Timing Chain Noise - Page 3

psk79 · Oct 13th, 2007, 09:45 PM

Quote:

Originally Posted by Altiman93

Ok.i removed the upper guide, and still makes the nosise. ive read threw everything here, and have not found an awnser(unless i did't read correctly), is the nosie bad? do i need to worry? will it mess up my engine? some one help me please!

Same problem with me.. the mechanic said he took offf the valve cover and was able to reach teh upper guide (only one) and remvoed it. but he doesnt see that chain even touches it..so he diesnt think that the cause. However, the lower timing chain is still there.. as i said before getting to the lower timingchain is a sob...takes upto 6hrs of labor....dont know what to do...

But what I dont understand is why in thehello does it maek the noise at 2000rpm and not below and not if you accelerate harder....that makes me wonder if this is really the timing chain...

Cmon NIssan experts...give yur opinions...

Altima SSS · Oct 14th, 2007, 12:18 AM

Quote:

Originally Posted by psk79

But what I dont understand is why in thehello does it maek the noise at 2000rpm and not below and not if you accelerate harder....that makes me wonder if this is really the timing chain...

It's possible the chain could "resonate" at a certain constant RPM with no real load on the engine.

Are you sure it's not the Alt/PS/WP belt's idler pulley? My engine makes some noises on the cam chain/belt side of the engine at certain RPMs, and I think it's the idler pulley and/or belt making the noise. I used a stethoscope on the idler mounting bolt, and it sounded like its bearing is getting dry and rough. If I rev the engine up some the noise will change and seem to go away at certain RPMs.

psk79 · Oct 14th, 2007, 09:26 AM

Quote:

Originally Posted by Altima SSS

It's possible the chain could "resonate" at a certain constant RPM with no real load on the engine.

Are you sure it's not the Alt/PS/WP belt's idler pulley? My engine makes some noises on the cam chain/belt side of the engine at certain RPMs, and I think it's the idler pulley and/or belt making the noise. I used a stethoscope on the idler mounting bolt, and it sounded like its bearing is getting dry and rough. If I rev the engine up some the noise will change and seem to go away at certain RPMs.

I found this.. wondering if this is the case...as the guy who sold me the car got a new central pipe assy and muffler replaced....
Nissan Altima Loud Growling Sound

I will ask the mechanic to take a look at this next week...

Altima SSS · Oct 14th, 2007, 01:17 PM

Quote:

Originally Posted by psk79

I found this.. wondering if this is the case...as the guy who sold me the car got a new central pipe assy and muffler replaced....
Nissan Altima Loud Growling Sound

I will ask the mechanic to take a look at this next week...

If you are hearing this noise from inside the car while driving then I'd say it could be something else. I doubt you would hear engine noises inside the car while driving unless they were very loud, which would mean the engine was about to destroy itself.

I found this interesting thread too ... about cam chain tensioner issues.
Oil Change Destroys Nissan Altima??

Altiman93 · Oct 14th, 2007, 01:45 PM

Its funny, because mine only makes the noise when its warmed up, and its idle'ing when i give it just a little bit of gas it stops, but when it idles again, the noise comes back? I heard that (dont know if its true or not) that the noise is normal. True??? i heard that all timing chains on the alty's make that noise. but damn does it suck not knowing what it is

Quote:

Originally Posted by psk79

Same problem with me.. the mechanic said he took offf the valve cover and was able to reach teh upper guide (only one) and remvoed it. but he doesnt see that chain even touches it..so he diesnt think that the cause. However, the lower timing chain is still there.. as i said before getting to the lower timingchain is a sob...takes upto 6hrs of labor....dont know what to do...

But what I dont understand is why in thehello does it maek the noise at 2000rpm and not below and not if you accelerate harder....that makes me wonder if this is really the timing chain...

Cmon NIssan experts...give yur opinions...

Yahnozha · Oct 20th, 2007, 04:41 PM

http://www.nissanforums.com/u13-1993...noise-fix.html

**Asleep** · Oct 20th, 2007, 06:49 PM

thank you for searching but please, dont revive a 3 yr old thread to ask a question.