High Oil Consumption - Page 6 - Nissan Forum

Reply
 
LinkBack Thread Tools Display Modes
#76 Old Nov 14th, 2012, 03:31 AM
I Live Here
 
IanH's Avatar
 
Join Date: Feb 2003
Location: Richardson Tx
Posts: 3,998
there is an easy test for valve guide seals.
IF you can see the smoke.
however thinking about this it would fail if the PCV is still hooked up, and the Oil was being sucked in from there.

So here is what I know from experience, mainly with older cars.

When you start or lift off the throttle and when u get back on the throttle the engine will smoke because
1) Oil goes down the guides when standing
2) The vacuum sucks in Oil from head and since you are off throttle, it gets sucked in when you open the throttle. down a nice long hill is a great test.

Oil also can also be sucked in from any gallery that has a leak from intake to Oil (This was on several V8's)

With the addition of CATS minor Oil smoke is no longer a good diagnosis tool, but if its as bad as yours it might help.

Let me also say I am a bit unsure of the valve guides and seals being the issue.

I had issues with GM V8's, Chev's had no real seals, and Buick did but seals wore out quickly. No other issues with any other make ever !!!

So go get a catch can, connect to valve cover, re-route the PCV or block it off, give it a try.

Also I guess if you have the heads off all gaskets and seals will be replaced, new valve guide seals and away you go.

I took down more than one engine just to find a similar problem, start at top, work down, you will see Oil on plugs, ie which cylinders, inside intake, where is it coming from,
For this engine, check for missing butterfly screws, heads off, install new valve guide seals, shop will check for guide wear and clearance ( big bills when you need 16 guides and 15 valves !!! but that was a chevy).

Sorry if this is long and rambling, but i am really concerned this is not your guide seals.

2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold

Last edited by IanH; Nov 14th, 2012 at 03:40 AM. Reason: errors typo
Sponsored Links
Advertisement
 
#77 Old Nov 14th, 2012, 03:43 AM
I Live Here
 
IanH's Avatar
 
Join Date: Feb 2003
Location: Richardson Tx
Posts: 3,998
Ok a couple more questions.
How many miles on this engine ?
Any overheating in the past ?

2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
#78 Old Nov 14th, 2012, 07:03 PM
Sorta-Newbie
 
Join Date: Oct 2012
Posts: 16
high oil consumption update

I have 115k on the engine and this is the first problem ever...Never, ever has over heated. Today I found a machine shop that will also do the take down. They said we can start with the seals and guides, see if they are bad and work our way down just as you suggested. You can see the oil burning upon start up heavier than when driving down the road. Still 1qt per 100 miles. No oil on the plugs when we did the compression test, but 2 plugs did have more build up than I prefer and they were replaced in June, so I replaced the 2 bad ones. It still makes sense to have the machine shop do the job as I can stop in and inspect as they go and maybe even take some pics or video to see what the real issue is. I will probably need it for my fight with the dealer. Thanks again for the assist.
#79 Old Nov 19th, 2012, 04:14 PM
I Live Here
 
IanH's Avatar
 
Join Date: Feb 2003
Location: Richardson Tx
Posts: 3,998
Let us know progress, and the best of luck. My Pathy is at 105K..!!!

2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
#80 Old Nov 19th, 2012, 04:38 PM
Sorta-Newbie
 
Join Date: Oct 2012
Posts: 16
high oil consumption update

well, sent my letter to Nissan for my refund and haven't heard back as yet. Finally found a machine shop that actually will do the job top to bottom. I spoke with the techs, toured their facilities and am satisfied that they know what they are doing. They just called me to say that their tests indicate that the rings are bad; They think it is very unusual for a car with only 115k, and they don't believe it's possible for the CAT to have disintegrated and carried through the valves into the cylinders. They have been rebuilding engines in the valley for over 30 years and came with the "highest" recommendation!. They have an ebay store with excellent reviews. They will call me when they have it apart so I can come look at the damage/symptoms and get a full explanation. Complete teardown and rebuild for 4K. Will verify, take some pics and update as it happens. Should be done latter part of next week. Regards to all for a blessed thanksgiving celebration.
#81 Old Nov 29th, 2012, 12:53 PM
I Live Here
 
IanH's Avatar
 
Join Date: Feb 2003
Location: Richardson Tx
Posts: 3,998
revlee,
Any decisions ? Progress ?

Where are you located ?

2003 Pathfinder from 2004 SE 4WD
1997 SER 5sp Manual from new Rear Ended 2009 !!
Gone to the Knacker yard...
New ride 3.0 manual RWD not a Nissan !!!
1997 Sentra GXE from new .... Sold 2008
2001 Sunny N16 RHD from new (N16 Nissan Bluebird Sylphy) Sold
#82 Old Nov 30th, 2012, 04:52 AM
Nissan Enthusiast
 
Join Date: Nov 2011
Location: Bedford, VA
Posts: 28
Glad you are finally getting to the bottom of the problem. Way back at the beginning of this thread smj999smj addressed a known ring problem and it sounds like there are updated rings available as a fix. You might have your shop look into this so they can install the latest rings. This might also give you more ammo in your "discussion" with Nissan.

Rings may also be at the root of my oil usage because I'm noticing that I use more oil if I do highway speeds than driving around town. I'm up to about 2000 miles/qt using Rotella 15w40 oil and one of those "engine repair" formulas, basically the consistency of STP.

Keep us updated and good luck with Nissan.

1965 Mustang GT clone convertible
1973 Mustang Mach 1 (original owner)
2008 Mustang GT convertible
2000 Toyota Tacoma
2002 Pathfinder 3.5 LE
pathological is offline  
#83 Old Dec 1st, 2012, 08:06 PM
Sorta-Newbie
 
Join Date: Oct 2012
Posts: 16
high oil consumption update

Okay, here's the latest on my 05 pathfinder saga. It has been over a week since I dropped it off with Five Star engines in Glendale, AZ. ( I live next door in Phoenix) They are having difficulty finding some parts and had to go to the dealer. Thought I'd have them replace the water pump too since it's a 10 hour job to get to it on a 4.0 L. I spoke with the tech today, here's the story now.
The right side (bank one) has been completely "cooked." Cylinders had to be bored and oversized pistons/rings for replacements. The top of the pistons were badly burned and weakened. Because I told him that I had replaced the CATS, he thought the RT.CAT was plugged, exhaust couldn't escape causing severe temperatures and destruction of the cylinder walls, rings, and pistons.The oil was being burned off the cylinder walls prematurely, destroying any seal that was there. Once the walls were scored and the rings were torn, oil was obviously being pumped out of each cylinder as the top of the pistons were coated with oil. Seems to make sense, but this engine has never indicated an overheating condition according to the temp gauge. I plan to go down on Tuesday after work to get a face to face with the tech to clarify. They said "hopefully" by the end of this week it should be finished.
#84 Old Dec 2nd, 2012, 03:28 AM
Nissan Enthusiast
 
Join Date: Nov 2011
Location: Bedford, VA
Posts: 28
First off it's a no brainer to replace the water pump now, especially if it's never been replaced. Next they feel the R/H CAT was plugged and caused the right bank to be overheated. OK, what caused the CAT to plug up? Most likely oil, which means you had an initial oil problem causing the CAT to plug up.

It sounds like they are only boring the right side and installing oversized pistons and rings rings there. Both sides should be bored and re-ringed. If not, you will have a balance problem, especially since oversized pistons are needed.

It's interesting that they had to go to Nissan for some parts. If that's the case you might as well just hand them your wallet. For future reference, there is a company called Rock Auto, (rockauto.com). I have dealt with them a lot. Good prices and they have a lot of stuff for just about any car made. It's worth a look.

Good luck and keep us posted.

1965 Mustang GT clone convertible
1973 Mustang Mach 1 (original owner)
2008 Mustang GT convertible
2000 Toyota Tacoma
2002 Pathfinder 3.5 LE
pathological is offline  
#85 Old Dec 12th, 2012, 08:57 PM
Sorta-Newbie
 
Join Date: Oct 2012
Posts: 16
high oil consumption update

I picked up my 05 pathy from 5 star engine in phoenix today. Have only driven it 25 miles, but it is running very well. They stuck to the price quoted (4K to pull and rebuild) and completely remanufactured my engine. All cylinders were bored and new pistons, rings, timing chain, valves, seals, etc. etc. Left side of engine was completely gone. they said the cylinders were nearly square...never seen anything like it. Will drive it this weekend and make sure everything is okay, but I am happy thus far. I am still confused though, in that the codes kept reading "right" bank CAT and misfires, but the left bank was the bad side....the rt CAT was filled with dry black fuel, not oil. I am wondering if the computer is or maybe the mechanic is confusing the sides. Had to pick it up late today, so will have to call the mechanic tomorrow and update this post. Again, I appreciate the discussion and advice. I think I made the right choice as the engine is running great at this point.
Reply

  Nissan Forum > Truck & SUV > Pathfinder

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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




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



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