Fig. 2.26. Timing chain tensioner: 1 – ratchet mechanism hole; 2 – oil supply hole; 3 – check valve; 4 – piston spring; 5 – piston; 6 – toothed rack; 7 – ratchet; 8 – ratchet spring; 9 – section
The timing chain tensioner is oil-filled. The timing chain tension is maintained constant by using oil pressure and the force of the chain tensioner spring. The oil-filled chain tensioner has the following parts: a piston spring that acts on the tensioner lever; a check valve that maintains the force on the tensioner lever (Fig. 2.26).