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Old 01-27-2021, 01:32 AM #1
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Engine ticking noise, driver side, rear
Was changing the coolant when I heard this ticking noise. Not sure if it was there before, just happened to notice it now since I had the hood open while the engine was running.

The ticking sound is coming from the back of the engine, driver side.
Video

Give it to me straight doc, how long do I've got?
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Old 01-27-2021, 11:15 AM #2
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Quote:
Originally Posted by ad_robotics View Post
Was changing the coolant when I heard this ticking noise. Not sure if it was there before, just happened to notice it now since I had the hood open while the engine was running.

The ticking sound is coming from the back of the engine, driver side.
Video

Give it to me straight doc, how long do I've got?
My 2008 V6 has always had a tick since I bought it with 35k miles on it. Always assumed it was just the norm for these engines and haven't thought twice about it in the last 100k miles.

That said, have you changed motor oil brand/viscosity lately? How many miles on your oil now? Could also be an exhaust manifold but that issue isn't nearly as prevalent as on the v8s.
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Old 01-27-2021, 03:13 PM #3
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I've done regular maintenance and did change the oil brand but since 2 oil changes ago.
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Old 01-27-2021, 05:04 PM #4
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I too have the common driver side ticking, but it's not nearly as loud as yours. About a year ago, I met a dude who claimed to be a master mechanic at a Toyota dealer and I asked him about it. He said that it's unlikely to be a lifter, even though it sounds just like one. He told me that's it's almost always a noisy injector, but it's not a sign of impending injector failure.

The only way to test that theory is to plug in a sophisticated diagnostic tool that would allow me to deactivate individual fuel injectors. Do you have access to something like that?
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Old 01-27-2021, 06:13 PM #5
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Possibly a cracked exaust manifold. It's a common problem on 4runners.
Mines been doing it on the passenger side for the past 60k+ miles but stays silent once the outside temps go below 60 degrees or so. I'm not going to bother replacing it until it starts throwing codes.
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Old 01-27-2021, 06:33 PM #6
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Did you check your plugs yet?
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