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Toyota Cold Engine Ping



  • I am having the exact same problem with my 01 Rav4....only under load when cold....gone when warm....started this past winter....tried a little quieter at last oil change....not too bad right now using 93 octane gas...but I still hear it.....Rav4 also has timing chain....I am in Florida.....wonder if we're getting ripped off on the gas.....strange that we are seeing this problem in different engines and models of cars........
  • Mr_ShiftrightMr_Shiftright Sonoma, CaliforniaPosts: 58,488
    You might try switching the synthetic oil if you are getting a little valve noise when cold. I really don't think a little valve tapping when cold is anything to worry about as long as it goes away or diminishes when warm. Like I said, it's the valves you DON'T hear that you often have to worry about.

    Of course, if your camshaft is being hammered, this is something serious, but you'd hear a very sharp and constant noise in that case, a lot more than a soft light tapping.

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  • sgrd0qsgrd0q Posts: 398
    The synthetic oil advice is good, but may not solve the problem. I've always used Mobil 1 synthetic, and I get the noise (2001 Maxima.)

    I agree with Mr Shiftright - as long as the noise disappears (it does in my case) once the engine has warmed up - this shouldn't really be much of a concern. Still puzzling though. I'll try an injector cleaner fuel additive next.
  • dq1dq1 Posts: 44
    I got my '01 Celica back from the dealership today with the Southeast Toyota Dealer having spent time trying to diagnose my problem. Toyota's bottom line is that this is pre-ignition spark knock. Cold engine temp is the major factor in determining how loud the noise is. Once the computer detects the problem, it compensates the timing to get rid of the problem. No one could answer the question "Why hasn't this occurred during the past two winters?" I think the service manager through me a bone by saying maybe the plugs needed to be changed. I pointed out that these are iridium plugs that his parts manager said should be good for 120k miles. Then he agreed to replace them under warranty.

    I can't believe these new plugs cost $17 each!!! This new technology is such an improvement, lol. I'll post again after a few days with an update on whether or not this helped.

    Also, totally off topic, I called Goodyear tire today to see how their prices compared to, and the manager agreed to give me Tire Rack's price plus shipping. Not bad, but just goes to show that tire shops can be negotiated with on price if your educated on their competitors.
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