HELP timing belt snapped on DOHC ZC

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Old Apr 8, 2007 | 09:52 AM
  #1  
nexgen91's Avatar
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Default HELP timing belt snapped on DOHC ZC

I was driving yesterday and my timing belt broke. I dont have the time to read through a bunch of post and I need specific answers for my questions. So dont hasle me about using search, I usually do.

Now onto the question, I was going about 45 mph, and was shifting into 3rd or 4th gear. All of a sudden I felt a loss of power, tach dropped to zero Im guessing, dont really remember. Didnt know what was going on. So I tried down shifting and pressing the gas still nothing so I coasted of the road and called my wife to come pick me up. I have been having main relay problems so I thought that might have been it, changed it and still no start. I tried the ECU, dizzy and checked for fuel/spark. Needless to say I cranked it over quite a few times. So my question is what is the likelyhood on this engine that the valves are bent? Thanks
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Old Apr 8, 2007 | 10:34 AM
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Default Re: HELP timing belt snapped on DOHC ZC (nexgen91)

likelyhood is you maybe have broken a valve/piston.. maybe
I have heard cases where no damage has happend.

Take the tappic cover off any put the engine at TDC and set both cams at TDC (never worked with a dohc yet ) and put a new belt on and then turn over the engine... see what happens.
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Old Apr 8, 2007 | 10:46 AM
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Default Re: HELP timing belt snapped on DOHC ZC (nexgen91)

There's a 50/50 chance of it being trashed.

Had a customers belt break about a month ago (230k miles on orig belt). It broke while driving. We replaced the belt and water pump and it was good as new.
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Old Apr 8, 2007 | 05:01 PM
  #4  
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Default Re: HELP timing belt snapped on DOHC ZC (Iccy)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Iccy &raquo;</TD></TR><TR><TD CLASS="quote">likelyhood is you maybe have broken a valve/piston.. maybe
I have heard cases where no damage has happend.

Take the tappic cover off</TD></TR></TABLE>

do you mean take off the valve cover??
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Old Apr 8, 2007 | 10:42 PM
  #5  
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Default Re: HELP timing belt snapped on DOHC ZC (nexgen91)

no first take off the tappit cover and install the new belt to turn over the whole engine.

then when u turn it over watch each set of valves to see it any are sticking or acting wired.

if that looks ok turn the engine over with the starter motor... just a quick shot dont start the engine.

if that looks/sounds ok try start it....
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Old Apr 9, 2007 | 12:21 AM
  #6  
nexgen91's Avatar
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Default Re: HELP timing belt snapped on DOHC ZC (Iccy)

ok so I take the valve cover off replace the belt and look to see if the valves are acting funny?
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Old Apr 9, 2007 | 12:58 AM
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Default Re: HELP timing belt snapped on DOHC ZC (nexgen91)

Sometimes it does destroy the motor, sometimes it doesn't. Like I said in the other recent T-belt thread, As far as I remember all honda motors are interference. You could have done some damage.

If It were my car, I would go buy a T-belt and water pump.....Set the timing, install the new belt and see what happens. Can't really hurt the bent/broken valves much more than they already are (assuming worst case scenerio).

Best case is that it starts right up.
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Old Apr 9, 2007 | 09:42 AM
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nexgen91's Avatar
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Default Re: HELP timing belt snapped on DOHC ZC (black88si)

if the valves are screwed, will it start up?? also would it have prob damaged the block/pistons? because I can get a head pretty cheap if not. thanks
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Old Apr 9, 2007 | 09:48 AM
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Default Re: HELP timing belt snapped on DOHC ZC (nexgen91)

if the valves are bent, they probably scored the pistons as well. The block is probably fine (unless a valve broke).

If the valves are really bent, your motor wont start.
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Old Apr 10, 2007 | 12:52 AM
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Default Re: HELP timing belt snapped on DOHC ZC (black88si)

so if it starts it will probly be ok, as long as the valves look ok while turning the crank?
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