how can we adjust timing chain tension on 2000 Toyota Echo

a rattle in top left moter.just a littler to start with now most of the time sounds like a pulley lose we have no code for this

by in Rush, KY on July 24, 2013
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1 answer
ANSWER by , July 24, 2013
Timing chain tensioner or guides may be worn out. Might want to replace as complete set(chain , guides and tensioner) depending on miles and general condition of car.