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Premium Member
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Discussion Starter #1
Hi all,

Before i start, i did read other topics about this same issue but some people didn't have the same symptoms.

I'll break it down real quickly to avoid typing a long bible.

X is overheading both city and Hwy but on the hwy when i leave the gas pedal the temp go's down.

When X is shutdown, coolant container is a little bit more than Full BUT when i start is half way below Full line o.0???

I do hear some ticking when i start it but after sometime that noise disapear.

I'll try to upload a video maybe if we can hear it well.

I got a bad feeling about my X ����*♂

 

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TNX Veteran
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541 Posts
Any recent work done? Is the springed cap on your coolant reservoir or on the radiator? Has the t-stat ever been changed?

I don't like the sound of that tapping... I'm assuming no codes, smoke or obvious other signs besides the tapping and OHing.
 

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Premium Member
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73 Posts
Discussion Starter #4
Any recent work done? Is the springed cap on your coolant reservoir or on the radiator? Has the t-stat ever been changed?

I don't like the sound of that tapping... I'm assuming no codes, smoke or obvious other signs besides the tapping and OHing.

The springed cap is on the coolant reservoir, is that alright? 🤔🤔

I never changed my Thermostat, i did flushed all my fluids last year.

No smoke, no check engine, no sign beside tapping. The funniest part is, today let a garage change my engine oil aand when i drove from my gf work back home i notice its been overheating but at the same time there's a heal wave here in Montreal, maybe it has something to do as well :/
 

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304 Posts
Could be a few things. T-stat, rad, water pump... So some quick tests. Does your fan clutch kick in? Its always turning some, but when the X reaches a certain temp, you will hear it kick in. Start it cold and let it idle in park with the hood open. look and listen for the fan clutch to engage when it warms up. If this doesnt happen then you'll know. touch the upper and lower rad hoses. Are they the same temp? can you feel the coolant passing? How do the fins in your rad look?
 

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Premium Member
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73 Posts
Discussion Starter #7
Could be a few things. T-stat, rad, water pump... So some quick tests. Does your fan clutch kick in? Its always turning some, but when the X reaches a certain temp, you will hear it kick in. Start it cold and let it idle in park with the hood open. look and listen for the fan clutch to engage when it warms up. If this doesnt happen then you'll know. touch the upper and lower rad hoses. Are they the same temp? can you feel the coolant passing? How do the fins in your rad look?
My engine Clutch fan is always turning my fan and its always louuuuud. Many people been asking me if its normal and even the mechanic who worked on my car said its normal. 🤔

I'll test the upper and lower rad hoses tomorrow morning, now its too late for any test since my X is loud AF, especially the Fan makes it loud.

I remember my old civic fan didnt make so much noise and daily basis. It never stops unless i turn engine off.
 

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Stuck closed t-stat is the most likely suspect.. cheap part, just a pain to replace on the x. You can test a t-stat by pinching a thread with the spring on the tstat and lowering it into a mug of hot water same temp as its rated for, seeing if the spring opens and iy drops to the bottom of the mug. but id just replace it anyway. yesting just lets you know if yuo found the issue
 

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Premium Member
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Discussion Starter #9
Stuck closed t-stat is the most likely suspect.. cheap part, just a pain to replace on the x. You can test a t-stat by pinching a thread with the spring on the tstat and lowering it into a mug of hot water same temp as its rated for, seeing if the spring opens and iy drops to the bottom of the mug. but id just replace it anyway. yesting just lets you know if yuo found the issue
I'll give it a try to change it since it was never done since i'm the 2nd owner. And after changing it, i'll test the t-state at the same time just for myself.

Thanks everyone.
Have a great day/night depend on your timezones.
 

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NewX’er 4life
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2,437 Posts
Make sure there isn't an air pocket in the rad. You have to park on a steep incline with the front elevated to "burp" the air out of the system. Take the res. cap off when you do this, and hold 2500-3000 rpm for a few sec, repeat. Sometimes this isn't enough and you have to use a vacuum to get the air pocket out.

That engine is ticking loudly. I hope it isn't the lifters or something related. What oil did you put in it? The VQ engine is more prone to oil shearing from what I've gathered and you shouldn't run anything thinner than 5w30 (ie 5w20 or 0w20 etc). I'd highly suggest running Total Synthetic Quartz (first choice) or Kendall Synthetic to see if it quiets down. Mine was a bit loud with whatever the dealer had in it until I switched (although not this loud).
 

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Discussion Starter #11
Make sure there isn't an air pocket in the rad. You have to park on a steep incline with the front elevated to "burp" the air out of the system. Take the res. cap off when you do this, and hold 2500-3000 rpm for a few sec, repeat. Sometimes this isn't enough and you have to use a vacuum to get the air pocket out.

That engine is ticking loudly. I hope it isn't the lifters or something related. What oil did you put in it? The VQ engine is more prone to oil shearing from what I've gathered and you shouldn't run anything thinner than 5w30 (ie 5w20 or 0w20 etc). I'd highly suggest running Total Synthetic Quartz (first choice) or Kendall Synthetic to see if it quiets down. Mine was a bit loud with whatever the dealer had in it until I switched (although not this loud).
Whats a res cap?🤔 i believe you mean rad so im going to try now :D

I always put 5w30 full synthetic.

I hope this engine will last until i swap titan in.
 

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The ticking sound is a bit loud. Mine sounds like that too but not as loud. I believe brand of oil will make a difference as well. I used to use Mobil One Synthetic 5w30. Didn't have a problem with it. But some people online were complaining about the noise in the winter time with Mobil One. I then switched to Pennzoil Ultra Platinum. It's better for sure.

As for the overheating goes. Probably the t-stat like others have said. I recently had that problem, kinda. My temps usually will read mid 190F in the winter, low 200F in summer. It was the winter time, upper 30s and low 40s. My coolant temp was at mid 200 to 210. Which was weird... That's actually worse than the summer temp? I had a new t-stat installed about 3 years ago. Didn't think it would be the t-stat. I did notice that the upper rad hose is boiling hot but the lower hose is barely warm. Online people say it's normal because hot coolant travels down and rad cools it, so lower rad hose should be warm. Thought maybe it's the fan clutch. Replaced it. No luck. Finally, I decided to go ahead and change out the t-stat (this time with 170 degree one 21200-4W01B) Problem solved! Now the upper rad hose is hot, lower hose is warm to hot.

If you end up changing out your t-stat. Learn from my mistake. Do not use cheap gasket! I used a cheap one and a few months later, it started to leak coolant. And I wouldn't have notice it if I didn't remove the intake to look for a washer that I had dropped. I purchased a better quality gasket (rubber coated) and thought it's a done deal. Well, the old gasket did not come off in one piece... it ripped into many many many small pieces... Some got stuck on the t-stat that would not come off. I even used Citrol 266, the strongest chemical I have to remove ****, couldn't get 100% of **** off the t-stat. I gave in and bought ANOTHER new t-stat. So far everything is good. Hopefully it stays that way.

Make sure you test the t-stat before you install it. Even if it's OEM (and I do recommend buying OEM parts), it can still be defective.
 

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After purchasing my Xterra, I replaced it's oil with 5w-30 Royal Purple.
This oil was on sale and priced reasonably.
I thought my X ran a bit smoother and even seemed quieter.

However, when it came time for the 2nd oil change the RP was not on sale.
For this reason I purchased Pennzoil Ultra Synthetic which was $23 at Walmart and used a $10.00 rebate for a total cost of $13 for 5 quarts.

To be honest, my X seems to run even better with the Pennzoil
 

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NewX’er 4life
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2,437 Posts
Ya, the VQ is picky with the oil. Mobile 1 Synthetic didn't get rid of the ticking in mine and I could really feel the X get a bit sluggish after a couple thousand km's. My switch was to Kendall Gt 1 synthetic. I've recently tried Total Quartz in my X-trail and it was even better than the Kendall so next change I'm going with Total Quartz in the Xterra as well.
 

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Premium Member
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73 Posts
Discussion Starter #18
Update: my Thermostat was the problem but at the same time my fan kept working like all the time my X was on, so had to change my Fan clutch to fix this noisy fan!

Plus temperature gauge was rusty and changed this as well. Now feels like the X is flying a cloud 😂🤦*♂. Sooo quiet ❤❤❤.


Next thing to work on is the thicking noise, i'll change the Oil brand name next time. ✌

Have great day everybody!
 
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