ra20006010015x

0015 - Cleaning, flushing cooling and heating system Engines 601, 602 (except 602.98), 603

Typ ra · téma 20.00 · verze 9918 · 1999-04-30

Platí pro:

Není k dispozici v jazyce „cs“; zobrazeno v jazyce Angličtina.

Zařazení

Funkční skupina 1 Motor › 20 Chlazení motoru › 20.00 Všeobecné — Řada 601 · Řada 602 (modely 91*, 96*)

Platí také pro motory/převodovky: 603 91*, 603 96*, 603 970, 603 971

20-015 Cleaning, flushing cooling and heating system

Preceding work:

Engine compartment cladding bottom removed (01-006).

Coolant drained (20-010).

Operation no. of operation texts and operation values or standard texts and flat rates 20-1030

0015 - Cleaning, flushing cooling and heating system Engines 601, 602 (except 602.98), 603

Coolant thermostat

remove and install forcibly-opened thermostat part no. 000 589 74 63 00 (step 1).

Flushing connection pipe (01)

install and connect tap water hose (03) (steps 2 and 3).

Cooling system

flush (step 4 - 20, 22).

Cooling system expansion tank

remove and install, flush out (step 21).

Cooling system

check for leaks (20-017).

Service products

Anticorrosion/antifreeze agent 000 989 08 25

Citric acid powder (0.5 kg) 000 989 10 25

Commercially available tools and testers

Designation

e. g. make, order no.

Hexagon bit for wrench on flexible shaft
with worm drive

Hazet 6 mm 426-6
42853 Remscheid 7 mm 426-7

0015 - Cleaning, flushing cooling and heating system Engines 601, 602 (except 602.98), 603
0015 - Cleaning, flushing cooling and heating system Engines 601, 602 (except 602.98), 603
0015 - Cleaning, flushing cooling and heating system Engines 601, 602 (except 602.98), 603

Special tools

Notes

High coolant temperatures and low heating capacity may also be caused by deposits of corrosion products in the radiator and in the heat exchanger.

The deposits are recognizable as a jelly-like mass or, when the radiator is empty and dry, from a grey layer on the cooler connection pipes.

In this case, the cooling and heating system can be cleaned with a 10 % citric acid solution.

Radiators which have cooling pipes which are fully or partially clogged, must be renewed.

0015 - Cleaning, flushing cooling and heating system Engines 601, 602 (except 602.98), 603

Procedure for flushing operation

1 Remove coolant thermostat and install forcibly-opened thermostat 000 589 74 63 00 with sealing ring.

0015 - Cleaning, flushing cooling and heating system Engines 601, 602 (except 602.98), 603

Remove the locating lug (arrow) on a cap of the coolant thermostat.

2 Replace radiator (20-420).

0015 - Cleaning, flushing cooling and heating system Engines 601, 602 (except 602.98), 603

3 Connect flushing connection pipe part no.
117 589 00 90 00 with connection hose between radiator and coolant hose.

4 Connect a tap water hose to the flushing connection pipe.

5 Open cap of expansion tank.

6 Set heater to "warm".

Models with auxiliary heater

7 If automatic heating control is fitted, set the temperature selectors to "Max" or, if automatic climate control is fitted, press the "Defrost" button so that the circulation pump is switched on when the engine is running.

8 Open bleeder valve of the auxiliary heater.

9 Flush cooling and heating system with flowing water for approx. 5 minutes with the engine running (approx. 2500 rpm) so that the remaining coolant is flushed out.

During the flushing operation, the cooling system must always be completely filled. Adjust feed quantity accordingly. All drain plugs open.

10 Allow flushing water in the radiator and crankcase to drain out fully. Screw in drain plugs at radiator and crankcase.

11 Dissolve 1 kg citric acid powder (0.5 kg, part no. 000 989 16 25) in 5 liters of water in a suitable vessel.

12 Pour cleaning solution into the coolant expansion tank and top up with water as far as the marking on the expansion tank and top up with water.

13 Close bleeder screw of auxiliary heater.

14 Close cap of expansion tank.

15 Run engine for 15 minutes at approx.
2500 rpm and blip throttle. The solution must flow through the heat exchanger (step 6).

16 Following this, drain cleaning solution.

Empty the cleaning solution (citric acid mixture) into a standard workshop oil and water separator.

17 Open the bleeder screw of the auxiliary heater.

18 Flush cooling and heating system for approx. 5 minutes with flowing water with engine running (2500 rpm). The water must flow through the heat exchanger (see steps 6 and 9).

19 Remove flushing connection pipe and connect coolant hose to the radiator.

20 Install normal coolant thermostat with new seal.

21 Screw coolant drain plugs into radiator and crankcase.

22 Remove coolant expansion tank, flush out once again separately, and install.

Install modified coolant expansion tank with silica element.

Coolant expansion tank (with silica element)

Engine Model Part no.

602.91 124 124 500 17 49

602.96 (Turbo) 124 500 18 49

603.91 124 500 17 49

603.96 (Turbo) 124 500 18 49

0015 - Cleaning, flushing cooling and heating system Engines 601, 602 (except 602.98), 603

23 If car fitted with auxiliary heater, connect plastic hose to bleeder valve and open valve.

24 Pour in fresh anticorrosion/antifreeze agent (20-010).

25 Check cooling system for leaks (20-017).

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