BMW N62B44 Manual page 39

Tensioning Rail Bearing Pin
The bearing pin for the cylinder bank 1-4 drive
chain tensioning rail is hollowed. There is a ball
(check) valve in the bearing pin. The valve
opens at an oil pressure of 1 bar and allows
engine oil to flow to the tensioning rail via a port
(1).
1. Engine Oil Port to Tensioning Rail
2. Ball (check) Valve
3. Bearing Pin
4. Sealing Rings for Sealing the Tensioning Rail
Chain Tensioner (cylinder bank 5-8)
An oil jet has been fitted to lubricate the cylinder bank
5-8 drive chain. There is a valve in the oil jet which
opens at a pressure of 1 bar and supplies the drive
chain with engine oil.
1. Chain Tensioner
2. Tensioning Rail
3. Oil Jet
N N o o t t e e : : Refer to the Repair Instructions when using the
Special Tools shown below to adjust the camshaft tim-
ing.
42-02-78
Tensioning Rail Bearing Pin
Chain Tensioner
42-02-53
42-02-54
42-02-79
37
N62 Engine