my crank bolt fell out!
01-10-2005, 03:26 PM
#1
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my crank bolt fell out!
I was on my way home from work, getting ready to turn into the driveway, and all h$ll broke loose. all the dash lights lit up, so i turned down the radio and heard a horrible noise. I shut it down and coasted into the driveway to check the damage. the crank bolt had come all the way out and was sitting on the skid plate. the pulleys had backed out to the point of hitting the fan blades. im sorta releived because it sounded like a rod knock from inside the truck, but...
i'm not real familliar with yota engines. is there a keyway cast into the crankshaft that may have been damaged by this event? does anyone know where i can find a blow-up pic of the crank and pulleys?
i wont be able to tear this thing apart for a day or so, and im a little nervous about it.
i'm not real familliar with yota engines. is there a keyway cast into the crankshaft that may have been damaged by this event? does anyone know where i can find a blow-up pic of the crank and pulleys?
i wont be able to tear this thing apart for a day or so, and im a little nervous about it.
01-10-2005, 03:53 PM
#4
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Hard to say what damage may have been done. You very well could have damaged your radiator also. If it were me, I would pull the radiator/shroud and take the pully off so you can get a good look at everythin. Check to make sure the treads aren't torn up on the crank bolt. When you put the bolt back in, it's a good idea to use a torque wrench but I remember it beeing just a shade under my max strength to torqu it to spec. Might use some red thread lock this time around too.
01-10-2005, 05:52 PM
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this exact thing happen to me and me and my dad ordered a new bolt from the dealership for like 8 bucks and then used thread lock and a big freakin lead pipe and torqued it back in really tight and this happened about a year and a half ago and it has never givin me anymore trouble. just let the thread lock dry over night.
01-10-2005, 05:52 PM
#6
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Originally Posted by bike4miles
Hard to say what damage may have been done. You very well could have damaged your radiator also. If it were me, I would pull the radiator/shroud and take the pully off so you can get a good look at everythin. Check to make sure the treads aren't torn up on the crank bolt. When you put the bolt back in, it's a good idea to use a torque wrench but I remember it beeing just a shade under my max strength to torqu it to spec. Might use some red thread lock this time around too.
01-10-2005, 05:54 PM
#7
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Originally Posted by 884runner
this exact thing happen to me and me and my dad ordered a new bolt from the dealership for like 8 bucks and then used thread lock and a big freakin lead pipe and torqued it back in really tight and this happened about a year and a half ago and it has never givin me anymore trouble. just let the thread lock dry over night.
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01-11-2005, 02:22 PM
#9
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well, i got er' tore down tonight.
the balancer is junk...
the timing cover is junk...
the crankshaft is junk.
I also found out today that this is a fairly common problem on yotas, and it also happened to my buddys taco with the 3.4, but he got buy with a new balancer.
the balancer is junk...
the timing cover is junk...
the crankshaft is junk.
I also found out today that this is a fairly common problem on yotas, and it also happened to my buddys taco with the 3.4, but he got buy with a new balancer.
01-11-2005, 03:15 PM
#11
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the crank bolt falling out?? That is not a factory problem that I've ever heard about. Maybe your mechanic wasn't paying attention and didn't retorque that bolt down properly and didn't use blue locktite...
I've heard of that happening when other people did their own timing belt and then didnt retorque it back down properly with blue locktite. And those stories are what prompted me to REALLY bear down on the breaker bar and use a lot of lock tite...
I've heard of that happening when other people did their own timing belt and then didnt retorque it back down properly with blue locktite. And those stories are what prompted me to REALLY bear down on the breaker bar and use a lot of lock tite...
01-11-2005, 03:53 PM
#12
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Originally Posted by Bumpin' Yota
the crank bolt falling out?? That is not a factory problem that I've ever heard about. Maybe your mechanic wasn't paying attention and didn't retorque that bolt down properly and didn't use blue locktite...
I've heard of that happening when other people did their own timing belt and then didnt retorque it back down properly with blue locktite. And those stories are what prompted me to REALLY bear down on the breaker bar and use a lot of lock tite...
I've heard of that happening when other people did their own timing belt and then didnt retorque it back down properly with blue locktite. And those stories are what prompted me to REALLY bear down on the breaker bar and use a lot of lock tite...
on a side note... out of all the chevy and ford small blocks that I've installed harmonic balancers on, I cant remember ever using locktite, and I've nerer had one back out on me.
Last edited by 3car; 01-11-2005 at 03:55 PM.
01-11-2005, 03:57 PM
#13
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Originally Posted by 3car
I dont know if it was a factory problem or not. all I do know after talking to a couple guys at work is that there have been several toyotas towed in with the same problem, and my buddys was a 98 taco that had not had the timing belt changed yet.
on a side note... out of all the chevy and ford small blocks that I've installed harmonic balancers on, I cant remember ever using locktite, and I've nerer had one back out on me.
on a side note... out of all the chevy and ford small blocks that I've installed harmonic balancers on, I cant remember ever using locktite, and I've nerer had one back out on me.
01-11-2005, 04:08 PM
#15
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Originally Posted by superjoe83
the GM and ford balancers are a press fit, GM didn't even drill the cranks for a bolt on the early small blocks
01-11-2005, 09:45 PM
#18
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This isn't just a Toyota problem, it's a motor problem. Any crank bolt will fall out if it isn't tightened properly. It has the highest torque speck of any bolt on a car as far as I know. Screw that blue lock tight, go red all the way!!!
01-12-2005, 07:55 AM
#19
Registered User
Your problem is the nut behind the wrench.
Whoever worked on it last didn't tighten it properly.
the ˟˟˟˟ doesn't just 'fall off'
some bonehead didn't tighten it, and you don't need loctite (not that it'll hurt anything if you use just a little.)
Whoever worked on it last didn't tighten it properly.
the ˟˟˟˟ doesn't just 'fall off'
some bonehead didn't tighten it, and you don't need loctite (not that it'll hurt anything if you use just a little.)
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