Why does the fan keep running after the Tiguan is parked?

[BenjaminDella]

Tiguan's fan continuing to run after parking is a normal phenomenon. The Volkswagen Tiguan uses a turbocharged engine. The biggest hazard of this engine's turbocharging system is that after the vehicle is parked, the engine stops running for a period of time, and the turbocharging system cannot dissipate heat. This can cause the turbo's oil seal to burn out. Over time, the turbo system will lose lubricating oil, leading to complete damage of the vehicle's turbocharging system. To compensate for this deficiency, the vehicle continues to run the fan after the engine is turned off, increasing the cooling time for the intercooler of the turbocharging system. This effectively extends the lifespan of the turbocharging system. Precautions for using a turbocharged engine: 1. Do not drive off immediately after starting: After starting the engine, especially in winter, let it idle for a while to allow the lubricating oil to fully lubricate the bearings before the turbocharger rotor operates at high speed. Therefore, avoid revving the engine hard immediately after starting to prevent damage to the turbocharger oil seal. 2. Do not turn off the engine immediately: After the engine has been running at high speed for a long time, do not turn it off immediately. During operation, part of the engine oil is used to lubricate and cool the turbocharger rotor bearings. 3. Keep it clean: When disassembling the turbocharger, maintain cleanliness. All pipe connections should be plugged with clean cloth to prevent debris from entering the turbocharger and damaging the rotor. During maintenance, be careful not to damage the impeller by collision. If the impeller needs to be replaced, perform a dynamic balance test. After reassembly, remove any plugs. 4. Perform regular cleaning: Since the turbocharger often operates at high temperatures, the lubricating oil lines can develop partial carbon deposits due to the heat, which may lead to insufficient lubrication of the turbocharger bearings and cause damage. Therefore, the lubricating oil lines should be cleaned periodically. 5. Pay attention to inspection and maintenance: Before driving and after parking, check the connections of the air ducts to prevent loosening or detachment, which could cause the turbocharger to fail or allow air to short-circuit into the cylinders.