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if you change the oil you will probably never need to change the timing chain.
I tore apart my old 1988 nissan pickup Z24 engine to change the timing chain. Because it had 250,000 miles on it. Come to find the gears and chain were clean, no bow on the chain once removed, no wear marks on either gears or chain and almost like new. and could probably have easily gone at least another 50,000 miles. ( a worn timing chain and gears can often be spotted just by removing the approriate covers andlooking at them - if worn the gears often have a round wear ridge under each tooth.) The only worn part was the tensioner, which on the nissan z24 engine is a spring-loaded rubber block.
This engine had its oil changed (dinon oil) every 2500 miles.
If i had to do it again i'd just replace the tensioner for $20 and let it go until the chain started making noise!
Last edited by AlmightyCamry777; 03-04-2010 at 11:28 AM.
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