TIMING CHAIN, CHAIN TENSIONER CONSTRUCTION [LF, L3]

id0110a0101200

•  A silent chain (link grounding type) type has been adopted for the timing chain to reduce tapping noise caused by matching each sprocket.
•  Engine oil inside the engine front cover lubricates the timing chain and each sprocket. The pin part of the timing chain is nitrite-treated to improve abrasion resistance.

Timing Chain Specification.

ITEM

LF

L3

Pitch size
(mm {in})
8 {0.32}
6.35 {0.25}

am3zzn00001499

1
Camshaft sprocket
2
Tensioner arm
3
Chain tensioner
4
Chain guide
5
Crankshaft sprocket
6
Timing chain
7
Pitch size
8
Pin

•  Oil pressure type chain tensioner has been adopted for the timing chain tensioner. The tension of the timing chain is maintained constant, using the oil pressure and the spring force in the chain tensioner.
•  The oil pressure type chain tensioner consists of the following parts: Piston spring, which depresses the tensioner arm, check ball which maintains pressure to the tensioner arm.
am3zzn00001500

1
Hole for a ratchet lock
2
Oil supply hole
3
Check ball
4
Piston spring
5
Piston
6
Rack
7
Ratchet
8
Ratchet spring
9
Cross-section