Why does Honda insist on using timing belts instead of chains?

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OP,

Have you considered asking Honda/Engineering division? I would go to the source, in lieu of anecdotal responses from anonymous. Just thinking! Merry Christmas sir..
 
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I believe the interval for checking valve clearance is actually 60,000 miles. May be up to 7 missed adjustments.
You are correct. I started at the back of the 2004 Corolla maintenance book, and took the first one.

But the interval is 60,000 miles.

Thanks for the correction.

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Mmmmmm glorious 5 cylinder noises 🤤

I don't generally mind timing belt engines... all three of our current vehicles have timing belts. And I've done the TB service on a J35 in an Odyssey and I didn't think it was too hard. But the T5 in my Volvo S40 is not fun to do at all because 5 transverse cylinders in a compact car is such a tight squeeze.
 
This isn’t exactly true. Excluding the ea888 gen 3 all the 4 cyl or less now use belts. All engines over 4 cyl use chains with no issues on any of the current production units.
wasn't it the tensioners that would always fail?
 
I don't get it. Chains are far superior, yet Honda keeps using belts...makes no sense...
I'm not certain if chains are superior, but Honda belts are super easy to replace in the J series - maybe 3-4 hours even for a DIY like me. I've changed 4 of them now. 3 were right around the 100k mark and the belts looked just fine. 1 was in a co-worker's Honda Pilot with 190k miles on the original and it was well past its prime. Personally, I love the design of the J30/32/35 and think it is one of the best V6 engines ever made.
 
The premise of this thread is just not correct as others have pointed out since Honda only makes one engine now (the J-series V6) that uses a timing chain. If we had this discussion back in the 90's then it would of been a valid point. Honda is also using the J-series less now as the turbo 4's are taking it's place in applications like the Accord.
 
wasn't it the tensioners that would always fail?
Yes, the original design of tensioner is the week link in the ea888 gen 2. It’s designed to ratchet out and take up the slack but the teeth brake off and allow the chain to slacken off on start up. Timing jumps, game over. The issue of chain wear/ stretch is a secondary issue that in my experience if the latest tensioner is fitted and the oil is changed on time with 504/507 isn’t an issue. Neglect an engine anything can go wrong!
 
I shouldn't say the valve clearance has never been checked on my Corolla because it had 148K on it when I bought it. The original owner may have had it done, but it hasn't been since I've owned it...
 
If the exhaust valves aren't already riding the base circle of the cam Id wager they are really close to it.
this is why the UZ V8 and lots of other direct bucket engines have no interval at all.

they will make it beyond the lifespan of the vehicle and then some 99 times out of 100
 
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