Skoda Workshop Service and Repair Manuals > Octavia Mk1 > Drive unit | 1.6 ltr./74 kW Engine - Mechanical Components | Engine cooling | Removing and installing parts of the cooling system

Draining and filling up coolant

Coolant capacity approx. 5.0 litres

Special tools, test equipment as well as aids required

t	Catch pan (e.g. -V.A.G 1306-)

t	antifreeze tester

Draining

WARNING

Hot steam may escape when the compensation bottle is opened. Cover the cap with a cloth and open carefully.

–	Open the cap of the coolant expansion reservoir.

–	Remove noise insulation in middle -arrows- in top half of Fig.

–	Position drip tray (e.g. -V.A.G 1306-) under the engine.

–	Turn the drain plug -arrow- on the radiator to the left and draw backwards, if necessary fit auxiliary hose onto connection.

–	In addition, detach coolant hose at bottom of oil cooler -arrow- and allow remaining coolant to drain.

Note

t	Collect drained coolant for proper disposal.

t	Observe the disposal instructions for coolant.

Filling up

Select the appropriate coolant additive from the catalogue of original parts Škoda or from the list of allowed coolant additives → Octavia.

Recommended mixture ratios:

Antifreeze protection down to	Antifreeze concentration → Note → Note		Drinking water → Note
-25°C -35°C	40% (2.0 ltr.) 50% (2.5 ltr.)		60% (3.0 ltr.) 50% (2.5 ltr.)

¹⁾	The proportion of coolant additive must not go below 30% due to corrosion protection considerations but must also not exceed 60% otherwise the frost protection effect will be reduced and the cooling effect worsened.

²⁾	The coolant amount may differ according to the version of the vehicle.

–	Screw in drain valve for coolant.

–	Attach coolant hose to bottom of oil cooler.

–	Fill up coolant gradually up to the “max” marking on the compensation bottle.

–	Start engine and run for not more than 2 minutes at approx. 1500 rpm; while doing so top up coolant in the expansion reservoir up to overflow opening.

–	Seal expansion reservoir.

–	Run engine until fan starts.

WARNING

Hot steam may escape when the compensation bottle is opened. Cover the cap with cloths and open carefully.

–	Inspect coolant level. When engine is at operating temperature the coolant level must be at the maximum marking, when engine is cold between the minimum and the maximum markings.

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