assembly of the ZMZ-53 engine

It happens that when a bolt is lost, a larger bolt is installed and this bolt rests against the camshaft gear, which leads to wear of the camshaft gear (Fig. 5)

Preparing units and parts for assembling the ZMZ-53 engine

Preparing the crankshaft. If the shaft was bored, then blow out the channels after boring with compressed air

Tighten the technological plugs of the oil channels (Fig. 6).

Preparation of units and parts for assembly of the ZMZ-53 engine

We countersink the holes on the shaft using a ball from a bearing (so that there are no sharp edges on the working part of the shaft bearing (Figure 7)).

Preparation of units and parts for assembly of the ZMZ-53 engine

On the rear part of the crankshaft, you can apply an oil drain thread, in the place where the shaft is pressed by the packing (Fig. 8). This increases the tightness of this joint.

Preparation of units and parts for assembly of the ZMZ-53 engine

We inspect and grind, if necessary, the camshaft (Figure 9)

Preparation of units and parts for assembly of the ZMZ-53 engine

If we remove the insides of the rev limiter, then we modify the bolt that secures the camshaft drive gear

Using a grinder, we cut off the crimping of the flag and remove the flag and spring. You will get bolt 2, as in the figure (figure 10)

This is done so that the bolt flag does not rest against the solid gasket under the rev limiter housing.

Camshaft gear mounting bolt: 1 - factory bolt; 2 - modified bolt

To avoid mistakes when assembling and installing gears, it is necessary to take into account that the mark on the crankshaft gear is located on the 12th tooth, counting from the tooth opposite the slot for the key counterclockwise (Figure 11).

Setting marks between gears: 1 - crankshaft gear tooth opposite the slot for the key; 2 - the twelfth tooth of the crankshaft gear, counting counterclockwise; 3 - risk between the teeth on the camshaft gear

Pressing in the babbitt bushings of the camshaft (of course, you can use steel-aluminum bushings) (Figure 12)

Preparing units and parts for assembling the ZMZ-53 engine

To press in the bushings, use the device (Figure 13)

Device for pressing in camshaft bushings

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