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what are the odds

 
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Old 07-17-2010, 02:53 AM
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what are the odds

back in january my timing belt snapped while doing 70 on the highway...

what are the odds that it will turn back on if i just replace the belt and everything might be ok besides the fact that ive read thousands of times that the interferance engines become garbage
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Old 07-17-2010, 03:14 AM
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Re: what are the odds

*broken link

ok because all i have left to do is tension the timing belt balance belt but like the manual states you need a screw to do this?

is this step crucial or should i just tension the belt myself and finish up
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Old 07-17-2010, 03:58 PM
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Re: what are the odds

what motor do you have?

and if you were going 70 you have bent valves
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Old 07-17-2010, 07:03 PM
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Re: what are the odds

I've popped the timing belt twice on my motor and it still works :)
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Old 07-18-2010, 03:40 AM
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Re: what are the odds

h22a1,,

^Lindso,, how fast were you going what conditions lol?,, and how did it happen twice



going 70, soon as i felt it turn off i put it in neutral almost without thinking,,

i finished up im just not sure about that balance belt or about adjusting it with a 6*10mm bolt i believe the manual said,,,, ive seen ludes without the balance belt so shuld i adjust it????


...with bent valves would it still turn on???????
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Old 07-18-2010, 12:00 PM
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Re: what are the odds

if your reaction time (not talking about 1/4 miles racing here, hehehee ) was VERY very fast and you shut her off almost immediately when you noticed it, you mightttt have a fighting chance that your motor is ok.


yes you NEEEEEDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD to tension the belt!!!!!!!!! just imagine if there's any slack in the belt what-so-ever, the first time you crank it over its immediately gonna skip teeth.
what screw you talking about? all you gotta do is loosen the adjusting bolt slightly, rotate motor a lil bit by hand, tighten adjusting bolt. or something like that.
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Old 07-18-2010, 01:09 PM
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Re: what are the odds

First timing belt was in my Xterra (Also an interference motor) on the freeway. I probably spent about 5 hours trying to restart it before someone told me to knock it off. Compression was still okay on that one, it still runs perfectly.

2x on the Prelude - once on the freeway, then again 1/4 mile after I fixed it because the autotensioner wasn't holding properly. I switched to the H23 manual tensioner and it, too, still works perfectly.
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Old 07-18-2010, 01:25 PM
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Re: what are the odds

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Originally Posted by twign209 View Post
going 70, soon as i felt it turn off i put it in neutral almost without thinking
That's the trick -- if you shut it off and took it out of gear immediately (or sooner!), there's a chance. BTDT, and was very lucky. If the valve's bent slightly, but still sealing well enough to make compression, it may start, but it won't run as well, and you're risking damage to the head due to the valve not seating properly, or the whole engine becuase the overstressed part will eventually fail. Replacing a few -- or all -- of the valves is small change compared to lunching the engine.
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Old 07-19-2010, 01:08 AM
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Re: what are the odds

http://img836.imageshack.us/img836/1...082avitrim.mp4


Very short vid due to memory on camera and added caution.....plan to take a better vid next weekend maybe...stumbled a bit and then normalized warmed up normal and I turned it off.



----------------

^About the tension on the belt i was talking about the balance belt not the timing belt itself....

I also just did the h23 manual tensioner conversion for the added safety, I figured that if the engine didnít turn on I could use it on the next engine

As for immediately taking it out of gear, I recall I had my foot slightly rested on the clutch pedal and i slammed it in and put it in neutral.....all happened so fast tho...lol but I do remember that when i felt it shut off I didnít just sit there and think what to do

----------------

Since i just returned the alternator & a/c belts, crank pulley + belts and bolt(was thinking it was not going to turn on). Its with out the lower & upper cover + power steering thatís what I plan to do next and then test drive it.....or should I just wait and change all valves to drive it?

btw thanks for all the help guys
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Old 07-19-2010, 02:01 AM
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Re: what are the odds

Put the new belts on and do a compression test. And that should tell you if you have any bent valves or not.
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Old 07-20-2010, 08:37 PM
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Re: what are the odds

I found a compression gauge, looks like it works

but would it be a compression test or leak test?
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