Timing Belt Snapped

Continuing on from here:
http://www.ozhonda.com/forum/showthr...=101278&page=2

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Originally Posted by dsp26

have fun gents scrap me off the list. timing belt snapped... asshole!! ggrrr hope nothing else broke

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Originally Posted by Benson

Ron, thats some bad luck man.. Hope it works out for you..

Did you change to a new belt when you did the new cams?

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Originally Posted by bennjamin

WTF

jeebus i hope you aint running a gatesor other aftermarket item.....Ron get it fixed asap and get out here !

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Quote:

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Originally Posted by dsp26

i was sooo gee'd for tomorrow dammit.

oem Honda belt brand new when my motor was put together.

don't wanna hijack this thread further but a quick question on possible causes;

1)someone once replied to me on here that a ****ed dizzy bearing could snap belt from resistance.. how likely is this the case? coz the bearing sound did get worse and i didn't end up fixing it.

2)timing belt tensioner too tight??


next questions:
1) OEM Honda belt again
OR
2) "Performance" belt?

***EDIT***
don't worry benny i'll definitely be out next time you guys book a lane for some "WSID Stress Relief" after some more expenses on this :p

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Quote:

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Originally Posted by bennjamin

tensioner too tight/loose could prematurely snap belt
dizzy bearing - never heard of a seized one do this.mind you you can hear a bearing slowly die a long time before it probably seizes

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Originally Posted by fatboyz39

Badluck Ron.

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Quote:

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Originally Posted by bennjamin

ill be there recording slow 1/4s
if anyone wants some in car footage just ask you can borrow the camera and ill youtube it laters

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Quote:

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Originally Posted by dsp26

have fun gents scrap me off the list. timing belt snapped... asshole!! ggrrr hope nothing else broke

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Quote:

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Originally Posted by Benson

Ron, thats some bad luck man.. Hope it works out for you..

Did you change to a new belt when you did the new cams?

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Quote:

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Originally Posted by bennjamin

WTF

jeebus i hope you aint running a gatesor other aftermarket item.....Ron get it fixed asap and get out here !

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Quote:

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Originally Posted by dsp26

i was sooo gee'd for tomorrow dammit.

oem Honda belt brand new when my motor was put together.

don't wanna hijack this thread further but a quick question on possible causes;

1)someone once replied to me on here that a ****ed dizzy bearing could snap belt from resistance.. how likely is this the case? coz the bearing sound did get worse and i didn't end up fixing it.

2)timing belt tensioner too tight??


next questions:
1) OEM Honda belt again
OR
2) "Performance" belt?

***EDIT***
don't worry benny i'll definitely be out next time you guys book a lane for some "WSID Stress Relief" after some more expenses on this :p

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Quote:

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Originally Posted by bennjamin

tensioner too tight/loose could prematurely snap belt
dizzy bearing - never heard of a seized one do this.mind you you can hear a bearing slowly die a long time before it probably seizes

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Quote:

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Originally Posted by fatboyz39

Badluck Ron.

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Quote:

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Originally Posted by bennjamin

ill be there recording slow 1/4s
if anyone wants some in car footage just ask you can borrow the camera and ill youtube it laters

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Originally Posted by Limbo

dunno maybe go the toda belt or apexi belt?

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Originally Posted by delsol9000rpms

sorry to hear mann.. bad luck.... there irony in this though.. remember when i told you to get a performance belt for a peformance motor?? hopefully your valves are ok... maybe go toda or gates or is it worth trying the oem honda one again?

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Originally Posted by Benson

Nothing Beats OEM belt man. We use OEM belts only on our B16a and nothing is wrong. We even reuse second hand belts on our current b16a motor as it was the only belt that could be found before one of the supersprint rounds.

Gota make sure its tension properly and or ensure nothing can get into the timing belt area. A small rock can cause a belt to rip

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Quote:

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Originally Posted by delsol9000rpms

when you say nothing can beat oem belt...? does that mean youve tried other good branded timing belts and they have done a worse job then the honda one?

IMO
oem belt for oem motor
performance belt for performance motor for higher revs etc lets just say the toda timing belt was the best investment i made for my motor... but each to there own opinion

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yeah find it odd.. going back to workshop now to check for further damage.

delsol9000rpms.. lol i knew you were gonna say exactly that :p i've always thought the same thing.. oem with oem and performance with performance... but i've never disputed the quality of oem honda parts though... i guess i just made a bad investment in this case.

what gets me though was this happened in the following circumstances:
- 4th gear @ 8okm/h
- ~4krpm off-load and off-vtec
- happily cruising along

so it can't be an oem thing.. may have been a bad batch... soooo, gonna try oem again depending on if the heads damaged or not. if i do need to get some valves i'll be getting flat-faced and toda belt.


gonna open up the motor today, can you guys make me feel better and tell me my motor is fine... when it happened:
- no loud noises or mechanical sounds, engine just shut off and i clutched in ASAP
- tried cranking after i stopped... sounded really clean and no restriction --> no compression --> no clanking noises
- wasn't on load or vtec


what are the chances of my head being in tact?

this is such a damper.. i've had less problems with my sr20.... depending on how much this costs to repair i'll be leaving honda and follow in SHW7OY (Milads) footsteps and get a motorbike on the side :p

a del sol was a bad investment for track project to begin with... didn't realise it was 200Kg heavier than the Nissan NX i replaced with this and no torque :/

Different engine, but a TX3 I once owned snapped the timing belt and had exactly the same circumstances as yours. Had the exact same symptoms after it snapped as well. I had NO damage whatsover. So I'd say you may have escaped without too much drama.

Oh, and Milad's SR has a heap more in it if he wanted to. Remember, he is still using the OEM computer without any tuning. Its a good setup. :)

Quote:

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Originally Posted by grumpy rooster

Different engine, but a TX3 I once owned snapped the timing belt and had exactly the same circumstances as yours. Had the exact same symptoms after it snapped as well. I had NO damage whatsover. So I'd say you may have escaped without too much drama.

Oh, and Milad's SR has a heap more in it if he wanted to. Remember, he is still using the OEM computer without any tuning. Its a good setup. :)

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good to know:thumbsup: although i clutched in straight away.. i was WOT'ing it before i realised the engine stopped.. no issue?


took it around to Joe's an hour ago... i was on low lift plus he notched my pistons so i'm hoping therewas no interference as you said... hopefully can troubleshoot the cause though as i don't need this happening again halfway to qld for work trip lol. i'm going to guess Joe will be sourcing the oem belt off you?

i'm still paying off my wisdom teeth which prevented me from getting the neptune off you... sux $3500 bill with $1400 to go :( one day when all is sorted i guess sorry about the hassle btw...


I had pretty much the same plans as Milads except I ordered JWT C2s and cancelled them that week my NX was written off (and sold off all the parts on my floor (clutch, par flywheel, imported vlsd box + hydro setup).... i didn't realise however that compression was that big a key on the SR... theres a few people now with 110-120wkw+ and still don't pull the same times as him... plus Milad has consistent times by the looks of it... good driver:thumbsup: i too had close to 11:1CR though on stock cams pulling 98wkw.. was a VERY strong motor

ouchies dude bad luck

we've got a lude vtir with a broken cambelt in our workshop at the moment. damaged all the valves and well yeh it's not pretty :(

on the other hand i've seen two civics in the last year have belts snap on them and all they've been up for is a new belt :)

Quote:

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Originally Posted by dsp26

good to know:thumbsup: although i clutched in straight away.. i was WOT'ing it before i realised the engine stopped.. no issue?

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The engine would have stopped before you did that most probably. As soon as it snapped the shows all over, regardless of what you did.

Quote:

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Originally Posted by dsp26

took it around to Joe's an hour ago... i was on low lift plus he notched my pistons so i'm hoping therewas no interference as you said... hopefully can troubleshoot the cause though as i don't need this happening again halfway to qld for work trip lol. i'm going to guess Joe will be sourcing the oem belt off you?

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Not me. I don't get into that stuff. I don't know who he uses.

Quote:

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Originally Posted by dsp26

i'm still paying off my wisdom teeth which prevented me from getting the neptune off you... sux $3500 bill with $1400 to go :( one day when all is sorted i guess sorry about the hassle btw...

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Don't worry about it. These things happen. Nothing you can do about it.

Quote:

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Originally Posted by dsp26

I had pretty much the same plans as Milads except I ordered JWT C2s and cancelled them that week my NX was written off (and sold off all the parts on my floor (clutch, par flywheel, imported vlsd box + hydro setup).... i didn't realise however that compression was that big a key on the SR... theres a few people now with 110-120wkw+ and still don't pull the same times as him... plus Milad has consistent times by the looks of it... good driver:thumbsup: i too had close to 11:1CR though on stock cams pulling 98wkw.. was a VERY strong motor

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This is getting off topic a bit but his car is just a well matched set of parts. Most people try to go too big with the cams or don't go for enough compression. The lightweight flywheel helps a lot as well. Practise and a good combo is the key on any car. Now he just needs some gears to make it go consistently into the 13's. :)

You have more then likely bent some valves. Find the cause of the problem.

ye yur valves most likely are fukked... honda engine equals interference design.. plus yuve milled yur head and got bigger cam profiles......

who tensioned the timing belt? is that the cause of the problem?.... could it have been a faulty timing belt?

Quote:

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Originally Posted by fatboyz39

You have more then likely bent some valves. Find the cause of the problem.

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Jimmy's right,
It's unlikley the exhaust valves will all be straight.
Honda's often break the valve guides when they bend valves too.

Belts generally don't just snap for no apparent reason.
Carfully check everything.
It could be a dodgey tooth on a cam pulley or crank pulley.
It could be something wrong with the water pump...
But you you need to figure out why it happened as well as fix it.

Good luck with it,

Thanks blokes!

hopefully find out soon....

sad news though... i was hoping being on the low cam and having notched pistons would save me.

Adrian, quick question though.. you mentioned waterpump? in what way does it contribute to belt death?

anything with a damaged gear on it.
so cam, crank, water pump.