Cooling System: Testing and Inspection

Checking cooling system

Tools





Checking

Coolant - check antifreeze and fluid level

Note: The coolant filled in at the factory is intended for lifetime cooling and, thus, need not be changed.





WARNING: Danger of scalding from hot pressurised coolant.
^ Only work on the coolant system when the engine is "cool".
^ Wear protective gloves and goggles.

WARNING: Coolant is corrosive and hazardous to health.
^ Skin and eye irritation
^ Wear protective gloves and goggles.
^ If you come into contact with coolant, wash off immediately with plenty of warm water.

ATTENTION: Mixing coolant.
^ Corrosion of components and flocculation of coolant
^ Do not mix Porsche coolant with other coolants.
^ When replacing or topping up coolant, use only original Porsche coolant (see Porsche Parts Catalogue).

1. Check antifreeze content. To do this, open the lid on the coolant expansion tank and check with an anti-freeze testing device. If this is below -35°C, correct the anti-freeze content by raising the proportion of pure coolant accordingly

Checking the cooling system for leaks





WARNING: Danger of scalding from hot pressurised coolant.
^ Only work on the coolant system when the engine is "cool".
^ Wear protective gloves and goggles.

1. Check the cooling system for leaks. To do this, apply a test pressure of approx. 1 bar and check hose connections for leakage

Cleaning the cooling air guides





ATTENTION: Soiling and damage to radiator surface (vanes).
^ Engine overheating due to lack of cooling performance.
^ Clean radiator surface regularly.
^ Do not use a high-pressure steam cleaner to clean it.

1. Check cooling air guides and radiator for foreign bodies such as leaves. If necessary, carefully clean the cooling air guides and radiator surfaces at the front using a vacuum cleaner with a single nozzle, see Vacuum cleaner nozzle, long crevice tool for cleaning cooling air inlet shafts NR.160. When using high-pressure steam cleaners, the steam jets can cause additional particles of dirt to attach to the radiator surfaces and the engine can overheat due to reduced cooling performance

Checking the antifreeze content using a refractometer





Note:
^ The following diagram shows the scale used by Leitenberger
^ The scales can vary, depending on the manufacturer, observe the operating instructions
^ Use the "ETHYLENE" scale for Porsche coolant.





1. The correct antifreeze content can be read off the ETHYLENE scale





2. Using a pipette, take a sample from the coolant expansion tank.





3. Close the light-diffusing lens. closed film of liquid must form.

Note: The following table specifies how much coolant must be replaced by pure coolant in order to adjust the freezing point to -37 °C.

4. Hold the refractometer against a bright light source. clear light/dark limit emerges. The point of intersection between this line and the display scale marks the freezing point of the coolant freezing point that is too low must be adjusted according to the following table