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Like all engines, lifespan can be extended if it's maintained well not abused. I'm at ~158000 today, original owner and the first actual repair I had to do was replace the oil pressure sensor at 141,000/11 years after buying it. That's a pretty good track record for any vehicle. I used Mobile 1 full synthetic from the first oil change onward and had to replace the timing chain guides at around 145k so that doesn't have a big impact in my view on 'preventing' the guides from wearing. That said, the guides are plastic for a reason and are a wear item that will eventually need replacement. Lastly, I think that anyone who paid to have their valve clearances adjusted probably also paid for a gallon of full synthetic blinker fluid if you know what I mean. :laugh:
Really, becuase i've done several somewhat difficult repairs on my X and i have no desire to try the vavle adjustment, reading the step by step you have to mess with the cam shafts and all sorts of "internal engine stuff".

Im thinking about just dropping it off at nissan for both the timing chains and the vavle adjustment all at once.

I like working on my own vehicle but there are somethings that i think are alittle too much for a weekend garage tinkerer.
 

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Really, becuase i've done several somewhat difficult repairs on my X and i have no desire to try the vavle adjustment, reading the step by step you have to mess with the cam shafts and all sorts of "internal engine stuff".

Im thinking about just dropping it off at nissan for both the timing chains and the vavle adjustment all at once.

I like working on my own vehicle but there are somethings that i think are alittle too much for a weekend garage tinkerer.
Same here. Nissan had the job done for me in two days while I went camping with the loaner they gave me. If I had shop space and it wasn't my DD I'd probably have done it myself but that's not a parking lot type of job.
 

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funny, i mentioned it to the service guys at local Nissan while waiting for something else and before i even finished asking the question they said "yep, takes a few days and about $1200.00."

something of comfort, they added" the techs didn't put it on the work order so they must be fine", " they know what it sounds like"

Do you mind plugging the dealership you use? I've never had my X to a dealer and was wondering how to pick one if I want to do some of these more technical repairs. Sounds like you have a good one.
 

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Does our engine use shim under bucket?
No, doing it the toyota way would be too easy for Nissan.

I read through it briefly years ago as mine rattle a bit. You have to measure all the tapet clearances normally, then pull the lifters and order different size lifters and install them.

I decided to let mine rattle. That was a couple hundred thousand miles ago.

Since most of us around here are OCD about these things, and no one has done it to my knowledge, my guess is its not something worth thinking about.
 

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Do you mind plugging the dealership you use? I've never had my X to a dealer and was wondering how to pick one if I want to do some of these more technical repairs. Sounds like you have a good one.
Tynans nissan in aurora CO. they are ok, sometimes i feel like ive been over charged but it wasnt too bad, and i was ok to pay the price becuase i needed the work done quickly, and they dont try to jerk me around and sell me stuff i dont need. the tech guys seem to know what they are doing.

the best part of that dealer is the parts dept. there is a guy there with a first gen x and he always helps me get the parts i need at decent prices.

If im spending more than a few hundred bucks they throw in a free rental which is nice of them.
 

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I bought a used 2006 Xterra with 106,000 miles on it. I now have 186,000 on it and it runs great. The only problem I have now is the catalytic converter gets a little clogged once in a while, but with a can of Cataclean every quarter keeps it going. Has anybody tried using "Slick 50" on an Xterra? It saved a different car when the oil pan cracked and dripped all of the oil while driving... replaced the pan and kept driving like nothing happened.
 

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Really, becuase i've done several somewhat difficult repairs on my X and i have no desire to try the vavle adjustment, reading the step by step you have to mess with the cam shafts and all sorts of "internal engine stuff".

Im thinking about just dropping it off at nissan for both the timing chains and the vavle adjustment all at once.

I like working on my own vehicle but there are somethings that i think are alittle too much for a weekend garage tinkerer.
If it is anything like my 2000 X, you might as well have the water pump replaced at the same time. I haven't changed my 06 timing belt yet.
 

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A whine which is more annoying than listening to a woman complain.


https://youtu.be/IAdR9XnazCo

Well finally I hear the whine. I'd been worrying about this after reading through the forums and trying to make sure that I was staying ahead of any issues to come. Right at 200,000 miles and running great, the timing chain/tensioner issue was one what had me really worried, because I bought the vehicle at roughly 177,000 miles and didn't know if this had ever been addressed. I'd listened to other videos, but couldn't pick out the sound, and because I got it at 177,000 miles I didn't know what "normal" sounded like for this engine. Well the revving in this video sounds like my engine for sure. I'm going to give it a closer listen, but after hearing this video, I think that I have the whine.

Just did catalytic converters, and can't afford another big repair at the moment (really couldn't afford that one!) but I think it's evident that I need to start putting some money away for this. Any idea on how long you can go with the whine? or are there any other symptoms that come along to tell you not to wait any longer?
 

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An old serpentine belt will whine also.
Hopefully it's something simple.
 

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Well finally I hear the whine. I'd been worrying about this after reading through the forums and trying to make sure that I was staying ahead of any issues to come. Right at 200,000 miles and running great, the timing chain/tensioner issue was one what had me really worried, because I bought the vehicle at roughly 177,000 miles and didn't know if this had ever been addressed. I'd listened to other videos, but couldn't pick out the sound, and because I got it at 177,000 miles I didn't know what "normal" sounded like for this engine. Well the revving in this video sounds like my engine for sure. I'm going to give it a closer listen, but after hearing this video, I think that I have the whine.

Just did catalytic converters, and can't afford another big repair at the moment (really couldn't afford that one!) but I think it's evident that I need to start putting some money away for this. Any idea on how long you can go with the whine? or are there any other symptoms that come along to tell you not to wait any longer?
The whine is pretty distinctive. Mine was most noticeable the instant it came off idle on RPM ramp - if that helps.

I did let mine whine quite a while. but having to do it over I wouldn't wait any longer than I had to. My pensioner pads were gone, and it was just about to start wearing into the tensioners themselves, which my understanding makes the repair more costly.

So I suppose it depends on how long they have been whining and how much longer your thinking of driving it.
 

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My '06 is 136K. No whine, no valve noise. I have a company vehicle for everyday commuting, etc., so hope to have this X for another 5 years, at a minimum. Mine had a 100K service at a dealer, but I don't know what they do at 100K. Does anyone here know?
 

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My '06 is 136K. No whine, no valve noise. I have a company vehicle for everyday commuting, etc., so hope to have this X for another 5 years, at a minimum. Mine had a 100K service at a dealer, but I don't know what they do at 100K. Does anyone here know?
If you have all your original owner’s manuals the maintenance schedule is in one of them. The main one? I forget which, but def know they are there.

You also should have gotten an invoice listing the work. Call the dealer and big em to get you a copy.
 

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I've had 2 xterras that both needed timing chains, first one only had like 120k on it and the 2nd at about 150k. Only was a distinct whine that went up and down in pitch with RPM (sounds like a supercharger) and the other was a nasty sounding rattle for 1 second at startup. Excluding this totally repairable issue I don't see any reason these motors wont live to 300k with proper maintenance.
 

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My '06 is 136K. No whine, no valve noise. I have a company vehicle for everyday commuting, etc., so hope to have this X for another 5 years, at a minimum. Mine had a 100K service at a dealer, but I don't know what they do at 100K. Does anyone here know?
2014 Nissan
Replace engine oil
Replace Brake Fluid
Rotate tires
Thorough inspection
 

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Pull the serpentine belt off and see if the noise stays the same or goes away, then you'll know if it's a belt driven noise or engine.
I will try pulling the belt off, but if that video posted is indicative of the noise I'd be hearing, then I think it's a safe bet that I'm having the tensioner issue, and at 200,000 miles too? It's probably time.

So I suppose it depends on how long they have been whining and how much longer your thinking of driving it.
It's hard to tell how long really, as far as I remember it's sounded like this. I got the vehicle at 177,000 miles and I'm about 20 miles from 200,000. I'd like to keep driving it through the winter and have it as a Spring project that I do myself. That would give me time to plan, learn the job and purchase the materials. I drive about 45 miles a day on average. That's why I'm curious about continuing symptoms, or something to listen for that says do it now.

The X drives great now and I'd like to get it to 300,000+
 

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Pull the serpentine belt off and see if the noise stays the same or goes away, then you'll know if it's a belt driven noise or engine.
I will try pulling the belt off, but if that video posted is indicative of the noise I'd be hearing, that I think it's a safe bet that I'm having the tensioner issue, and at 200,000 miles too? It's probably time.

So I suppose it depends on how long they have been whining and how much longer your thinking of driving it.
It's hard to tell how long really, as far as I remember it's sounded like this. I got the vehicle at 177,000 miles and I'm about 20 miles from 200,000. I'd like to keep driving it through the winter and have it as a Spring project that I do myself. That would give me time to plan, learn the job and purchase the materials. I drive about 45 miles a day on average. That's why I'm curious about continuing symptoms, or something to listen for that says do it now.

The X drives great now and I'd like to get it to 300,000+
In the same boat at 225k. I have some noises under the hood, but nothing that sounds too angry. Was thinking about bringing it to the dealer for a diag. and see what they suggest. There are other videos where you can hear the chains slapping because they are loose and others where you hear the chain rubbing over the metal of the guide. Both of those are pretty obvious and angry sounding. Also going to run an oil analysis which may show if I'm wearing out beyond the plastic part of the guides. I fully intend to go over 300k also. This motor has been very reliable so far.
 

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I wholeheartedly expect to exceed 250,000 miles on the engine in my 2006.
(The only caveats: selling it for a different Xterra or going with the V8 swap instead of doing the timing chains....)

Every engine has weak points. Every engine needs PM. Every engine has wear items that require replacement at some point.

Outside of those factors, the VQ40 tself is a damn robust design. One of the best I’ve owned. FAR superior to the V8 travesty that Rover used in the Disco/RR for too many years. And on par with the beautifully bulletproof m42 4 banger BMW developed.

I define both valves and timing chains as “eventual” wear items. Some might never need touched. Others may require several visits over time.
The defining factors are hugely varied by vehicle history, PM, abuse and use, etc. BUT, no engine lasts forever. And good maintenance will take most modern engines far past the manufacturers projected obsolesence.

I’m just shy of 140,000. It’ll either be a timing chain job or the V8 swap whenever I start to hear the tell tale “whine”.
(The service history of my X, while pretty comprehensive, never mentions TC replacement.)
Valves? Who knows. Most likely never. But if they need done they’ll get done.

As one of our esteemable veteran members said in another thread, “we are outliers”, who care more for our vehicles than the general public.
We define every problem, address every issue, chase each tiny annoyance til the bitter end.

And we ALWAYS open up the engine.<a href="http://thenewx.org/forum/images/TheNewX_2015/smilies/tango_face_wink.png" border="0" alt="" title="Wink" >:)</a>

Very well said, describes how I feel about the X to a T
 
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