5th & 6th Generation (2002-2006 & 2007-2011)Toyota Camry Discussion for years: 2002-2006 & 2007-2011
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I have a 2008 4 cylinder Camy with 53k miles on it. The car runs great. Only issues that I have had was a replaced water pump at 48k.
For as long as I have had the car their has been a rapid ticking noise at 6500 rpm. It only does this for a half a second before the gears shift. It only does it at 6500 under load. If i do it while the car is in neutral it doesn't make the noise. I am not sure if this is the transmission or the engine. The performance is as good as it can be for a 4 cylinder. My mileage is superb (25 avg around town). The only pain with this car is that it uses more oil than I think a car should but I have heard this is common with these cars.
Please let me know if this is just normal (which I think it is). If you need me to check anything else let me know.
I know I'm an old fart but I've been driving for 55 years and the only time I went to red-line was on the track. Around town, or even on the highway, there's no need to red-line the engine (IMHO).
But, back to the question at hand, from the description, sounds like transmission not engine.
gator1939
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If it were the valves wouldn't it also make that noise when in neutral at the same rpm?
Nope. Valves (and their springs) have a limit to how fast they can open and close. At some point in the RPM range they begin to float (or not close completely) before the cam lobe comes around to open them again. The resulting gap causes a noise similar to what you describe but only at the upper end of the rev limit. This is not an indication of anything wrong in the valvetrain.
Like others have said. Redline is not something your engine is designed to do on a regular basis. It's there to point out the occasional upper RPM limit.
Nope. Valves (and their springs) have a limit to how fast they can open and close. At some point in the RPM range they begin to float (or not close completely) before the cam lobe comes around to open them again. The resulting gap causes a noise similar to what you describe but only at the upper end of the rev limit. This is not an indication of anything wrong in the valvetrain.
I understand valve float and what it is, but like you said it happens at a certain RPM. Since it is RPM based it should make that sound at that certain RPM regardless of whether the car is in gear or not. The OP said that they only hear the sound under a load, meaning they only hear it when the car is in gear at that RPM. They also stated that they do not hear the sound at that RPM when in Neutral. That being said, how can it be valve float?
I got you. I've only ever heard valve float on videos. I've never heard it in person and I only have slight book knowledge about it so that's why I asked that.
It's hard (with so little information here) to really make a good guess on many of these problems. I could be flat out wrong here, but going on the description that was what it sounds like to me. It could be something as simple as a heat shield rattling at a certain RPM. Hard to know for sure.
Thanks for the information guys. Would there be any more information I could give that could help diagnose this any more? As I said earlier the car drives great and doesn't make the noise unless in gear.
Thanks for the information guys. Would there be any more information I could give that could help diagnose this any more? As I said earlier the car drives great and doesn't make the noise unless in gear.
Ed
Smartest thing I think you can do at this point is let a good Toyota mechanic drive it (and go with him). That way you can get a good first hand expert opinion.
Think of the red line as the point where your engine begins to self destruct. If you don't rev it to that point, it won't fail, and you won't hear the noise you hear. Just don't do it and all will be well.
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Toyota engines have a rev limiter that cuts in very close to redline on most models. You may be just starting to nudge the limiter. Any car that I've experienced valve float in also starts missing and falling flat on its face as the valves bounce back open uncontrolled by the valve springs. Also, an engine that is run at high RPM's will use more oil than an engine that is driven moderately. Free revving an unstressed engine to redline is not condusive to engine longevity! I think your conditions are normal.
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