Lose your timing belt, lose your engine

Discussion in 'General Motoring' started by George Orwell, Apr 4, 2007.

  1. Watch out! Many Japanese products use timing belts with non-free running
    (interference) engines. When, not if, the belt skips or breaks, your
    engine and $8,000 is gone. Even if you get through the warranty period,
    the resale takes a big hit because the word has got around.

    Auto makers, heed this warning. The public knows gear, shaft, or chain
    driven single or double OHC engines are are safe design. Timing belt driven
    setups are not.

    Suzuki is an exception. Their cars are okay.
    George Orwell, Apr 4, 2007
  2. George Orwell

    Jeff Guest

    Really? Japanese cars still have high resale values compared to their
    American competitors.
    Really, now? Most members of the general public don't even know what a
    timing belt is.
    Yeah, like you know.

    Jeff, Apr 4, 2007
  3. George Orwell

    frederick Guest

    Like it's not trolling to multiple post this in honda, toyota, nissan
    Kind of like the number of post mid 90's model 4 cyl. Nissans offered
    for sale on web auctions here, where the owners claim that the timing
    belt has just been replaced...
    frederick, Apr 4, 2007
  4. Since when does a DOHC engine HAVE be a non-interferance design? Also since
    when does a timing chain solve the "problems" with belts? Ever heard of
    timing chain chatter?

    Stewart DIBBS, Apr 5, 2007
  5. George Orwell

    MAT Guest

    What happens with a stretched or broken timing chain? I have 110k miles on
    2002 K20A3 and I had belted Honda before this. Still runs great and I guess
    it was kinda cool I didn't have to do or pay for the timing belt service.
    What's the downside and eventual maintenance of timing chain?
    MAT, Apr 5, 2007
  6. First the chain wears ie gets slightly longer, and the cam + drive gear
    teeth get worn as well. The chain starts to chatter, and the valve timing
    goes off a bit. Timing chains seldom if ever break unless the lubrication
    system fails, at which point the chain gets REALLY noisy. If left long
    enough, the lubrication failure may affect the cam bearings or even main or
    big ends. I've never seen a chain break on the old BMC A and B series, Ford
    Cortina 1500/1600 engines and an E-type Jag engine I worked on years ago.
    Just about everything else let go, but not the chain ...

    An severely overreved engine would sometimes stretch the chain and throw the
    valve timing really off.

    Stewart DIBBS, Apr 5, 2007
  7. George Orwell

    Moe Guest

    6 of one, 1/2 dozen of the other. I've had a timing gear fail, I've
    had chains fail, I've had timing belts fail. I kinda prefer the
    timing belts all in all, quieter, better valve timing. I've never seen
    a chevy V8 that didn't have a lot of slack in the timing chain after 80K
    Moe, Apr 5, 2007
  8. George Orwell

    jim beam Guest

    jim beam, Apr 5, 2007
  9. George Orwell

    jim beam Guest

    #1 problem is chain stretch - that leads to cam timing issues and noise.
    belts are quiet, highly reliable within their stated mileage limit,
    and don't stretch. long term, you'll get more out of a well maintained
    belted engine than what is basically supposed to be an unmaintained
    chain engine.
    jim beam, Apr 5, 2007

  10. Almost all the Toyota DOHC engines are Non-Interference. Most Toyotas now
    have DOHC engines, and I believe they are all chains now.
    Hachiroku ハチロク, Apr 5, 2007
  11. Huh? So you replace the engine. That ruins the rest of the car?
    Word has gotten around about what? Most Japanese Import cars out values
    their Big3 counterparts by THOUSANDS of dollars for similar model type and
    Lets us know when you pull your head out of your ass. A lot of single OHC
    engines are interference, Japanese or American. My Chrysler LHS 3.5l was
    an interference engine.

    Come back when you actually know something...

    (we'll never see this one again...)
    Hachiroku ハチロク, Apr 5, 2007
  12. Newer timing chains appear to be much improved. Several people in the Prius
    forums I frequent are right around 200K miles and have not had timing chain
    problems. There is no schedule for changing the chain, either. Disclaimer -
    not enough data for a positive answer yet.

    Michael Pardee, Apr 5, 2007
  13. George Orwell

    jim beam Guest

    well, chains work, but belts are a better technical solution.
    particularly for high performance engines - less momentum and angular
    velocity fluctuation.

    don't forget, design criteria these days are all about life limitation
    and cheapness - chain wins on both counts.
    jim beam, Apr 5, 2007

  14. I prefer gears. My 1964 Studebaker P/U 289 has over 300K and the timing
    is fine...

    Grumpy AuContraire, Apr 5, 2007
  15. George Orwell

    codifus Guest

    I guess it comes to how well built the motor is, belt or chain. Fact
    is, Nissan VQ V6es are legendary, reliable timing chain motors. They
    just don't die. Even the SR20s, KA24s and GAs seem to hold up quite
    well. All timing chain motors. Honda and Toyota make great, long
    lasting timing belt motors.

    codifus, Apr 5, 2007
  16. George Orwell

    Coyoteboy Guest

    IIRC most toyotas are non-interference. It has nothing to do with being
    single or double cam.

    Hows about maintaining your car properly, therefore never having that
    Coyoteboy, Apr 5, 2007
  17. A lot ot the SOHC Toyotas are interference.

    But what Dimwit pays no attention to at all is the Maintenance Schedule in
    that often overlooked little piece of information called the Owner's

    If you change your belt when it says, you'll not have any trouble. I
    overlooked this in my Corolla GTS, but being a DOHC it's Non-Interference.
    The manual says 60,000; I had two belts go 120,000. I was lucky...
    Hachiroku ハチロク, Apr 5, 2007
  18. I had a 1970 Volvo with timing gears. One day I was driving home from work
    and heard the unmistakable sound of a bad rod knock. I towed the car home
    and lifted the engine to drop the pan, then found... nothing. Huh. Pulling
    the crank through I heard the "bang" as plainly as I heard it while driving.
    Double huh. It seemed to be coming from under the timing cover. There I
    found the cam gear's fiber outer ring had separated from the steel core, and
    was lifting up and dropping every revolution... bang!

    Michael Pardee, Apr 5, 2007
  19. Probably just a little. You were taking a risk, though. The
    recommended interval is intended to avoid 99+% of failures. The
    failure rate after 120K might only be 20%.

    OTOH, I know a guy who had one of those turbo Mitsubishi awd sports
    cars that were sold under the (Chrysler) Eagle brand back in the 90's.
    He went over the 45K recommended interval by about 1000 miles and the
    belt broke and trashed the engine. He fixed it and swore he would
    never miss another change interval. The next belt broke at 44K. Moral
    of the story: stick to Honda and Toyota.
    Gordon McGrew, Apr 5, 2007
  20. Mitsu's are notorious for throwing belts!

    And, if I were your friend, I would think about a 40,000 mile interval!!!
    Hachiroku ハチロク, Apr 5, 2007
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