volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Intake Manifold|Service and Repair > < Intake Manifold|Specifications|Page 2087
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Intake Manifold: Testing and Inspection

Intake Air Pre-Heating, Checking

Special tools, testers and auxiliary items required

‹› Chilling Spray (commercially available)

‹› Installed only on cold climate vehicles.

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Remove the upper air filter housing and filter element. Refer to=> [ Air Filter Housing Overview ] See: Tune-up and Engine Performance
Checks/Air Cleaner Housing/Service and Repair.

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Check the position of the regulator flap - 1 -.

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Spray the thermal element - arrow - with chilling spray.

‹› The regulator flap must close the warm air connection completely at 14 °C (57 °F) and above.

‹› Below 0 °C (32 °F) the regulator flap must open the warm air connection completely.

Intake Manifold|Service and Repair > < Intake Manifold|Specifications|Page 2087