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2004 Toyota v8 Timing Belt breaks at 65mph

Discussion in '1st Gen Tundras (2000-2006)' started by rhino89117, Nov 14, 2019.

  1. Nov 14, 2019 at 5:00 PM
    #31
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    Sounds fair. Who knows all the details except the previous owner? The mechanic can sort some of this internet ambiguity out. See my post #19.
     
    HappyGilmore[QUOTED] likes this.
  2. Nov 14, 2019 at 10:09 PM
    #32
    02goes

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    Last edited: Nov 14, 2019
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  3. Nov 15, 2019 at 4:52 AM
    #33
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    02goes[QUOTED] and FrenchToasty like this.
  4. Nov 15, 2019 at 12:21 PM
    #34
    Hooptytrix

    Hooptytrix Squeaky Chicken

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    195k miles is foreplay on these engines, it's not German or American.

    I had to say it, sorry.


    The hardest part of older vehicle ownership is finding a mechanic that knows what they are doing
     
  5. Nov 15, 2019 at 1:38 PM
    #35
    PCJ

    PCJ New Member

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    [QUOTE
    The hardest part of older vehicle ownership is finding a mechanic that knows what they are doing[/QUOTE]

    These vehicles aren't that old in respect to technology. Mechanics that know how to adjust a distributor with points and rebuild/adjuste carbs is hard to find.

    Yes, but as a general rule a timing chain last longer and doesn't break very often and doesn't require periodic replacement as does a timing belt so most people don't worry about those engines.
     
  6. Nov 15, 2019 at 1:51 PM
    #36
    Hooptytrix

    Hooptytrix Squeaky Chicken

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    These vehicles aren't that old in respect to technology. Mechanics that know how to adjust a distributor with points and rebuild/adjuste carbs is hard to find.



    Yes, but as a general rule a timing chain last longer and doesn't break very often and doesn't require periodic replacement as does a timing belt so most people don't worry about those engines.[/QUOTE]

    When I say older I should specify that I am talking about a vehicle out of warranty and most likely getting up there in mileage. I am not sure where you live but down here in Florida, finding a mechanic that knows what he is doing and isn't trying to pay his mortgage with every vehicle that rolls in is hard to find.

    I prefer timing chains over belts but there is an advantage to the belt. Since the belt has definitive life expectancy, we have to go in there and get some things done. Water pumps, seals and gaskets, belts etc all get done which leaves you with a vehicle that is ready to continue for next 90k. With a chain all of these things get overlooked or forgotten until something goes wrong.
     
  7. Nov 15, 2019 at 2:01 PM
    #37
    7.62Tundra

    7.62Tundra Chromeaphilliac

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    .[/QUOTE]



    I prefer timing chains over belts but there is an advantage to the belt. Since the belt has definitive life expectancy, we have to go in there and get some things done. Water pumps, seals and gaskets, belts etc all get done which leaves you with a vehicle that is ready to continue for next 90k. With a chain all of these things get overlooked or forgotten until something goes wrong.[/QUOTE]

    Dunno, I've always thought a belt was crazy, super especially in an interference engine. I did one a couple of years back in wife's RX330 and it sucked. Getting the cover bolts off that sideways son of a bitch and the damn near frozen bolt on the crank pulley pissed me off. Dealer had done a belt change and didn't use anti seize on the bolt or the washer contact surfaces on the last change. I hope to never own a vehicle that is front wheel drive or uses a timing belt. Wife had it before we got married.

    I got to moving the cams around and started wondering about whacking a valve and looked it up. Non interference.
     
    Last edited: Nov 15, 2019
    speedtre likes this.
  8. Nov 15, 2019 at 2:22 PM
    #38
    02goes

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    I was believing by some responses that they didn't understand the difference between an interference and non interference engine. Just because a motor uses a timing chain doesn't mean it's a non interference engine. And that's how I was reading some were taking it as.

    About timing chains, generally they will first stretch to the point of needing replacement, and if for some reason neglected it will jump teeth. If it's an interference motor the owner is still screwed.
    However, on the other hand, I remember the old push rod days where they would bend before it got serious.
     
    Last edited: Nov 15, 2019
  9. Nov 15, 2019 at 2:30 PM
    #39
    02goes

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    I would be too, Lol! knocking on wood
     
    Last edited: Nov 15, 2019
  10. Nov 15, 2019 at 3:10 PM
    #40
    Hooptytrix

    Hooptytrix Squeaky Chicken

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    I have done a few belts on fwd crars and it sucks donkey balls. I ain't doing it anymore, not even on my truck. I just paid the shop and stood clean. But my point is that since I had to do the timing belt I might as well go ahead and do the crank seal, cam seals, valve cover gaskets, thermostat and upper & lower radiator hoses. These things normally are forgotten until something is wrong and you're conveniently parked on the side of the highway
     
  11. Nov 15, 2019 at 3:22 PM
    #41
    7.62Tundra

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    Oh yeah, when you're there may as well. I started looking at the water pump and screwed up and didn't loosen the cam pulley bolts before taking off the belt and said screw that. It didn't get a water pump. I was already a week into all the work with ball joints, steering rack, CVs, struts, blah blah

    It's got 250K on it and needs oil pan gaskets. I had the luxury of having the front suspension off changing it out when I did the belt. I'm trying to talk her into getting a 4 runner with say 50K-80K. I'm not messing with it anymore unless it's just dead in the water.
     
  12. Nov 15, 2019 at 3:24 PM
    #42
    e30cabrio

    e30cabrio I'm e30cabrio, I'm a modaholic

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    Sorry this happened. My '94 80 series Land Cruiser had a head gasket failure of what I was a known defect at 174k. That is dead in many motors but just getting started on a Toyota.

    I rebuilt the head and did all the while you are in there stuff to the tune of 3k and she was good as new.
     
  13. Nov 15, 2019 at 3:24 PM
    #43
    Hooptytrix

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    I like the mid 00's 4Runners with the 4.7
     
  14. Nov 15, 2019 at 3:28 PM
    #44
    7.62Tundra

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    I liked the older ones. But she's driving a 2006 RX330. She needs to get something newer that I'm not going to have to screw with for awhile. Mid 10's.

    Albeit till she runs over some shit in the road.:rolleyes:
     
  15. Nov 15, 2019 at 3:32 PM
    #45
    Ajkkane

    Ajkkane Old fart.

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    I’ve been told many times that all toyotas are a clearance engine. Meaning if the T belt brakes it will not damage the engine. I believe there is a problem with the valve but it is not caused by the T belt breaking.
     
  16. Nov 15, 2019 at 4:01 PM
    #46
    Hooptytrix

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    Lol. My wife can be special sometimes and she just goes over shit then comes home to tell me her car is making noise. Well yeah, you have a tree branch stuck in the grill, you ran over 2 potholes and found a few ducks on your way home.


    Not all Toyotas, we can say that the 4.7 is definitely an interference engine
     
    bmf4069 and 7.62Tundra[QUOTED] like this.
  17. Nov 16, 2019 at 5:57 AM
    #47
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    Nope, you were misinformed. Google "Toyota interference engines". There are more free-wheeling (non-interference) Toyota engines than I would have thought, since non-interference sacrifices efficiency for engine safety. Up through 4.7L, looks like it splits about 50/50.

    Edit: http://yourcarangel.com/2014/07/interference-engines-complete-list/

    As one site wrote, the best policy is to ASSUME your engine IS an interference engine until you can confirm from reputable, reliable sources that it is a free-wheeling or non-interference engine.
     
    Last edited: Nov 16, 2019
  18. Nov 16, 2019 at 5:59 AM
    #48
    rhino89117

    rhino89117 [OP] New Member

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    Bore scope wi reveal the truth
     
  19. Nov 16, 2019 at 6:04 AM
    #49
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    Internet has exaggerated for 1st Gen Tundras:

    1) Blown timing belt breaking problems.

    2) The Pink Milkshake problems.

    3) The repair of soft brake pedal.

    I have 15 years of internet reading to back this up.
     
  20. Nov 17, 2019 at 12:11 AM
    #50
    empty_lord

    empty_lord They see me rollin'

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    3uz is also a belt. All uz family engines are. The ur series is a chain.

    As for the op if your belt snapped and took out valves it’s very rare for one cylinder to be affected. It usually ends In most cylinder having broken valves. But valve strikes are easy to spot with a bore scope. Best attack method is to get a leak down tester and leak down rear cylinder 4 first and see what she’s reading

    After of course looking down the hole with a bore scope. Typically if the valves hit the ones I’ve had at work the valve is sitting in the combustion chamber broken off the stem.
     

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