Volkswagen Workshop Service and Repair Manuals

Operational and hose layout diagram

Note:

When connecting the thermopneumatic valves, ensure that the vacuum hose to the operational part is attached to the off-centre -straight- connection. The hose from the vacuum take-off is to be attached to the other -usually angled- connection.

• Carburettor
• Air cleaner
• Air pump
• ◆ For exhaust afterburning
• Control valve
• ◆ For exhaust afterburning

• Check valve
• ◆ For exhaust afterburning
• Anti-backfire valve
• ◆ For exhaust afterburning
• Distributor
• EGR valve
• ◆ Automatic gearbox only
• Thermopneumatic valve
• ◆ For cold idle valve
• Thermopneumatic valve
• ◆ For exhaust afterburning
• Cold idle valve
• Retarding valve
• ◆ Manual gearbox only
• Check valve
• ◆ For brake servo
• Brake servo