2005 nissan altima 2.5 - Nissan Forum
QR25 2.5L Engine Engine Discussion: 2002+ Sentra SE-R and SpecV

 
LinkBack Thread Tools Display Modes
post #1 of 7 Old Nov 5th, 2016, 11:51 AM Thread Starter
NissanForums Newbie
 
Joined: Nov 2016
Location: New Paris, pa.
Posts: 6
Send a message via AIM to brandibaby23 Send a message via MSN to brandibaby23 Send a message via Skype™ to brandibaby23
2005 nissan altima 2.5

Hi I am new to this but not sure what else to try. I bought a used 05 altima in 2014, since I have replaced an alternator, A/Traxle seal(front pump), crankshaft seal, engine mounts, the cat was punched out at garage that worked on it, the transmission sensor was resoldered due to bad shifting. After all of that while driving and I old come to a stop the engine would die and the oil light would come on even though I had enough oil. SO I replaced the oil sending unit that didn't fix it, so then I checked the filter inside the oil pan, and in the pan I found small pieces of teeth like metal to which we have cam to conclusion may be balance shaft gear teeth, the car runs ok, does not leak anything, does produce white smoke at startup, does use a little bit of oil, number one spark plug has oil in it, does not leak or lose antifreeze, gas usage has not been as good as when I first bought, I had a compression test done from a local guy it as 90 90 90 70, but after reading I think he may have done it wrong and I can't find what the correct pressure should be on my car. I have been learning slowly so bear with me if my mechanical lingo is somewhat off. ANY way the car does have an engine noise I only notice during acceleration but isn't present when gas isn't being pressed. QUESTION is does this sound like balance shafts and gear being bad, can I cut the chain in the oil pan for now? what is a normal compression test result? the car has 174,000 I drive it, and it seems to run ok with xception of the noise I mentioned. Any input or thoughts would be appreciated. thank you all

brandibaby23 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 Old Nov 5th, 2016, 09:18 PM
Sup Mod keeping the peace
 
rogoman's Avatar
 
Joined: Dec 2004
Location: NJ (Philadelphia area)
Posts: 5,994
The small pieces of metal you found in the oil pan could from the balance shaft assembly or it could be from the cam gears, the crankshaft gears or the timing chain guide. You would have to remove the timing chain cover and do an inspection. If I was you I wouldn't fool around with trying to cut the balance shaft chain out. If the assembly is damaged, the proper thing to do is replace the assembly.

Does the oil light come on when the engine is idling; It sounds like you may have low oil pressure which could be caused by several factors. Worn rod/main bearings. Plugged up oil filter. Dirty oil pickup. Most of the time it's the oil pump which may be worn and not producing the proper oil pressure/volume. You can check the pressure very easily by installing a temporary mechanical oil pressure gauge. You would remove the oil sensor which is located next to the oil filter and install the mechanical oil pressure gauge in it's place; you may need to get an 1/8 BSPT to 1/8 NPT adapter to hook up the gauge. Very low oil pressure could be causing the cam chain tensioner to not properly operate which could cause the noise you're encountering.

With the engine fully warmed up, the pressure should be as follows:
idle - at least 14 psi
2000 RPM - 43 psi

The proper way to do a compression test:

Warm up the engine to full operating temperature.
Release the fuel pressure.
Remove the ignition coil and spark plug from each cylinder.
Disconnect the fuel injector harness connector on each injector to avoid any residual fuel injection during the measurement.
Install the compression tester with the adapter into the spark plug hole.
With the accelerator pedal fully depressed, turn the ignition switch to the “START” position to crank over the engine.
When the gauge pointer stabilizes, read the compression pressure:
Standard - 181 psi
Minimum - 153 psi

KA-T for life, yo!
rogoman is offline  
post #3 of 7 Old Nov 5th, 2016, 09:31 PM Thread Starter
NissanForums Newbie
 
Joined: Nov 2016
Location: New Paris, pa.
Posts: 6
Send a message via AIM to brandibaby23 Send a message via MSN to brandibaby23 Send a message via Skype™ to brandibaby23
Thanks for your time in replying and detail was great, I guess I forgot to mention, the oil light problem was fixed when we dropped the oil pan and found the pieces of metal, it had the oil pan filter clogged, now it runs and I no longer get the oil light or stalling, it runs ok now with the exception of the rattling. If I'm driving about 65 I can hear a tapping if I accelerate it goes away and if I let off the gas it goes away. Just has me stumped, and thank you for the compression test specs. Gonna do that when I can get someone to do it. Strapped for cash but little by little I guess.
brandibaby23 is offline  
Sponsored Links
Advertisement
 
post #4 of 7 Old Nov 24th, 2016, 08:37 PM
Sup Mod keeping the peace
 
rogoman's Avatar
 
Joined: Dec 2004
Location: NJ (Philadelphia area)
Posts: 5,994
The rattling sound could be caused by a problem with the timing chain or balancer assemblies. IMO, remove the timing chain front cover and find out where those broken pieces came from. With all those broken pieces, you could have a disaster waiting to happen. The rattling sound could also be caused by excessive piston-to-wall clearance.

KA-T for life, yo!
rogoman is offline  
post #5 of 7 Old Nov 24th, 2016, 09:13 PM Thread Starter
NissanForums Newbie
 
Joined: Nov 2016
Location: New Paris, pa.
Posts: 6
Send a message via AIM to brandibaby23 Send a message via MSN to brandibaby23 Send a message via Skype™ to brandibaby23
Thanks guys, I just yooknoilmpan off the other day to check out cutting the balance shaft chain, we found a small amount of copper colored shavings in there and from what I've read, it seems I may be in nerdy of a new motor soon, so I haven't drove it since, I can't afford a new/used motor so I guess I will throw my hands up in defeat :-(
brandibaby23 is offline  
post #6 of 7 Old Nov 24th, 2016, 09:16 PM Thread Starter
NissanForums Newbie
 
Joined: Nov 2016
Location: New Paris, pa.
Posts: 6
Send a message via AIM to brandibaby23 Send a message via MSN to brandibaby23 Send a message via Skype™ to brandibaby23
Ha ha sorry guys, look past my goofy spelling my phone has some letters that don't work! And if I do not pay perfect attention it just makes up it's own words!
brandibaby23 is offline  
post #7 of 7 Old Nov 25th, 2016, 09:10 AM
Sup Mod keeping the peace
 
rogoman's Avatar
 
Joined: Dec 2004
Location: NJ (Philadelphia area)
Posts: 5,994
Quote:
Originally Posted by brandibaby23 View Post
Thanks guys, I just yooknoilmpan off the other day to check out cutting the balance shaft chain, we found a small amount of copper colored shavings in there and from what I've read, it seems I may be in nerdy of a new motor soon, so I haven't drove it since, I can't afford a new/used motor so I guess I will throw my hands up in defeat :-(
The copper colored shavings are from the rod/main bearings which in this case is causing the engine rattle due to excessive bearing clearances or spun bearings. What probably happened is when the timing chain assembly started to experience breakage causing the oil pickup screen to get plugged up with debris; this resulted in restricted oil flow which caused damage to the bearings.

You may be able to salvage the engine by replacing the timing chain assembly and replacing the bad rod/main bearings.

KA-T for life, yo!
rogoman is offline  
Reply

  Nissan Forum > Sentra, Pulsar, NX, B14 200SX > QR25 2.5L Engine

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Nissan Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
2005 Nissan Altima SL 3.5 ? 05nismogurl L31 2002 - 2006 2 Dec 11th, 2015 10:11 PM
2005 Nissan Altima SL 3.5 05nismogurl Nissanforums AutoGuide Support / Help 0 Nov 28th, 2015 08:46 AM
2005 Nissan Altima? LilSnoop40 L31 2002 - 2006 0 Jan 22nd, 2008 11:22 AM
2005 Nissan Altima 3.5 Se REVERSE_ACTION L31 2002 - 2006 3 Apr 16th, 2004 11:39 PM
2005 Nissan Altima Predictions NNA L31 2002 - 2006 26 Oct 5th, 2003 09:27 PM

Posting Rules  
You may post new threads
You may 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

 
For the best viewing experience please update your browser to Google Chrome