At what mileage did you change your v6 timing chain?

[Burt]

Now at 143000 miles. Full syn oil every 6000 miles. Never changed out the chain, and never will.
Most likely sell within few years anyway.

 

[2003 4Runner 4WD]

373k miles. Original timing chain.
Mobil 1 synthetic extended performance high mileage 5w-30.
Oil changes every 15k miles.

 

[_westtexasrunner_]

I thought that the 4.7 V8's had the infamous timing belt problems. I don't think you need to change a timing chain unless it needs it (hence why they switched back to a chain) because they are more durable. Or I could just be an idiot (very real possibility). Also, change the oil every ~5k ish.

 

[nevada]

I thought that the 4.7 V8's had the infamous timing belt problems. I don't think you need to change a timing chain unless it needs it (hence why they switched back to a chain) because they are more durable. Or I could just be an idiot (very real possibility). Also, change the oil every ~5k ish.

what problem would that be?

 

[Bumbo]

203k miles

Never touched the chain and hope I never have to... still going strong and I hope it stays that way for miles and miles.

 

[GupsT4R]

sadly at 190km

 

[rwh963]

210k on mine (meaning still on the original).

 

[_westtexasrunner_]

what problem would that be?

I think they would wear out after about ~100k. My Father had a GX with the 4.7 and his wore out right at 100000, as did my Mom's at a slightly higher mileage. I think (?) that the 4Runners equipped with the V8 had the exact same engine as the GX 470's.

 

[nevada]

I think they would wear out after about ~100k. My Father had a GX with the 4.7 and his wore out right at 100000, as did my Mom's at a slightly higher mileage. I think (?) that the 4Runners equipped with the V8 had the exact same engine as the GX 470's.

ah. that's not really a problem/flaw inherent to the v8 engine. its EVERY timing belt engine. the belt is a maintenance item. our are good for 90k, others are only 60k. not a problem, just a different design.

 

[gaber6]

I put the original back in at 170k when I did the head gaskets. It was in new condition.

 

[Nevek08]

I put the original back in at 170k when I did the head gaskets. It was in new condition.

Were you not tempted to change it while you were in there? I've been told that if I'm opening it up I should change the chains and tensioners.. Its a pretty penny but if I dont have to worry about it in the future I think it would be worth it.

 

[2003-4x4runner]

I wonder how often you change your oil.

Oil change every 5k miles with conventional oil.

 

[joevan]

I'm at 513,535 miles, and I still have the original chain. Also, not that this suddenly on oil change thread but I use Mobil 1 Extended Performance and change every 15k+.

That's awesome.
We just started using Mobil 1 at 160 K on our 06

 

[gaber6]

Were you not tempted to change it while you were in there? I've been told that if I'm opening it up I should change the chains and tensioners.. Its a pretty penny but if I dont have to worry about it in the future I think it would be worth it.

Not one bit tempted. The block metal was coated evenly with a gold color of warm heated oil. The plastic tensioners were barely marked and the chain lined up exactly to the marks when re-installed. It was a one-owner vehicle driven in Nevada, so warm/cold cycles were likely less extreme than a northern vehicle. It's been 20k miles since the re-install and with 180k miles it still idles like a new car.

My only regret on the re-install was getting a generic water pump because it came with a non-metallic gasket seal, and that leaked after a few weeks which added a few hours to repair again.