Don't know why but the spring snapped.

 

Ouch! Sorry to see it, bud. Any permanent damage? Or were you lucky to come out "scott-free"?

 

Well, I appreciate the sentiment, however, this was an unfortunate customers vehicle. Luckily for them nobody was hurt and the car was still in the factory warranty. Though, I am sure that if this happened anywhere within the first Tbelt lifespan, but out of warranty, Honda would have stepped up.

No bent valves. Just replaced the tensioner, spring, belt and crank sensor. Suprisingly, started and ran fine.

 

damn, thats pretty scary. arent h22's pretty notorious for that too?

 

that's rediculous. I've had d15's and b18's in the 200k range with the original spring... I hope this is a freakishly rare thing.

 

These engines use a floating tensioner so the spring actually HAS to do something all the time. Most other engines use a lock nut or bolt so the spring only sets the tension before the pully is locked down. Only time I've seen this, though. You can see how the spring lodged itself at the crank and ripped the belt into two nearly complete strips.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by phootbag &raquo;</TD></TR><TR><TD CLASS="quote">These engines use a floating tensioner so the spring actually HAS to do something all the time. Most other engines use a lock nut or bolt so the spring only sets the tension before the pully is locked down. Only time I've seen this, though. You can see how the spring lodged itself at the crank and ripped the belt into two nearly complete strips. </TD></TR></TABLE>

interesting, but I see the standard d-series lock bolt on the tensioner in the picture. you're saying that its still floating somehow even with that bolt on there? I know how small those springs are and I certainly wouldn't trust them to hold the t-belt in place, they're only good for those first couple rotations where you are setting the belt, I can't believe that Honda would trust them to hold the tension of the belt. Are you sure you're not mistaken?

one way or the other, the spring broke, slipped off, or something and rattled its way free and ended up in the belt...

do you have an -after- picture of the mangled spring?

 

When I do these Tbelts I insert a hex tool into the tensioner and push upward to relieve the tension. This acts against the spring. I have never removed the bolt when doing these belts. Slick design until something happens...

Unfortunately, I don't have a picture of the mangled spring even though I actually found it in the bottom of the lower timing cover. One of the hooks on the spring was snapped off and the rest of the spring was flattened, like a stack of dimes that fell over.