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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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Old 01-27-2021, 09:40 PM #7
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Quote:
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Did you check your plugs yet?
Could be a plug backing out or arcing from a bad plug or coil

Sounds like an exhaust leak, and that is a sucky job to do. Had that on a nissan pathfinder and in the process of replacing the gasket, I snapped one of the studs. $900 later at the shop to drill it out. I hated that truck almost from the minute I bought it.
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Old 01-28-2021, 02:42 AM #8
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- I did replace my spark plugs a few months ago. I'll check and see if something happened with one of them.

- Would the exhaust manifold do a clicking sound? I'll check some videos online about exhaust manifolds and see if it is the culprit.

- I don't have access to one of those diagnostic tools
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Old 01-28-2021, 03:06 AM #9
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Looking at some videos it does sound like the exhaust manifold is cracked. Funny how I thought some mechanical part must be broken but seems like the internal clicking sound of the engine just comes out louder if the manifold has a crack in it.
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Old 01-28-2021, 09:30 AM #10
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Its your exhaust. Take it in to a muffler shop and have them diagnose it for free. When I bought my 08 V6 @98k the drivers side had already been replaced with a custom header. FF a couple years, one of the welds at the manifold cracked and produced the same sounds.. Replaced both sides with JBA shorties and haven't heard a peep since.
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Old 01-28-2021, 05:29 PM #11
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I agree with the exhaust leak theories. Does it quite/go away when the engine is fully warmed up?
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Old 01-28-2021, 05:40 PM #12
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I was able to reduce the ticking coming from my v6 by following this - but it's still there.

V6 Tick Tic Tap Noise Reduced!
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