Question about 2003 Nissan Pathfinder

1 Answer

Oil still going to intake manifold after changing pcv pathfinder

Pathfinder 2003 ,as oil was going to intake manifold i put a new pcv valve but oil continue to travel to intake manifold through it ,oil increased specialy after stopping enging and restarting after minutes too much smoke ,i heared that i should change the valve cover is that true.
now car shake too much in accelaration

Posted by on

  • 7 more comments 
  • hani_m Dec 31, 2008

    no crankcase is not over filled,

  • hani_m Dec 31, 2008

    it was consuming oil when pcv was connected ,but it is not consuming after i drove it for three days with pcv valve hose disconnected vacum line blocked ,breather hose removed from duct to remove smoke ,yes it is puffing vapor from disconnected breather hose ,miles is 120 k ,but rings changed 2 month ago

  • hani_m Jan 01, 2009

    please clearfie which pipe or outlet

  • hani_m Jan 01, 2009

    no taper & cylinders was not honed ,still no oil loss after 300 miles of driving

  • yadayada
    yadayada May 11, 2010

    well it may still seat in and stop blowing by, which is the cause of the oil in the intake.

  • yadayada
    yadayada May 11, 2010

    when u did the rings did you check the cylinders for excessive taper and wear? did u hone them with a quality stone ball type honer to break up cylinder glaze? it sure sounds like poor ring seal to me.

  • yadayada
    yadayada May 11, 2010

    try spraying carb spray into the intake, you may have trapped oil, it takes along time to burn that off, the carb spray will help to accelerate the burn off.

  • yadayada
    yadayada May 11, 2010

    does the engine have allot of crankcase pressure, when u pull the PCV out do u fell any pressure there or seeing puffing vapor or smoke? how many miles on truck? does it use allot of oil? more than a quart per 500 miles driven?

  • yadayada
    yadayada May 11, 2010

    is the crankcase overfilled?



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Nissan Master
  • 22,306 Answers

Look closer for a split pipe or blocked outlet

Posted on Jan 01, 2009

  • Colin Stickland
    Colin Stickland Jan 02, 2009

    too much backpressure from the sound of it please refer to emmisionwiz .If anything the cause could be the fact that the pistons are worn in the piston ring grooves where the rings fit.or most likely to me is that you didnt clean out the ring grooves and rings have broke when you refitted the pistons



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

How can I stop oil from being sucked into the intake manifold thru the PCV valve on my 2002 Suzuki XL7? It's smoking real bad all the time and I just put a new PCV in.

replace the air filter

PCV valves allow the sump pressure to be sucked into the manifold when the vacuum gets past the point to open the valve
from your description of the problem
you have more than a pcv valve problem
more like badly worn rings and missing valve stem seals

Dec 20, 2017 | Suzuki Cars & Trucks

1 Answer

Pcv location ford escape 2010 2.5 gas engine

The PCV valve is located under the intake manifold on the non-hybrid 2.5L engine. The intake manifold MUST be removed in order to service the PCV valve.
The PCV valve sits in the crankcase vent oil separator.

May 16, 2014 | 2004 Ford Taurus

1 Answer

I have changed pcv valve twice and still getting oil in breather

The PCV valve does not control the oil situation, it just keeps the pans and valve covers from blowing off during a backfire. Excessive Oil in the breather is a result of excessive crankcase pressures, usually due to a worn engine, specifically rings.
SOME oil is normal, especially if you are loaded heavily and hard on the throttle.
There is a tester that measures crankcase pressures, but usually some other manifestation shows, like excessive oil consumption.

the PCV system draws crankcase fumes into the intake at idle and lower throttle situations. air going into the crankcase is filtered by the small PCV filter, where the oil shows up....

At highter throttle and lower intake manifold pressures, the system reverses, the PCV valve closes, and the fumes exit the crankcase VIA the breather filter. All of this is normal.

It costs tons less to periodically clean or replace the PCV filter.

Feb 13, 2011 | 1988 Ford Econoline

1 Answer

Where is the pcv valve located on a 1992 Nissan Pathfinder?

this pcv valve screws into the intake manifold , theres a hose that runs from the pcv valve to the intake. heres a picture of it to help you locate it.johnjohn2_43.jpg

Dec 19, 2010 | 1992 Nissan Pathfinder

2 Answers

I have a an oil fouled plug at cylinder 7 just below the PCV valve....could a bad PCV be causing this problem?

Yes, it very well could be a faulty PCV, and it might also be a leaking intake manifold gasket allowing oil to enter the intake through the lifter valley area inside of the engine.

Jun 07, 2010 | 2003 Dodge Durango

2 Answers

So this is my problem....i own a 2004 crown victoria unmarked police unit. it all started when the check engine light came on. i got the code, it said something about the spark plugs. i changed all 8 with...

possible bad rings, i would put some motor tune-up in oil will clean carbon off rings, its made by company called seaform and is called motor tune-up, put hole can in oil and drive for about 30 days ,its good stuff can also use in fuel to clean injectors, could also have worn out valve stem seals causing oil to leak pass valves into cyl

Feb 05, 2010 | 2003 Ford Crown Victoria

3 Answers

Where is the pcv valve located on a 2003 ford ranger

  • The PCV valve can be located in several places. The most common location is in a rubber grommet in the valve cover. It can be installed in the middle of the hose connections, as well as installed directly in the intake manifold.
  • Once the PCV valve is located, make sure all the PCV system hoses are properly connected and that they have no breaks or cracks.
  • Remove the air cleaner and inspect the air and crankcase filters. Crankcase blowby can clog these with oil. Clean or replace such filters.
  • Oil in the air cleaner assembly indicates that the PCV valve or hoses are plugged.
  • Make sure you check these and replace the valve and clean the hoses and air cleaner assembly.
  • When the PCV valve and hose are in satisfactory condition and there is oil in the air cleaner assembly, perform a cylinder compression test to check for worn cylinders and piston rings.
  • Feb 27, 2009 | 2003 Ford Ranger Regular Cab

    1 Answer

    High oil consumption

    The PCV valve is located on the intake manifold. It screws in and there will be a hose to the valve cover. Pricey little devil I must say.
    RPM Northwest

    Jan 22, 2009 | 2003 Toyota Corolla

    2 Answers

    Pathfinder 2003 pcv

    The PCV valve is located in the valve cover on the passenger side of the vehicle. The valve is closer to the firewall than it is to the front of the engine. It has a hose attached to it and threads into the valve cover.

    Nissan Scope Technician- 10+ years experience is Nissan dealership

    Nov 02, 2008 | 2003 Nissan Pathfinder

    Not finding what you are looking for?
    2003 Nissan Pathfinder Logo

    Related Topics:

    612 people viewed this question

    Ask a Question

    Usually answered in minutes!

    Top Nissan Experts


    Level 3 Expert

    77499 Answers

    Phil Lovisek
    Phil Lovisek

    Level 3 Expert

    726 Answers

    Colin Stickland
    Colin Stickland

    Level 3 Expert

    22306 Answers

    Are you a Nissan Expert? Answer questions, earn points and help others

    Answer questions

    Manuals & User Guides