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Home >> Audi >> 2025 >> S4 Premium >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Cooling System (6-Cylinder Direct Fuel Injection 2.9L; 3.0L 4V TFSI Engine) >> 19 Cooling System >> Coolant Pipes >> Coolant Pipes, Removing And Installing >> Left Rear Coolant Pipe, Removing And Installing, 2.9L Engine >> Installing

Left Rear Coolant Pipe, Removing And Installing, 2.9L Engine: Installing

Install in the reverse order of removal while noting the following:

-- Coat the seal and O-ring with coolant and install them.

-- Vehicle with particulate filter: install the left catalytic converter. Refer to CATALYTIC CONVERTER, REMOVING AND INSTALLING, 2.9L ENGINE WITH PARTICULATE FILTER .

-- Install the heat shield and engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Fill the coolant. Refer to COOLANT, DRAINING AND FILLING, 2.9L ENGINE .