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Discussion Starter #1
When the truck is idling there is a constant "ticking" sound that (based on research) is either the injectors, or some type of piston/valve slap. Heck, it might not be any of those and may be something on the belt clicking as it spins...It's not too loud, but I just hate hearing it. I don't thing it is a mechanical malfunction as the truck runs great from what I can tell.

Anyways, I want to try and figure out what is causing the noise, and hopefully make it stop so the truck idles nicer. Any guidance is appreciated. I dumped a bottle of Lucas Upper Cylinder Lubricant / Fuel Injector Cleaner in it when I filled up earlier, not that I am expecting a miracle or anything though...

There also seems to be a roaring wind noise when the RPMs increase. I am thinking my fan clutch might be bad causing it to spin with the RPMs. I'm going to watch the fan at idle tonight and see if it disengages at all.
 

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When the truck is idling there is a constant "ticking" sound that (based on research) is either the injectors, or some type of piston/valve slap. Heck, it might not be any of those and may be something on the belt clicking as it spins...It's not too loud, but I just hate hearing it. I don't thing it is a mechanical malfunction as the truck runs great from what I can tell.

Anyways, I want to try and figure out what is causing the noise, and hopefully make it stop so the truck idles nicer. Any guidance is appreciated. I dumped a bottle of Lucas Upper Cylinder Lubricant / Fuel Injector Cleaner in it when I filled up earlier, not that I am expecting a miracle or anything though...

There also seems to be a roaring wind noise when the RPMs increase. I am thinking my fan clutch might be bad causing it to spin with the RPMs. I'm going to watch the fan at idle tonight and see if it disengages at all.
If your's is bad, then mine is bad, I have the same thing on my 2017 V6 Frontier. I have 12,500 miles on mine now and it has quited down some, or I have gotten use to the noise.
 

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I've noticed my engine makes more noise at idle with the AC on than without. Sounds almost (but not quite) like a diesel engine when it idles. When the AC compressor kicks off, then the diesel sound goes away.

As for the fan, when the air is on, mine also makes more noise, as it should be doing when the revs go up. With the AC on, the fan must pass more air over the condenser. Try turning off the AC and see if it still roars. Mine doesn't once I've kicked it off.
 

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Mine does the diesel sound as well when its idling.... I kinda like it tho =D I have a '16 pro4x 7k miles
 

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Discussion Starter #5
I've noticed my engine makes more noise at idle with the AC on than without. Sounds almost (but not quite) like a diesel engine when it idles. When the AC compressor kicks off, then the diesel sound goes away.

As for the fan, when the air is on, mine also makes more noise, as it should be doing when the revs go up. With the AC on, the fan must pass more air over the condenser. Try turning off the AC and see if it still roars. Mine doesn't once I've kicked it off.
That was my first thought. It still makes the clicking when the AC is completely off :serious:
 

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There also seems to be a roaring wind noise when the RPMs increase. I am thinking my fan clutch might be bad causing it to spin with the RPMs.
IME, the fan clutch only engages in extreme circumstances (towing a heavy load, off-roading, etc.).

I've never had mine engage during normal driving - even in 110 degree weather.

If you've got a lot of miles on your radiator, it's possible that it is no longer doing an adequate job of cooling - in which case the fan clutch might be engaging to compensate for it.
 

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I had the same thing on my Dodge known as "Hemi tick". It was discovered that using a high quality oil with a high Moly count helped a lot. Redline oil was what was recommended.
 

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I had this ticking noise at idle. Drove me crazy. Dealer could not find it. I finally found it a couple months after I bought mine new last year. The sound comes from a fuel line that resonated the injector mouse into the cabin. I followed the line back passenger side under GE hood then it goes under the steering column. If you get under the truck and look up you will see a bracket pushing the line against the cabs floor board. If you take the two nuts off the noise will go away. I had a write up on here i will try and find.

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V6 Interior engine Noise Help on new frontier 4.0l

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Discussion Starter #10
I had this ticking noise at idle. Drove me crazy. Dealer could not find it. I finally found it a couple months after I bought mine new last year. The sound comes from a fuel line that resonated the injector mouse into the cabin. I followed the line back passenger side under GE hood then it goes under the steering column. If you get under the truck and look up you will see a bracket pushing the line against the cabs floor board. If you take the two nuts off the noise will go away. I had a write up on here i will try and find.

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https://r.tapatalk.com/shareLink?url=http://www.clubfrontier.org/forums/showthread.php?t=253010&share_tid=253010&share_fid=90735&share_type=t


V6 Interior engine Noise Help on new frontier 4.0l

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That's awesome information! Thank you a ton man. I will give it a shot and see if that's the issue and report back once it's done. I might even do a small video on it for Youtube since this seems to be a somewhat common issue.
 

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Discussion Starter #11
Well I just realized that the topic you shared was for a 2016 Frontier. I have a 2007, but nonetheless it's worth looking in to.

I also watched/listened to some of the videos people posted on that thread about the sound. Theirs seems to have more of a diesel engine "wahwahwahwah..." sound while mine it a "tick tick tick..."
 

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Yes mine was a tick tick tick noise

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Discussion Starter #13

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The truck has a timing chain and overhead cam which is typically a little noisier that most engines with timing belts and hydraulic lifters. Especially when you start it up when it's really cold out.
 

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Discussion Starter #15
The truck has a timing chain and overhead cam which is typically a little noisier that most engines with timing belts and hydraulic lifters. Especially when you start it up when it's really cold out.
It still makes the sound even in the Texas heat after driving for an hour lol
 
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