Question about 2004 Ford Explorer

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2004 explorer engine knocking

My 2004 Ford Explorer started making a knocking noise all of a sudden but the car isn't running any differently the car runs fine and sometimes the noise will stop for a 5 or 10 minutes and then come back again. The car never over heated or was low on oil. I took it to a mechanic and he says I need a new engine I just dont understand how this can be especially since there doesn't seem to be anything wrong with the car except for this knocking noise. all fluid levels are good, one mechanic told me I blew my engine but the car runs fine?? and another said its probably the tensioners I don't know what to do at this point

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Check the oil pressure manually with a gauge. Make sure you have oil pressure. Perhaps you need a new oil pump, or new lifters. Get a professional opinion from a non interested party. Save money, get a diagnosis.

Posted on Apr 18, 2014

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  • 34 Answers

CHECK YOUR KNOCK SENSOR

Posted on Apr 19, 2014

6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

samson-1
  • 153 Answers

SOURCE: ford focus turbo diesel low oil pressure with no knocks from engine

Possible oil sending unit problem.

Posted on Oct 24, 2008

Brian032472
  • 150 Answers

SOURCE: 2003 Ford Explorer is knocking and blowing cold air when I turn the knob to the heat

The blend door (mode door ) is a very common issue there is even an associated TSB t(technical service bulletin) it has to do with the blend door becoming warped and binding the accuator. In an opened or semi-closed position

Posted on Nov 19, 2008

  • 46 Answers

SOURCE: 1993 Ford Explorer bogging down

This is not a bogging down problem if the engine is reving up it sounds like you have a very badley slipping tourk converter or you have a band in your tranny slipping and that is why you can go for a little while longer if you shut it off

Posted on Jan 10, 2009

  • 4369 Answers

SOURCE: 1998 Ford Explorer timing problem

FORD: 1997-2000 EXPLORER, MOUNTAINEER
ISSUE: A "knocking" noise at start up for up to 2 minutes from the left hand front chain cassette area may occur on some vehicles. After engine shutdown, the tensioner oil supply gallery empties. The noise may be due to air entering the left hand tensioner when the engine is restarted.
ACTION: Replace the left hand camshaft tensioner with a revised Tensioner Kit. Refer to the Instruction Sheet within the Tensioner Kit for service procedure details.
tx2605~us~en~file=caution.gif~gen~ref.gif WARNING: THE XU2Z-6K254-AA TENSIONER KIT IS FOR INSTALLATION ON THE LEFT SIDE OF THE ENGINE ONLY. INSTALLATION OF THIS KIT ON THE RIGHT SIDE OF THE ENGINE MAY RESULT IN ENGINE FAILURE. IF A TENSIONER IS NEEDED FOR THE RIGHT SIDE OF THE ENGINE, USE KIT XU3Z-6K254-BA.
PART NUMBER PART NAME XU2Z-6K254-AA Tensioner Kit - Left Side XU3Z-6K254-BA Tensioner Kit - Right Side

SECTION 303-01B: Engine — 4.0L SOHC 1998 Explorer/Mountaineer Workshop Manual
IN-VEHICLE REPAIR Timing Drive Components —LH Hydraulic Chain Tensioner Removal and Installation

  1. Remove the upper intake manifold. For additional information, refer to Intake Manifold—Upper in this section.
Intake Manifold —Upper Removal
  1. Disconnect the battery ground cable (14301). For additional information, refer to Section 414-01 .
  1. Remove the air cleaner outlet tube (9B659); refer to Section 303-12 .
  1. Remove the bolts and the accelerator control splash shield.
  1. Remove the accelerator cable (9A758) and speed control actuator cable (9A825).
    1. Pull up on speed control actuator cable to remove.
    1. Rotate the throttle body cam and remove the accelerator cable from the cam.
  1. Remove the screws, the accelerator cable and speed control actuator cable.
  1. Disconnect the RH upper intake manifold vacuum connection.
  1. Disconnect the idle air control (IAC) valve electrical connector.
  1. Disconnect the TP sensor electrical connector.
  1. Disconnect the engine vacuum regulator (EVR) and the variable induction system (VIS) solenoid electrical connections.
  1. Disconnect the crankcase ventilation hose (6853).
  1. Disconnect the power brake booster vacuum line.
  1. Remove the 12 bolts.
  1. NOTE: Inspect the O-rings and replace as necessary.
    Disconnect the LH fuel vapor management valve (VMV) hose.
  1. NOTE: Inspect the O-rings and replace as necessary.
    Disconnect the RH VMV hose and remove the upper intake manifold.
  1. Remove the thermostat housing. For additional information, refer to Section 303-03 .
  1. Remove the LH camshaft tensioner.
    • If using a new washer, tighten to 44 Nm (32 lb-ft).
    • If using the old washer, tighten to 67 Nm (49 lb-ft).
  1. Remove the pipe plug, and the oil volume reduction plug.
  1. NOTE: Be sure to install the new oil volume reduction plug supplied with the hydraulic chain tensioner.
    To install, reverse the removal procedure.
please rate as fixed if this helps you

Posted on May 03, 2009

  • 770 Answers

SOURCE: Ford Escape engine light on/blinking, faint knocking noise

If your check engine light came on when the problem occurred, then you need to have the diagnostic codes read. I am cheap, so I would suggest going to an Advance or Auto Zone, they will read the codes and interpret them for you in hopes of selling you the part that will fix it. Good Luck. I hope you find this very helpful!

Posted on Nov 22, 2009

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1 Answer

2004 Ford explorer engine knocking


take it to an accredited service shop that has experience on your make of engine and have a proper diagnosis done and quote
it is possible that there is a spinning main bearing and the test is a oil pressure test using a mechanical gauge
some times it spins , low oil pressure -knocking other times it stops and the oil pressure goes back up , knocking stops
should I be correct , normally it can be repaired in car by removing the sump and replacing that bearing shell, of the shaft is not damaged
i would steer away from a new engine or suggestions of a blown engine but it could be serious

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Make sure the oil level is good. The hydraulic tensioners for the chain work with the engine's oil. If low it will make a rattling/knocking like noise.

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im a tech. at my family auto shop, me personally am a harley davidson tech. but i own a 2004 4.0L explorer the noise that yours is making is most likely the cam chains.... they are known to stretch and make a noise.... the only down side to that is that you have to remove the engine and disassemble almost the hole engine to replace the chain.... i have 130k on mine and it makes the same noise so ill have to rebuild mine here soon sorry for the bad news

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The knocking noise is the key. Assuming the coolant level is correct, and the thermostat is working correctly, it sounds like you have a blend door actuator concern. If the knocking noise is coming from the center dash area, the blend door needs to be replaced. The radio and center trim will need to be removed, the blend door removed and the blend door needs to be manually moved to verify heat. Good luck.

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