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2000 Toyota Tundra
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3 Posts
Discussion Starter #1
Hello Toyota Nation.
My almost 20 year old Tundra 4.7 failed today. It started normally but idled a bit wierd then shut down and failed to re-start during cranking. I could hear that the compression wasn't normal when it turned over. A random misfire and camshaft sensor code came up. After referring to a dealership it was determined that the timing belt failed by opening the passenger side cover just in front of the valve cover.
My main concern all along was the rubber timing belt which was changed twice before at 95 then again at 210 thousand kms. I currently have about 280 thousand on the old truck.
I'm curious if any other owners had a similiar type of timing belt failure and if it caused damages to pistons or valves? I want to fix this but my dilemma...is it worth it if there is further damage to cylinder and head parts.
Thanks for any reply.
 

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1995 T100 2WD
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3,077 Posts
I believe that's considered a interference motor. I've seen pics of belts that broke with 50k miles on them and others that were fine with well over 100k on them. That being said you won't know the type or amount of any damage until you take it apart. You might want to try a borescope 1st to get a general idea, but the best way is to pop the heads off. It really doesn't have that many miles on it. I guess it comes down to the condition of the rest of the truck. No need to put a fresh engine in a tired shipping crate :(
 

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2000 Toyota Tundra
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Discussion Starter #3
Thanks sdspeed , I was hopeful since i had almost no wear or cracks the first 2 timing belt jobs that it would hold out to another 100K. Great idea, I will look into this tool before moving forward.
 

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1995 T100 2WD
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Might consider something like this, lots to pic from cheap. Some parts stores still have units they rent or loan out. Ya just need to see the condition of the piston and if possible the cylinder wall.
Some guys on the Corvette forum were able to twist ones like this around and get a glimse of the valves. Late model corvettes had a bad habit of dropping valves for fun,UGH!
 

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unfortunately there are wear and tear cracks that we can't detect right away. We don't look under the hood once an hour. Cracks can appear suddenly on a run like yours.
 
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