Nissan 370Z Forum  

Engine Knocking

When my oil temp gets over 90C and if have given it a bit for a little while, I notice the engine has a loud roll over/ knocking noise but

Go Back   Nissan 370Z Forum > Regions > Other Regions > Australia/New Zealand


Reply
 
LinkBack Thread Tools Display Modes
Old 10-06-2009, 08:37 PM   #1 (permalink)
Base Member
 
Join Date: Sep 2009
Location: sydney
Posts: 2
Drives: 370z
Rep Power: 15
mikeacetate is on a distinguished road
Default Engine Knocking

When my oil temp gets over 90C and if have given it a bit for a little while, I notice the engine has a loud roll over/ knocking noise but only at idle.

I have taken it to Nissan and they reckon it's normal. Once it cools down a bit the sound seems to go away. I think it might be the lifters??

Does anyone else have this problem or sound?
mikeacetate is offline   Reply With Quote
Old 10-06-2009, 08:47 PM   #2 (permalink)
Lifetime Premium
 
nogoodname's Avatar
 
Join Date: Nov 2008
Location: Montreal
Posts: 22,357
Drives: E46 M3
Rep Power: 1764
nogoodname has a reputation beyond reputenogoodname has a reputation beyond reputenogoodname has a reputation beyond reputenogoodname has a reputation beyond reputenogoodname has a reputation beyond reputenogoodname has a reputation beyond reputenogoodname has a reputation beyond reputenogoodname has a reputation beyond reputenogoodname has a reputation beyond reputenogoodname has a reputation beyond reputenogoodname has a reputation beyond repute
Default

please take a video. engine knock requires ester oil or an ecu reset, which i did and the horrible knock is gone and i didnt switch to ester oil yet..


another noise that takes place when the car is warm is the cats, it a ticking sound. can be heard when car is on and when its off, but cooling off only....
nogoodname is offline   Reply With Quote
Old 04-29-2010, 12:58 AM   #3 (permalink)
Base Member
 
ryanboy's Avatar
 
Join Date: Mar 2010
Location: Chicagoland
Posts: 201
Drives: Red z34 09 0060
Rep Power: 15
ryanboy is on a distinguished road
Send a message via Yahoo to ryanboy
Default

Quote:
Originally Posted by mikeacetate View Post
When my oil temp gets over 90C and if have given it a bit for a little while, I notice the engine has a loud roll over/ knocking noise but only at idle.

I have taken it to Nissan and they reckon it's normal. Once it cools down a bit the sound seems to go away. I think it might be the lifters??

Does anyone else have this problem or sound?
is this still happening on your car?

i think i have the same issue... my roll over / knocking noise doesnt seem that loud but i do notice it. during idle... i put my hand on top of my engine and i can feel the knock that hits the top every 3-4 seconds.
__________________
Slut RED Nismo Z34 2009 #60

ryanboy is offline   Reply With Quote
Old 05-03-2010, 07:29 AM   #4 (permalink)
Base Member
 
ryanboy's Avatar
 
Join Date: Mar 2010
Location: Chicagoland
Posts: 201
Drives: Red z34 09 0060
Rep Power: 15
ryanboy is on a distinguished road
Send a message via Yahoo to ryanboy
Default

ok i did a video with sound using my phone... i can hear it when you listen near the front tire and on top of the engine. i dont know if this is normal or loud enough but check it out and let me know what you think.

its only 38 seconds and its dark in my garage but what i did was put the phone near the front tire then moved the phone to the engine.

Nismo :: Nismo knocking video by ryanboy20 - Photobucket
__________________
Slut RED Nismo Z34 2009 #60

ryanboy is offline   Reply With Quote
Old 03-17-2011, 03:50 PM   #5 (permalink)
Base Member
 
ryanboy's Avatar
 
Join Date: Mar 2010
Location: Chicagoland
Posts: 201
Drives: Red z34 09 0060
Rep Power: 15
ryanboy is on a distinguished road
Send a message via Yahoo to ryanboy
Default

just getting back to this post since i kinda have an idea now...

since i got my car in 2009, i have been researching this issue all over the planet because the noise really bugs me sometimes. its the LIFTERS by the way. here is the best answer that makes sense an expert told me:

""This is not normal, but it does happen. It's the lifters, 100 % positive on that one. You will distinctively tell the difference between a rod knock and a lifter. A rod knock will most definitely cause your car to run like sh*t as well.

Anyhow, let's go about ways to solve the issue if you want the noise to go away.

A: Run the car at 2000 rpm's for 10 minutes. This acts as a "bleeding" method to the lifters to get the air out of them. This should have been done right when the engine was started the first time.

B: Most of the time, in your case, people who run the car for as long as it has without bleeding them will have to literally take the lifters out of the car, take them apart and soak it in fresh oil. Putting them back together and making sure they don't flip upside-down to let air in and reinstall them will ensure the noise to go away after they are bled using method A once the engine is first started up after re-installation.

Again, this is NOT normal, it just so happens the fallacy of people countlessly repeating it's normal has stuck. I'm not saying you have to do this or your engine will fail from a valve seizing from a failed lifter, because lifters ticking like yours is not a big deal.

Sometimes you just can't do anything about it as they will always tick no matter what you do, but most of the time this is solvable using the above methods, but people are lazy/don't want to take the engine apart (or know how to).

So if it bugs you enough, it's time to take those rocker covers off. Good luck.""

ps... im not going to take my engine apart just for this bull crap noise! ill just deal with it since it doesnt mess with the performance! i wonder if the GT-R has the same problem...
__________________
Slut RED Nismo Z34 2009 #60

ryanboy is offline   Reply With Quote
Old 10-08-2012, 12:15 AM   #6 (permalink)
Base Member
 
Join Date: Sep 2012
Location: Albury
Posts: 5
Drives: 2010 370Z
Rep Power: 12
DJ370 is on a distinguished road
Post

There is a product you can buy called Lifter Free. It is an oil adittive and can be placed in your oil filler along with your oil. This will improve the knock from the lifters but wont fix the issue. I have had cars with Lifter noise and used the adittive and they were fine and it took alot of the knock away. The adittive allows them to move with less effort. Hope this helps. I wouldnt worry though noisey lifters wont hurt your engine try owning an LS1 ! lol its been knocking since day 1 ! and its still making great power and runs fine and i punish that thing.

Also, dont leave the adittive in there for to long. do an oil change after 5,000 Kms. Cheers.
DJ370 is offline   Reply With Quote
Old 10-11-2012, 07:26 PM   #7 (permalink)
37Z
Enthusiast Member
 
37Z's Avatar
 
Join Date: Jun 2009
Location: Florida
Posts: 476
Drives: 370Z MB 6M -sold
Rep Power: 262
37Z has a reputation beyond repute37Z has a reputation beyond repute37Z has a reputation beyond repute37Z has a reputation beyond repute37Z has a reputation beyond repute37Z has a reputation beyond repute37Z has a reputation beyond repute37Z has a reputation beyond repute37Z has a reputation beyond repute37Z has a reputation beyond repute37Z has a reputation beyond repute
Default

Quote:
Originally Posted by ryanboy View Post
just getting back to this post since i kinda have an idea now...

since i got my car in 2009, i have been researching this issue all over the planet because the noise really bugs me sometimes. its the LIFTERS by the way. here is the best answer that makes sense an expert told me:

""This is not normal, but it does happen. It's the lifters, 100 % positive on that one. You will distinctively tell the difference between a rod knock and a lifter. A rod knock will most definitely cause your car to run like sh*t as well.

Anyhow, let's go about ways to solve the issue if you want the noise to go away.

A: Run the car at 2000 rpm's for 10 minutes. This acts as a "bleeding" method to the lifters to get the air out of them. This should have been done right when the engine was started the first time.

B: Most of the time, in your case, people who run the car for as long as it has without bleeding them will have to literally take the lifters out of the car, take them apart and soak it in fresh oil. Putting them back together and making sure they don't flip upside-down to let air in and reinstall them will ensure the noise to go away after they are bled using method A once the engine is first started up after re-installation.

Again, this is NOT normal, it just so happens the fallacy of people countlessly repeating it's normal has stuck. I'm not saying you have to do this or your engine will fail from a valve seizing from a failed lifter, because lifters ticking like yours is not a big deal.

Sometimes you just can't do anything about it as they will always tick no matter what you do, but most of the time this is solvable using the above methods, but people are lazy/don't want to take the engine apart (or know how to).

So if it bugs you enough, it's time to take those rocker covers off. Good luck.""

ps... im not going to take my engine apart just for this bull crap noise! ill just deal with it since it doesnt mess with the performance! i wonder if the GT-R has the same problem...
Add a pre-oiler (check out Amsoil) along with an oil cooler. This may reduce the valve train wear-related issues over the long run. but will not eliminate the valve noise. The GR-R block is different than the run-of-the-mill 370Z block. I am not sure if the the valve train is similar or different that in the Z.
37Z is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
What engine temp are you normally around? RCZ Engine & Drivetrain 92 06-25-2016 02:58 PM
knocking noise from the rear? please help! black09Z Engine & Drivetrain 22 11-24-2009 07:49 PM
G37 engine and 370z engine kannibul Nissan 370Z General Discussions 21 08-12-2009 01:58 AM
Knocking? molamann Nissan 370Z General Discussions 4 03-17-2009 12:14 PM


All times are GMT -5. The time now is 09:29 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2