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Check the cover of the cooling system, replacement of coolant hoses
Checking the cover Check the cooling system cap The design of the two-stage type screw cap
| - Having the engine to cool, carefully open the cap of the cooling system - the cover can have a bayonet (A) or the screw (B) design: the first applies to the petrol models, the second - on the diesel models. It makes sense to elaborate a little bit on the principle of operation of the screw cap used on models equipped with engines series 612. The lid opens in two stages: when the pressure in the system before the first reference value opens the lid mounted in the lower pressure reducing valve, providing access to the inner chamber of the cover. With further increase of the pressure reducing valve operates upper and depressurization through special ventilation hole in the neck of the expansion tank, - the excess gas phase enters the annular groove of the neck and then through the outlet nipple into the atmosphere. This design prevents overflow of the expansion tank.
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Cover bayonet | - Connect the nozzle (4) with lid (3) to the tester (2).
- Connect to the nozzle (4) The cover of the cooling system (5).
- By creating the desired pressure (see. Specifications), make sure of serviceability of operation reducing valve (6), - the valve must be tightly pressed against the rubber seal (arrow) and slightly lifted when releasing the spring.
- Replace defective cover.
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Screw cap type two-stage | - Connect the tester (2) nozzle (3a).
- Screw on the nozzle cooling system cap (5a).
- Inflate the desired pressure (see. Specifications), make sure of serviceability of operation of both relief valves.
- Replace defective cover.
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Replacement hoses
| - Identified in checking the status of components of the cooling system (see chap. Current leaving and service) damaged hoses must be replaced without fail.
- Drain the cooling system (see chap. Current care and maintenance).
- Loosen and move aside the mounting clamps. Carefully remove the hose from the suctions. If the hose is not amenable to removal, try rotating the it, taking care not to damage the pipe, breaking of which is fraught with considerable cost - remember that the radiator pipes are among the rather fragile components! If the hose can not be, it must be cut, - the cost of a new hose is not comparable to the cost of acquiring a removable radiator. Before you cut the pipe, prepare a suitable replacement for the standard size element.
- When installing a new hose, first put the clamps on him, and then install the hose to the nipples. If you originally installed clamps clamping type, replace them with screw / worm. To facilitate the installation of rigid hoses moisten the internal surfaces of the ends with soapy water or heating in hot water - avoid hose bundles do not immerse in boiling water.
- After installing the hose fittings, check the correctness of its installation in the engine compartment. Set the clamps on the ends of the hose, the head of them for flaring pipes, and tighten them.
- Fill the cooling system (see chap. Current care and maintenance).
- Start the engine and check for signs of coolant leaks from the unit serviced.
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