engines
The engine of a car is the engine that drives a car.
We disassemble the block head for subsequent repair or replacement.
When disassembling, you need to lay out the spare parts of the head in order, taking into account their further use.
Usually, we start checking and replacing hydraulic pushers when increased engine noise occurs.
This is usually a ringing sound at the top of the engine.
Disassembly of the cylinder block was discussed in the article - "Disassembly of the cylinder block"
After disassembling the cylinder block, it is necessary to determine the possibility of further use of the cylinder block, crankshaft and piston group.
Below are the catalog numbers of the original spare parts that are most in demand during maintenance and repair of the engine.
The main dimensions of the crankshaft are given in Figure 1.
Crankshaft - cast, cast iron, five-bearing.
It is possible to regrind the crankshaft journals during repairs with a diameter reduction of 0.25; 0.5; 0.75; and 1 mm.
The fuel supply system filters the fuel and distributes it evenly among the engine cylinders in metered portions at strictly defined moments
The main dimensions of the connecting rod and piston group are shown in Figure 1.
The piston is cast aluminum. The mass of the pistons is strictly maintained in the manufacture.
We discussed the removal of the cylinder head in article. In this article, we will look at the disassembly and assembly of the cylinder head.
After removing the cylinder head, we disassemble it and defect.
Figure 1 shows a diagram of the Cummins ISF3.8 engine control system of the Valdai car
The system of gas turbine supercharging and charge air cooling, by using part of the energy of the exhaust gases, provides the supply of pre-compressed and cooled air to the engine cylinders
Diesel model D-245.7EZ is installed on PAZ-32053-07 buses.
Diesel model D-245.9EZ is installed on buses PAZ-4234 and PAZ-32053-07
The general view and cross section of the engines are shown in the figures.
The engines are inline four-cylinder, equipped with carburetors and a contactless ignition system
If a malfunction occurs during the operation of the bus (lighting up, flashing the diagnostic lamp of the "COMMON RAIL" system), it is necessary to diagnose the "COMMON RAIL" system using the diagnostic lamp and the diagnostic key and eliminate the identified malfunctions
The timing chain tensioner is located on the right side of the engine above the coolant pump.
Oil is supplied to the hydraulic tensioner through a seamless steel tube with a diameter of 6 mm with tips.
We examined the engine disassembly in the article - Engine disassembly.
In this article, we will consider the defect detection of parts and the preparation of the main parts for assembly.
The piston pin is installed with tension in the upper head of the connecting rod and rotates freely in the piston bosses.
The engines are equipped with SMP pistons.
