From Citroen-SM-wiki

There are three chains in the engine:

• One primary chain from a sprocket pressed onto the crankshaft to the intermediate shaft (jackshaft)
• Two secondary (upper) chains from jackshaft to camshafts

Contents 1 Chain Dimensions 1.1 Chain Type 1.2 Primary Chain 1.3 Secondary Chain 2 Vendors 3 See Also

[edit] Chain Dimensions

[edit] Chain Type

• Both chains are 0.375 pitch double-row

[edit] Primary Chain

• 74 links -> 29.750" long

[edit] Secondary Chain

• 102 links -> 38.50" long
  • (each)

[edit] Vendors

• Renold
  • Formerly known as "BRAMPTON"
    • Chains marked this way are likely NOS and should not be fitted as they are early technology
  • "Synergy" is their state-of-the-art version
    • Highly recommended
• "IWIS"
  • As used on 1991 Mercedes 420 SEL
  • These are still supplied by SM Club de France

[edit] See Also

• Chain Replacement
• Primary Chain Tensioner
• Primary Chain Oil Spray