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Home >> Audi >> 2007 >> A3 Quattro >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (2.0L - Turbocharger, Supercharger - Engine Code(S): CBFA & CCTA) >> 21 Turbocharger, Supercharger >> Specifications >> Fastener Tightening Specifications

Fastener Tightening Specifications

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Component Bolt Size Nm
Air Guide Pipe to Bracket   10
Bearings to charge air cooler   5
Bracket for Turbocharger   30
Charge air pipe to body   10
Charge air pipe to charge air hose   10
Charge air pressure sensor to charge air pipe   5
Connection to turbocharger   9
Coolant Return Line (3)
    9
    35
Coolant Supply Line (2)
    9
    35
Clamping Strip, Nut (4)   30
Oil Supply Line (1)
    9
    30
Oil Return Line   9
Right Air Guide Pipe to the Oil Pan   10
Turbocharger recirculating valve to turbocharger   7
Turbocharger Vacuum Diaphragm
Bolt   10
Nut   9
Wastegate bypass regulator valve to turbocharger   3
(1) For bolt tightening clarification, PART II  and see items -2, 5 and 6-
(2) For bolt tightening clarification, PART II  and see items -8, 9 and 10-
(3) For bolt tightening clarification, PART III  and see items -3 and 6-
(4) Always replace

Turbocharger - Tightening Sequence 

Fig 1: Identifying Turbocharger Tightening Sequence
GWWA21-10341Courtesy 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.