Audi Workshop Service and Repair Manuals

Removing

• ‒ → Remove oil dipstick -1- from guide tube.
• ‒ Unclip caps.
• ‒ Unscrew nuts -arrows- and remove engine cover.
• ‒ Reinsert oil dipstick in guide tube.

• ‒ → Remove air duct hose-1- from air duct pipe.
• ‒ Detach connector of air mass meter -3-.
• ‒ Unscrew bolts -4- and -5-.
• ‒ Remove vent hose -2- from rear of air cleaner housing.
• ‒ Take out air cleaner housing.

• ‒ Remove air duct pipe from air filter to turbocharger.

• ‒ → Unscrew oil feed line from exhaust turbocharger and exhaust manifold -arrows-.

• ‒ → Unscrew oil feed line from oil filter bracket -arrow- and also on cylinder head and lay line aside.

• ‒ → Remove bolt -1- from above.

• ‒ → Remove lower air duct pipe -arrows-.

• ‒ → Remove noise insulation in centre and on right -arrows-.

• ‒ → Unbolt heat shield for right drive shaft -arrows-.

• ‒ → Unbolt bracket for exhaust system from assembly mounting -arrows-.

Note:

The isolating element in front exhaust pipe must not be deflected more than 10°to avoid damage.

• ‒ → Unscrew securing bolts -arrows- of front exhaust pipe/exhaust turbocharger.

• ‒ → Detach the exhaust system at the clamping sleeve -arrows-.
• ‒ Remove the front exhaust pipe.

• ‒ Disconnect hose to boost pressure control solenoid valve -N75 at turbocharger or unscrew banjo bolt, respectively.
• ‒ Disconnect hose at boost pressure valve pressure unit.
• ‒ Remove air duct hoses at turbocharger.
• ‒ → Detach the oil return line at cylinder block -arrow-.

• ‒ → Screw out nut -2- from below.
• ‒ Remove the turbocharger.

Installing

Installation is carried out in the reverse order; note the following:

Notes:

• ◆ Always replace seals, gaskets and self-locking nuts.
• ◆ Note installation position of exhaust manifold/exhaust turbocharger gaskets.
• ◆ Fill the turbocharger with engine oil via the oil feed connection.
• ◆ Secure all hose connections with the correct hose clamps (same as original equipment):

=> Parts List

• ◆ Hose connections and hoses for charge air system must be free of oil and grease before assembly.

• ‒ Slide the hose onto the boost pressure valve pressure unit and secure it using a hose clamp.

• ‒ → Position turbocharger on exhaust manifold and hand-tighten securing nut -2- after coating it with high-temperature lubricant.

• ◆ High-temperature lubricant

=> Parts List

• ‒ Coat threads and bolt head contact surface of securing bolts -1- with high temperature lubricant.
• ‒ Tighten the securing bolts -1- to 30 Nm and the fastening nut -2- to 25 Nm.
• ‒ Install exhaust system and align it stress-free .
• ‒ Check oil level => Page 17-21.

Note:

After installing the turbocharger, run engine for approx. 1 minute at idling speed; do not rev up immediately. This ensures the turbocharger is properly lubricated.

Tightening torques

    1)    Replace bolts

    2)    Replace the nuts.

    3)    Coat threads and bolt head seating surface with high-temperature lubricant;
        High-temperature lubricant

=> Parts List