how long do the timming chains last..on average?

iv a 93 4.3 vortec.........
i was wondering......about how long the timming chains last?

depends on how you drive it. Higher RPMs, low quality oil, late oil changes, etc will shorten it's life. My grandpa's got a Silverado with a 305. The timing chain in that lasted close to 200,000 miles. I have 158,000 miles on my Silverado 350 and the timing is starting to get a little bit sloppy (still runs great). I'll be putting aftermarket gears in it. They are fairly popular for the 350s, and should be the exact same size as the 262. I'd recommend getting a set of gears. They're a bit louder, but last almost forever.

Your right about J-Ri, but you failed to mention that most gear sets are noisy, so most people don't like them (although some people love the noise) If you found a quiet set please let us all know what type that you bought Thanks

gear set? whats that.......and why would you want gears insted of a chain.......?

?????? well....

A gear set has 2 big gears which go where the timing gears go on your engine... plus 2 gears held together with something that looks like a big chain link holding them together. This gear piece links the bigger gears together, replacing the timing chain.

This system lasts practically forever, and can never break.

Most racing motors use gears for reliability

oicccccc thnkz

iv a 93 4.3 vortec.........
i was wondering......about how long the timming chains last?

They usually last until they break. :lol2:

They usually last until they break.

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great insite.........how'd you ever come up with that masterfull comment

Years of experience.......Professor Blazee, Master of the Obvious

on a similar note - i've been hearing a chatter up there and it's almost like my chain is hitting the cover. possibility? i'm going to tear into it anyway but it would be cool to read something from you guys prior.

I have seen in Summit,noisy gears and quiet ones.

on a similar note - i've been hearing a chatter up there and it's almost like my chain is hitting the cover. possibility? i'm going to tear into it anyway but it would be cool to read something from you guys prior.
good time to change it then. Those covers can't be cheap to replace, plus when the timing chain in some engine's brake the valves hit the pistons causing severe damage.

I'd just stick to a quality timing chain and gears. Replace all the seals that you disturb while your at it.

When I got a cover it cost $40.00.