Technical characteristics of the valve timing mechanism of the 16-valve engine (Opel Kadett E)

The "20XE" engine uses a 16-valve valve mechanism with two camshafts (inlet and outlet) overhead. The camshafts are driven by a toothed belt from the crankshaft pulley.

Camshaft drive belt

Number of teeth: 141.

Width, mm: 24.

Belt tension when adjusted using the KM 510-A device:

new belt:

• on a cold engine: 4.5;
• on a warm engine: 7.5.

of the belt that has worked:

• on a cold engine: 2.5;
• on a warm engine: 7.0.

Camshafts

The camshafts are made of cast iron with surface hardening and nitriding. The shafts are not marked.

[Text copied from this portal: www.OpelBook.ru]

Radial runout of the middle journal relative to the outer journals, measured at the centers, mm: 0.04.

Axial clearance of the camshaft, mm: 0.04-0.144.

Cam lift, mm: 9.5.

Neck diameter, mm: 27.939-27.960.

Diameter of bearing holes in cylinder head, mm: 28.000-28.021.

Valve timing*

*Without taking into account the calculated clearances in the valve drive mechanism due to the use of hydraulic tappets in the drive.