Lower Timing Chain Cover - Tightening Specification and Sequence: Vehicles with Magnesium Oil Pan Upper Section

WARNING: This page is about a different car, the 2015 Audi A7 Quattro and 2014 Audi A7 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Identifying "MRI"

Courtesy of AUDI OF AMERICA, LLC

Characteristic for Magnesium Oil Pan Upper Sections

NOTE: Replace the bolts that were tightened with an additional turn.

CAUTION:

Aluminum bolts under the drive chain may become damaged during installation.

Do not use aluminum bolts to tighten the timing chain guard lower section to the cylinder block.
Therefore use four M6x20 steel bolts to tighten the timing chain guard lower section as instructed as follows.

-- Tighten the bolts in 9 steps as follows:

Steps 1, 2:

Fig 2: Identifying Bolts

Courtesy of AUDI OF AMERICA, LLC

Step	Bolts	Tightening Specification
1.	-	Attaching the timing chain guard lower section with the sealant and the sealing pieces to the cylinder block
2.	-1, 2, 3, and 4-	Tighten the M6x20 to 9 Nm

Step: 3 to 6:

Fig 3: Identifying Bolts

Courtesy of AUDI OF AMERICA, LLC

Step	Bolts	Tightening Specification/Additional Turn
3.	-1 to 20-	3 Nm
4.	-1 to 20-	3 Nm - this measurement takes into account the timing chain guard lower section shrinkage.
5.	-1 to 6-	8 Nm
6.	-1 to 20-	Tighten an additional 90°

Steps 7 to 9:

Fig 4: Identifying Bolts

Courtesy of AUDI OF AMERICA, LLC

Step	Bolts	Tightening Specification/Additional Turn
7.	-1, 2, 3, and 4-	Remove the steel bolts M6x20
8.	-1, 2, 3, and 4-	Insert the aluminum bolts and tighten to 3 Nm
9.	-1, 2, 3, and 4-	Turn the aluminum bolts 90° further