NX - 1st Gen (2015-2021)

Tech Question: ticking from top of I-4 turbo motor

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Old 09-02-20 | 09:52 AM
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Default Tech Question: ticking from top of I-4 turbo motor

So we bought our '16 used with 19k miles 2 weeks ago. Smooth, runs great. We had an appointment with our classic car at a mechanic friend's shop Monday night (he's a licensed Subaru master mechanic). Anyway, he comes over to see the new vehicle, my wife's sitting in the running car as I was just dropping off the musclecar. He pops the hood, and the engine is ticking loudly. "Wow, that's loud, even for injectors", he says. He recommended we take it to the local Lexus service to listen and say if its normal for this engine or not before the warranty expires on the used vehicle. I'm taking it to Lexus tomorrow afternoon.

Is there a Lexus service tech on this board? Is it normal for this engine to tick? Runs smooth, extremely quiet (with the hood down ), doesn't smoke. The oil has been changed 3x in its life per the service records.
Old 09-02-20 | 12:53 PM
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I checked out my NX200t and GS200t. Both have a similar clicking sound, probably injectors, maybe an aux air pump or just the valve train. I can't hear much with the hood closed but its a decent volume once the hood is open.

My last car was a pushrod cammed hemi V8 so these engines are delightfully quiet in comparison.

Can you post a video? Maybe a dumb question but is it low on oil?
Old 09-02-20 | 01:58 PM
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The NX200t car (engine) replaces a Cadillac (V6 turbo). My car is a BMW (I-6 turbo).

Crankcase is nice and full of clean oil (good question!)

I'll post what the dealership service advisor tells me.

Old 09-02-20 | 02:07 PM
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Originally Posted by rtman

I'll post what the dealership service advisor tells me.
I'll save you some time: If its under warranty, its fine. If its not under warranty, you need a new X, Y and Z.

I am assuming the engine cover is on there? I had mine off to change the plugs the other day and noticed it had what looked like sound absorbing foam. I'm sure the volume would increase a bit with that removed.
Old 09-03-20 | 02:35 PM
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Just got back from the Lexus dealership. Service person met me, we fired up the car, popped the hood, he listened, said it sounded normal to him, the sound of the direct injection system. We then went over to another NX in the service area (not an h car), started it up, let it sit for 3-4 minutes. Popped the hood, same ticking from the engine.

Mystery solved . And it was complimentary! Cheap peace of mind.

Glad to be with you, Lexus.
Old 09-03-20 | 04:37 PM
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Originally Posted by rtman
Just got back from the Lexus dealership. Service person met me, we fired up the car, popped the hood, he listened, said it sounded normal to him, the sound of the direct injection system. We then went over to another NX in the service area (not an h car), started it up, let it sit for 3-4 minutes. Popped the hood, same ticking from the engine.

Mystery solved . And it was complimentary! Cheap peace of mind.

Glad to be with you, Lexus.
I have worked at 2 dealerships. Chrysler and Acura. Word of caution; never trust a service advisor, they are not trained to do more than write down your complaint.

ask for a mechanic, or at minimum, the service manager. And assuming you have warranty, have the visit documented.


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