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Home >> Audi >> 2025 >> S4 Premium >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Cylinder Head, VALVETRAIN (Servicing - 6-Cylinder 2.9L; 3.0L 4V TFSI Ea839 Engine) >> 15 Cylinder Head, VALVETRAIN >> Cylinder Head >> Camshaft Housing, Removing And Installing >> Cylinder Bank 1 (Right) Camshaft Housing, Removing And Installing >> Installing

Cylinder Bank 1 (Right) Camshaft Housing, Removing And Installing: Installing

When only one camshaft housing is removed the "TDC" position of the camshaft must be checked when the camshaft housing is installed.

CAUTION:

Risk of destroying the engine by adjusting the valve timing.

- The camshafts must be in TDC point.

-- Remove the bolt -3- and the plug -2-.

GWWA15-11946Courtesy of AUDI OF AMERICA, LLC
CAUTION:

Risk of contaminating the lubricating system.

- Cover open engine components.

Fig 1: Cleaning Sealing Surfaces
GWWA17-10940Courtesy of AUDI OF AMERICA, LLC
CAUTION:

Risk of injuring the eyes from sealant residue.

- Wear protective eyewear.

-- Remove any sealant residue on the camshaft housing -1- and cylinder head using a rotating plastic brush.

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

-- Lubricate the running surfaces of both camshafts.

-- Cut the tube nozzle at the front marking (nozzle diameter: about 2.5 mm).

-- Position the seal -4-.

GWWA15-12028Courtesy of AUDI OF AMERICA, LLC
CAUTION:

There is a risk that the lubrication system could be blocked by excess sealant.

- Do not apply sealant bead thicker than indicated.

-- Apply sealant beads -1, 2 and 3- on the clean sealing surfaces of the camshaft housings.

-- Position the camshaft housing -1- on the cylinder head but do not press on the sealant beads yet.

GWWA15-12045Courtesy of AUDI OF AMERICA, LLC

-- Insert the Locating Pins :T40116  into the camshaft housing and cylinder head.

-- Next install all bolts for the camshaft housing by hand and then tighten.

-- Remove the Locating Pins :T40116  with the Injector/Combustion Chamber Seal Tool Set - Sliding Hammer :T10133/3  .

GWWA15-11947Courtesy of AUDI OF AMERICA, LLC

Install in reverse order of removal. Note the following:

-- Insert the lower section of the noise insulation.

-- Install the fuel injectors. Refer to FUEL INJECTORS, REMOVING AND INSTALLING .

-- Position the camshaft timing chain (adjust the valve timing). Refer to CAMSHAFT TIMING CHAIN, REMOVING FROM CAMSHAFTS .

-- Install the high pressure pump. Refer to HIGH PRESSURE PUMP, REMOVING AND INSTALLING .

There may be additional procedures depending on the model. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .