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Home >> Audi >> 2012 >> Q7 3.0 TDI >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (3.0L - Cylinder Head & VALVETRAIN - Engine Code(S): CJTB, CJTC, CNAA, CJWB, CJWC, CJWE, CTWA, CTWB) >> 15 Cylinder Head, VALVETRAIN >> VALVETRAIN >> Valve Guides, Checking

Valve Guides, Checking

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required 

Procedure

NOTE:

If valve is replaced during repair, use new valve for measurement.

Due to different stem diameters, only use an intake valve in the intake valve guide and an exhaust valve in the exhaust valve guide.

-- Secure the Dial Gauge - 0-10mmVAS6079 on the cylinder head with the Dial Gauge HolderVW387 as shown in the illustration.

Fig 1: Determining Valve Rock (Wear Limit)
GWWV15-0133Courtesy of AUDI OF AMERICA, LLC

-- Place valve in valve guide.

-- Determine tip clearance.

-- If wear limit is exceeded, measure using new valves.

-- Replace the cylinder head if the wear limit is still exceeded.

NOTE:

The valve guides cannot be replaced.