ENGINE UNIT


  1. CONSTRUCTION


    1. In pursuit of high-precision valve timings, a roller chain (chain sub-assembly and No. 2 chain sub-assembly) with a 9.525 mm (0.375 in.) pitch is used to reduce wear and elongation.

    2. The No. 2 Chain Tensioner Sub-assembly and No. 3 Chain Tensioner Sub-assembly are used between the camshaft timing gear assembly and camshaft timing exhaust gear assembly to ensure quietness and reliability by suppressing vibrations in the chain sub-assembly between camshafts.

    3. The No. 1 chain tensioner assembly uses a spring and oil pressure to maintain proper chain tension at all times. The No. 1 chain tensioner assembly suppresses noise generated by the timing chain. Also, a ratchet construction is used to improve quietness during starting and low engine speeds.

    4. A resin with a friction reduction effect and high anti-friction performance is used for the shoes of the chain tensioner slipper and No. 1 chain vibration damper to improve low fuel consumption and reliability.

    5. Rubber has been applied to the face of the idle sprocket assembly to ensure quietness.

      A004CN5C01
      *1 No. 2 Chain Tensioner Sub-assembly *2 No. 1 Chain Tensioner Sub-assembly
      *3 Idle Sprocket Assembly *4 No. 3 Chain Tensioner Sub-assembly
      *5 Secondary Chain (No. 2 Chain Sub-assembly) *6 No. 1 Chain Vibration Damper
      *7 Primary Chain (Chain Sub-assembly) *8 Chain Tensioner Slipper
      *a Ball *b Ball Spring
      *c Main Spring *d Plunger
      *e Spring *f Cam
      *g Cam Spring - -