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Timing belt split in half!

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Old Feb 27, 2009 | 03:05 PM
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Default Timing belt split in half!

Has this ever happened to anyone? I cant figure out what it rubbed on. Crank positioning sensor? Nothing looked out of the ordinary when I took off the timing belt covers.

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Old Feb 27, 2009 | 03:07 PM
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Default Re: Timing belt split in half!

age/mileage of that belt? stock or aftermarket cam gears?
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Old Feb 27, 2009 | 03:11 PM
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Default Re: Timing belt split in half!

Originally Posted by non-vtec
age/mileage of that belt? Stock or aftermarket cam gears?
x2
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Old Feb 27, 2009 | 04:00 PM
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Default Re: Timing belt split in half!

Originally Posted by non-VTEC
age/mileage of that belt? stock or aftermarket cam gears?
1 year/20,000.

Toda cam gears.
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Old Feb 27, 2009 | 04:03 PM
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Default Re: Timing belt split in half!

looks like it sliped a couple of times then chewed the rest of the teeth off, but thats just a guess at what could of happend, still no good.
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Old Feb 27, 2009 | 04:11 PM
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Default Re: Timing belt split in half!

Would that be tensioner related?
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Old Feb 27, 2009 | 05:51 PM
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Default Re: Timing belt split in half!

I have had that happen to a car i worked on..... the problem was that the two big washers on the crank pulley were not there...the ones that gone before and after the timing belt is put on...... you might want to check on that and leave what you find out on the board
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Old Feb 27, 2009 | 07:05 PM
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Default Re: Timing belt split in half!

Ill check tomorow if the one before the timing belt is there. The one after is definitely there.

Thanks mang, im kind of worried of putting everything back together until I find what went wrong.
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Old Feb 27, 2009 | 07:08 PM
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Default Re: Timing belt split in half!

that made my heart skip a beat.
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Old Feb 28, 2009 | 10:06 AM
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Default Re: Timing belt split in half!

That looks like it was rubbing on something to me.
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Old Feb 28, 2009 | 02:35 PM
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Default Re: Timing belt split in half!

You sure a bolt didn't fall behind the crank cover. It was either too tight or too loose. It could have just been a brittle belt.
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Old Feb 28, 2009 | 02:37 PM
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Default Re: Timing belt split in half!

Or maybe using a stock timing belt on Toda C's? I really hope its that since I still cant find any wear marks.
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Old Feb 28, 2009 | 05:05 PM
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Default Re: Timing belt split in half!

Originally Posted by DIYMIKE
I have had that happen to a car i worked on..... the problem was that the two big washers on the crank pulley were not there...the ones that gone before and after the timing belt is put on...... you might want to check on that and leave what you find out on the board
So I took a gander, and I dont have two washers. What I outlined with the red box, is what I have. Do I need two 13 washers with timing belt drive #12? Or am I ok with just having one #13 washer with timing belt drive #12?

I noticed that the timing belt drive #11 isnt available anymore.

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Old Mar 1, 2009 | 11:06 AM
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Default Re: Timing belt split in half!

Another possibility is the bolt holding the tensioner bearing is bent. Put it back together with a new belt and turn it over by hand several times to see if the belt stays in line with the pulleys/gears. Make sure the water pump is not doing anything weird too.
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Old Feb 13, 2010 | 11:51 AM
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Default Re: Timing belt split in half!

wow thats weird did you get the washers you needed for it ?? and also what condition is your tensioner in ?
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Old Feb 13, 2010 | 11:53 AM
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Default Re: Timing belt split in half!

something haves to be rubbing that
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Old Feb 13, 2010 | 01:17 PM
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Default Re: Timing belt split in half!

Originally Posted by EM1Guru
Or maybe using a stock timing belt on Toda C's? I really hope its that since I still cant find any wear marks.
From what I recall (when the C's were released) lots of guys were running into flex/belt problems with the C's 2000-2003

Apparently they way they ramp is so agressive the cam gears flex/vibrate enough to snap belts...its been YEARS so I may have confused this with their springs but from what I recall is most likely valvetrain related....I'll do a search to confirm but thats what I remember off the top of my head with the C's..."they eat belts" was the avg response

Tried searching but can only go back to like 2006 or so...some of the others who have been here a while may chime in with their own Type C cam stories...valvetrain flex - belt snapping is a problem on big cams though...I thought the Greddy/Toda belts would last longer under those extreme cases though...might be a "grinding action" somewhere though...

Good luck

Last edited by SergEK; Feb 13, 2010 at 01:42 PM. Reason: search
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Old Feb 13, 2010 | 02:25 PM
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Default Re: Timing belt split in half!

Difference between snapping, and rubbing, that belt has signs of rubbing. Half the belt is gone, shut just doesn't happen like that. If it was slipping off, it would be the outer half that would of rubbed away first. As for the belt drive washer, they changed the style and the gear on the bottom has the washer built into it, you don't need the two little washers with that.
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Old Feb 13, 2010 | 04:02 PM
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Default Re: Timing belt split in half!

Id check your cam journals for wear. Ive seen a few engines (not just honda) where not enough oil was getting to the camshafts, thus resulting in the cam starting to lock up. This puts a tremendous load on the belt and eventually "pulls it apart"...
FYI- This also can happen on timing chain vehicles. About 2 weeks ago, I saw a nissan with a broken chain due to no oil to the head...Hope this isnt your problem...
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