Checking Valve Stem Guide
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.
- Turn the cylinder head so that the compression chamber is visible.
Information
Given the different valve-stem dimensions, only use the intake valve in the intake guide and the outlet valve in the outlet guide.
- Insert the valve into the valve stem guide.
- The end of the valve stem must be flush with the end of the valve guide.
NOTE: Dirt and contamination- Risk of damage to units or components
→ Protect components from dirt and contamination.
→ Clean or replace dirty components.
- Secure the Universal Dial Gauge Bracket VW 387 (-1- ) on the cylinder head. Secure a suitable dial gauge with a measuring tip in the universal dial gauge bracket.
- To measure the valve tilt clearance:
- Position the measuring tip securely on the side of the valve disc and tilt the valve back and forth in the valve guide -arrow-
.
- Wear limit: 1.0 mm.
Information
- If the wear limit is exceeded, repeat the measurement with new valves. If the wear limit is still exceeded, replace the cylinder head. The valve guides cannot be replaced .
- If the valve is replaced during repairs, use a new valve for the measurement .