Check changeover of radiator for exhaust gas recirculation Special tools and workshop equipment required t  Hand vacuum pump, e.g. -VAS 6213- Work procedure   Note The vacuum setting element for change-over flap is accessible from below. –  Remove the sound dampening system → Body Work; Rep. gr.50. –  Unbolt heat shield for right drive shaft.

–  Detach vacuum hose from vacuum setting element. –  Connect hand vacuum pump to vacuum setting element. –  Actuate the hand vacuum pump in order to generate negative pressure. l  The vacuum setting element must open the change-over flap up to the stop at maximum 0.08 MPa (0.8 bar) negative pressure and in case of ventilation close it up to the stop -arrows-.   Note t  For this test the opening of the change-over flap can be performed in jolts. In driving mode the change-over flap opens suddenly due to the large negative pressure volume. t  The closing of the change-over flap must be carried out suddenly when ventilating (e.g. detach vacuum hose). If the vacuum setting element does not open or close the change-over flap up to the stop: –  Replace radiator for exhaust gas recirculation with vacuum setting element → Chapter.

Power unit > 1.6/55; 66; 77 kW TDI CR Engine > Exhaust system > Exhaust gas recirculation system > Check changeover of radiator for exhaust gas recirculation