Toyota's legendary V8 has a problem
09-13-24 | 12:07 PM
#241
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Updated to still be lesser than any UR engine so your point was? That's like saying "I have the UPDATED AND NEWEST Toyota NA 4 cyl"......cool story bro, you are still missing 8 cylinders!
…it’s the same as it was in 2006. Where is the innovation? At least with the 2UZ it was updated mid cycle. (Even though the stuff they added is not cool in my books)
09-13-24 | 12:08 PM
#242
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09-13-24 | 12:29 PM
#244
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I should have been more clear. Toyota's documentation states that, but there are literally hundreds of cases of pre-VVT engines that have snapped their belts (often at highway speeds) and suffered no damage. Here's just one example:
https://www.youtube.com/watch?v=WLaGE4vSqHg
Every "forcible valve re-clearancing" failure I've ever heard of has been on a VVTi motor.
https://www.youtube.com/watch?v=WLaGE4vSqHg
Every "forcible valve re-clearancing" failure I've ever heard of has been on a VVTi motor.
They will fail on the 4.7. If you don't have it, how can it break?Are you saying the newer engines are better than the older Toyota engines?
Last edited by Toys4RJill; 09-13-24 at 12:46 PM.
09-13-24 | 12:46 PM
#246
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Nothing super complex---the valves change timing for more torque down low and freer revving up high.
2UZ wasn't interference until VVT was added.
09-13-24 | 12:51 PM
#248
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The very reason for HG failure vs not.
On VVTi so many people misunderstand what it is. There is no variable lift which means there is no reason for a VVTi engine to automatically become interference unless other components are changed like pistons, rods and potentially crankshaft.
On VVTi so many people misunderstand what it is. There is no variable lift which means there is no reason for a VVTi engine to automatically become interference unless other components are changed like pistons, rods and potentially crankshaft.
09-13-24 | 12:57 PM
#249
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09-13-24 | 12:59 PM
#250
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The very reason for HG failure vs not.
On VVTi so many people misunderstand what it is. There is no variable lift which means there is no reason for a VVTi engine to automatically become interference unless other components are changed like pistons, rods and potentially crankshaft.
On VVTi so many people misunderstand what it is. There is no variable lift which means there is no reason for a VVTi engine to automatically become interference unless other components are changed like pistons, rods and potentially crankshaft.
09-13-24 | 01:07 PM
#251
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09-13-24 | 01:07 PM
#252
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I have seen this video, I was a little surprised with that video. From what I understand, if the belt breaks a low RPM then there is a possibility of no damage, but if you are running at 4K or more than then there is damage.
For the exact reasons Striker says above They will fail on the 4.7. If you don't have it, how can it break?
Are you saying the newer engines are better than the older Toyota engines?
For the exact reasons Striker says above
They will fail on the 4.7. If you don't have it, how can it break?Are you saying the newer engines are better than the older Toyota engines?
09-13-24 | 01:09 PM
#253
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The very reason for HG failure vs not.
On VVTi so many people misunderstand what it is. There is no variable lift which means there is no reason for a VVTi engine to automatically become interference unless other components are changed like pistons, rods and potentially crankshaft.
On VVTi so many people misunderstand what it is. There is no variable lift which means there is no reason for a VVTi engine to automatically become interference unless other components are changed like pistons, rods and potentially crankshaft.
09-13-24 | 01:10 PM
#254
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09-13-24 | 01:52 PM
#255
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VTEC literally has a 3rd, more aggressive cam in between the 2 standard cam lobes that gets engaged... VTEC is either on or off
variable valve timing is well, variable lol... in the case of the corolla and matrix XRS with VVTL-i that really is more like VTEC where the cam profile suddenly switches at a certain RPM