Audi Workshop Service and Repair Manuals > A4 Mk3 > Power unit | 6-cylinder TDI engine (2.7 ltr.; 3.0 ltr. 4-valve common rail), mechanics | Engine cylinder head, valve gear | Valve gear | Checking hydraulic valve compensation elements

Checking hydraulic valve compensation elements

Note

t	Hydraulic compensation elements cannot be serviced.

t	Irregular valve noises when starting engine are normal.

Special tools and workshop equipment required

t	Feeler gauge

t	Adapter -T40058- for vehicles with multitronic gearbox 0AW/dual clutch gearbox 0B5/automatic gearbox 0B6

Procedure

–	Start engine and run until radiator fan has started up once.

–	Increase engine speed to approx. 2500 rpm for 2 minutes (perform road test if necessary).

–	If the compensation elements are still noisy, locate the defective compensation element as follows:

–	Remove cylinder head cover: left-side → Chapter; right-side → Chapter.

–	Turn crankshaft as follows until cams of compensation element to be tested are at top:

Vehicles with manual gearbox:

–	Push vehicle forwards with 4th gear engaged and ignition switched off.

Vehicles with multitronic gearbox 0AW/dual clutch gearbox 0B5/automatic gearbox 0B6:

–	Remove front noise insulation -1- → Rep. gr.66.

–	Insert guide pin of adapter -T40058- as follows:

l	The larger-diameter section -arrow 1- faces towards the engine.

l	The smaller-diameter section -arrow 2- faces the adapter.

–	Turn crankshaft with adapter -T40058- in normal direction of rotation -arrow-.

All vehicles (continued):

–	Press roller rocker finger down -arrow- to determine clearance between cam and roller rocker finger.

–	If it is possible to insert a feeler gauge of 0.20 mm between cam and roller rocker finger, renew compensation element: cylinder head (left-side) → Chapter, cylinder head (right-side) → Chapter.

Additional steps required

–	Install cylinder head cover: left-side → Chapter; right-side → Chapter.

–	Install front noise insulation → Rep. gr.66.

Audi Workshop Service and Repair Manuals