Fastener Tightening Specifications

Component

Bolt Size

Air Guide Pipe to Bracket

Bracket for Turbocharger ⁽⁵⁾

Charge Air Pipe

Charge Air Pressure Sensor

Connection

Coolant Return Line ⁽³⁾

Coolant Supply Line ⁽²⁾

Fastening Strip, Nut ⁽⁴⁾⁽⁵⁾

Mount for Charge Air Cooler

Oil Supply Line ⁽¹⁾

⁽⁵⁾

Oil Return Line

Right Air Guide Pipe to the Oil Pan

Turbocharger Vacuum Diaphragm

Bolt

Nut ⁽⁶⁾

Turbocharger Recirculating Valve

Wastegate Bypass Regulator Valve

⁽¹⁾	For bolt tightening clarification, refer to Part II Figure and see items -2, 5 and 6-

⁽²⁾	For bolt tightening clarification, refer to Part II Figure and see items -8, 9 and 10-

⁽³⁾	For bolt tightening clarification, refer to Part III Figure and see items -3 and 6-

⁽⁴⁾	Always replace

⁽⁵⁾	Coat the bolt with hot bolt paste

⁽⁶⁾	Secure with sealing wax

Turbocharger - Tightening Sequence

Fig 1: Identifying Turbocharger Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts -1 through 5- in 4 stages as follows:

-- 1. Tighten the bolts to 5 Nm.

-- 2. Tighten the bolts to 12 Nm.

-- 3. Tighten the bolts to 16 Nm.

-- 4. Tighten the bolts to 25 Nm.