TIMING CHAIN, CHAIN ADJUSTER CONSTRUCTION [AJ (3.0L Duratec)]

BUE011012201N01

Timing chain

• A silent timing chain has been adopted to reduce chain operating noise caused by the engagement of each sprocket.
• The timing chain tension is maintained constantly at all times by a chain adjuster.

1
Timing chain (RH)
2
Timing chain (LH)
3
Tensioner arm (LH)
4
Tensioner arm (RH)
5
Chain aduster (RH)
6
Chain aduster (LH)
7
Silent timing chain

Chain Adjuster

• An oil pressure type chain adjuster has been adopted.
• The chain adjuster consists of a rachet and rack that fixes the piston movement, a piston and spring that pushes the tensioner arm, and a check ball that maintains pressure on the tensioner arm.
• Panel springs on the back of the check ball and adjuster prevent oil in the adjuster from draining. Thus the chain adjuster can maintain the force that pushes the piston against the tensioner arm, even if the engine is not operated for a long period of time.

1
Cross-section of chain adjuster
2
Ratchet spring
3
Ratchet
4
Oil supply hole
5
Check ball
6
Rack
7
Piston spring
8
Piston
9
Piston spring
10
Oil outret hole
11
Panel spring