Lower Timing Chain Cover, Removing And Installing: Installing

WARNING: This page is about a different car, the 2018 Audi A6 Quattro, 2017 Audi A6 Quattro, and 2016 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

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Install in reverse order of removal. Note the following:

NOTE:

Replace the bolts that were tightened with an additional turn.

Replacing the seals after removal.

-- Remove the right upper alignment bushing from the cylinder block.

-- Grind the alignment bushing down at an angle as shown in the illustration.

Dimension -x- = 6.5 mm.
Dimension -y- = 8 mm.

-- Insert the alignment bushing in the cylinder block so the angled side faces up.

NOTE:

Because of the chamfer, the lower timing chain cover can be positioned more easily when the cylinder head is installed.

CAUTION:

Risk of contaminating the lubricating system.

Cover open parts of engine.

WARNING:

Danger of eye injury.

Wear protective eyewear.

-- Remove any sealant residue still on the lower timing chain cover -1-, cylinder block and cylinder head with a rotating plastic brush.

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-- Clean any oil or grease off the sealing surfaces.

-- Clean the threaded holes in the cylinder block for connecting the engine and transmission using a thread tap before installing the transmission.

-- Clean old sealant out of the holes -arrow- in the cylinder head seals.

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NOTE:

With cylinder head installed, holes in cylinder head seal are only half visible.

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CAUTION:

The cylinder head seal could be damaged.

Only bend ends of cylinder head seals slightly, do not kink.

NOTE:

A kinked cylinder head seal must be replaced.

-- Bend the end of the cylinder head seals down slightly -arrows- until the upper sealing surface of the seals and the cylinder head can be cleaned.

-- Clean any oil and grease off the upper and lower cylinder head seals.

NOTE:

Pay attention to the expiration date of the sealant.

-- Cut the tube nozzle at the front marking (nozzle diameter: about 2 mm).

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-- Lightly the coat top and bottom cylinder head seal sealing surfaces with lubricant by bending the seals down slightly again -arrows-.

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-- Use a flat object such as a feeler gauge to coat the surface between the cylinder head and seal.

-- Fill the cleaned cylinder head seal holes -arrow- with sealant.

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CAUTION:

The lubrication system could be plugged with excess sealant.

Do not apply sealant bead thicker than indicated.

-- Apply sealant beads -1 through 3- on the clean lower timing chain cover sealing surfaces as shown in the illustration.

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The groove of sealing surface must be completely filled with sealant.
The sealant beads must be 1.5 to 2.0 mm above the sealing surface.
Draw through the sealant bead -3- as illustrated, even though the groove is intermittent.

NOTE:

The timing chain cover must be installed within 5 minutes after applying the sealant

-- Insert the seals -arrows- in the grooves on the lower timing chain cover.

-- Position the lower timing chain cover, guiding it diagonally from below to the sealing surface on the cylinder block and cylinder head.

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-- When positioning, ensure the cylinder head seals are not damaged.

-- Tighten the bolts. .

Installation is performed in reverse order of removal, while noting the following:

-- Install the crankshaft seal on the transmission side. Refer to CRANKSHAFT SEAL, REPLACING, TRANSMISSION SIDE .

-- Install the engine oil cooler. Refer to ENGINE OIL COOLER, REMOVING AND INSTALLING .

-- Install the oil filter element.

-- Install the left and right timing chain covers. Refer to TIMING CHAIN COVER, REMOVING AND INSTALLING .

-- Install the drive plate. Refer to DRIVE PLATE, REMOVING AND INSTALLING .

-- Fill the engine oil and check the oil level.