1. for access to reviews and discussion of the 2016 and 2017 Ford Explorer, Tech Tips, How to Articles, Off-Road Modification, Events, and more!

    Register Today It's free! This box will disappear once registered!

2004 Explorer 4.0. Timing chain tensioners.

Discussion in 'Stock 2002 - 2005 Explorers' started by cbexplore, May 16, 2010.

  • Searches ExplorerForum.com
    1. cbexplore

      cbexplore New Member

      Joined:
      May 16, 2010
      Messages:
      42
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      saint Louis Missouri
      Year and Model:
      2004 Explorer XLT V6 4x4
      I read through the forums here about replacing my rear timing chain tensioner, as I have the deadly rattle others have experienced. I replaced the passenger side rear tensioner (could not believe how easy that one was)
      but I still have the rattle. I would like to replace any others tensioners required but didnt see specifics for the 2004 Explorer SOHC v6 4.0 4x4.
      I need to determine how many my engine may have, where they are located, and how to replace them.
      Thanks for any help.
      CB
       
    2. Support EF


      Join the Elite Explorers for $20 a year

      Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose and fix problems yourself, and learn which modifications work without having to experiment on your own. Elite Explorer members see practically no ads, add your own profile photo, upload photo attachments directly to your posts and Media Gallery, create more private Conversations, and more. Join Today. Your support is greatly appreciated.



      to hide adverts.
    3. 2000StreetRod

      2000StreetRod Staff Member Moderator Elite Explorer

      Joined:
      May 26, 2009
      Messages:
      10,015
      Likes Received:
      10
      Trophy Points:
      68
      City, State:
      Greenville, SC
      Year and Model:
      00 Sport FI,03 Limited V8
      2nd hydraulic tensioner

      You should have another similar but longer hydraulic chain tensioner on the left head near the front on the inner side. On my 2000 the upper intake manifold must be removed. I'm not familiar enough with your intake manifold (which is different) to know if it must be removed. If your intake is like the one shown below I suspect it must be removed to access the tensioner.
      04Intake1.jpg
       
      Last edited: May 16, 2010
    4. cbexplore

      cbexplore New Member

      Joined:
      May 16, 2010
      Messages:
      42
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      saint Louis Missouri
      Year and Model:
      2004 Explorer XLT V6 4x4
      Thanks 2000StreetRod
      I used your walk through to replace the other tensioner.
      We have had some bad weather lately so I have been able to do anything.
      The rattle does seem to have quieted some from the other replacement.
      Hopefully the drivers side fixes it.
       
    5. BrooklynBay

      BrooklynBay Staff Member Moderator Elite Explorer

      Joined:
      November 11, 2005
      Messages:
      50,937
      Likes Received:
      22
      Trophy Points:
      58
      City, State:
      Brooklyn, NY
      Year and Model:
      88 89 93 95 96 Aerostars
    6. cbexplore

      cbexplore New Member

      Joined:
      May 16, 2010
      Messages:
      42
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      saint Louis Missouri
      Year and Model:
      2004 Explorer XLT V6 4x4
      Thanks 2000StreetRod your accurate description led me right to the part. :salute:
      Thankfully the engineers got smart and the 2004 V6 Explorer SOHC doesnt require manifold removal to get to it....its right in your face!...easy access with basic tools...I am changing it now and will post the results.
       
    7. cbexplore

      cbexplore New Member

      Joined:
      May 16, 2010
      Messages:
      42
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      saint Louis Missouri
      Year and Model:
      2004 Explorer XLT V6 4x4
      Replaced the front tensioner ....still a slight rattle....but havent highway driven... I assume this means replacing the chains and guides?
       
    8. cbexplore

      cbexplore New Member

      Joined:
      May 16, 2010
      Messages:
      42
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      saint Louis Missouri
      Year and Model:
      2004 Explorer XLT V6 4x4
      Dang Dang

      Well thought I could get a few more miles but now the engine is losing oil pressure to the top of the motor. I had a top end flush done on it but it didnt help. Pressure gage says all is well but the extremely loud dry noise says the ports or something is clogged and not getting oil.
      Looks like 5,000.00 for a new motor is the only solution now. :mad:
       
    9. 2000StreetRod

      2000StreetRod Staff Member Moderator Elite Explorer

      Joined:
      May 26, 2009
      Messages:
      10,015
      Likes Received:
      10
      Trophy Points:
      68
      City, State:
      Greenville, SC
      Year and Model:
      00 Sport FI,03 Limited V8
      Pull the valve covers

      If you've changed your engine oil and filter at the recommended intervals I doubt that you have an oil pressure problem. You're probably hearing timing chain rattle. If you remove the valve covers you can determine if the left and right chain guides are broken. Only a broken rear guide requires engine removal to repair.
       
    10. cbexplore

      cbexplore New Member

      Joined:
      May 16, 2010
      Messages:
      42
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      saint Louis Missouri
      Year and Model:
      2004 Explorer XLT V6 4x4
      Thanks 2000StreetRod its worth checking before I blow my savings :D
       
    11. Gene64

      Gene64 New Member

      Joined:
      December 30, 2014
      Messages:
      3
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      RI
      Year and Model:
      2004 Ford Exp. Sport Trac
      Timing Chain Tensioner

      2000StreetRod, I am a woman and I do know how to work on my truck. But this is new to me. Can you tell me where to find the timing chain tensioners, I have such a rattle and I am sure that is what it is. I have a 2004 Ford Explorer Sport Trac 4X4, V6. Can you tell me how to remove the timing chain cover? Kathie
       
    12. BobRob

      BobRob Member

      Joined:
      March 3, 2015
      Messages:
      81
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      Loudon NH
      Year and Model:
      2002 Explorer
      Here's a great thread that goes into detail about this rattle.

      http://www.explorerforum.com/forums/showthread.php?t=163298

      I'm starting to experience it now but mine seems to be coming from the front as described in the thread. I'm pretty sure it's the primary tensioner, but will be pulling the valve covers next weekend to confirm.
       
    13. cbexplore

      cbexplore New Member

      Joined:
      May 16, 2010
      Messages:
      42
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      saint Louis Missouri
      Year and Model:
      2004 Explorer XLT V6 4x4
      Unfortunately this is an issue with 6 cylinder Explorers because they use plastic...I replaced my tensioners on the rear and it didn't help.
      The only way to replace everything is to pull the motor. If its the front then it can be replaced without pulling the engine.
       
    14. 2000StreetRod

      2000StreetRod Staff Member Moderator Elite Explorer

      Joined:
      May 26, 2009
      Messages:
      10,015
      Likes Received:
      10
      Trophy Points:
      68
      City, State:
      Greenville, SC
      Year and Model:
      00 Sport FI,03 Limited V8
      My Helpful Threads

      I'm not familiar with the Sport Trac but I suspect the intake manifold and valve covers are different from my 2000 Sport. However, the long block should be the same. Click on the "My Helpful Threads" link in my signature for a list of timing chain related threads.
       
    15. Gene64

      Gene64 New Member

      Joined:
      December 30, 2014
      Messages:
      3
      Likes Received:
      0
      Trophy Points:
      0
      City, State:
      RI
      Year and Model:
      2004 Ford Exp. Sport Trac
      Well my truck died on me and now has to go to the shop. Can you tell me do they have to pull the engine for the front timing chains? I don't want to get ripped off because I'm a woman, if you know what I mean and I'm sure you know that this is 75% true or even slightly higher. I was told that it had to be removed and then I read above that only if it is the back, that it has to be removed. Also, since I'm going to do this, can you tell me how to replace and easiest way to replace the fuel pump? Take off the bed or drop the tank? :) Oh, can you give me a quote if you can on the timing chain repair? That would help even if it is an estimated one, I have been given one and now calling 2 others to check. Thank you if you can and for your time in answering my questions.
      Kathie
       
    16. 2000StreetRod

      2000StreetRod Staff Member Moderator Elite Explorer

      Joined:
      May 26, 2009
      Messages:
      10,015
      Likes Received:
      10
      Trophy Points:
      68
      City, State:
      Greenville, SC
      Year and Model:
      00 Sport FI,03 Limited V8
      front cassette

      The front cassette (guide assembly, chain and sprocket) can be replaced with the engine in the vehicle.
      7U3Z-6A257-A.jpg
      Around 2004 the head casting was changed so it is almost impossible to remove the guide assembly without damaging it unless the head is removed first. However, if the guide assembly has failed it doesn't matter if it is damaged further by removing it. Some forum members have been able to force it out with the head in place but I doubt that a professional shop would do it. If the head is not removed then the new guide assembly has to be taken apart to install it. Only the new guide assemblies can be taken apart because the pivot pin is held in place with a circlip instead of being pressed. Removing the head according to shop procedures requires the use of a special valve spring compression tool.
      ST-103a.jpg
      Timing the camshafts requires a special tool kit.
      OTC6488Kit.jpg
      Since the replacement and timing process is labor intensive, requires special tools and knowledge it is usually expensive and many mechanics are not experienced with the process nor do they have the tools. Forum members have posted labor estimates ranging from $800 to $2,000. OEM parts are not cheap. The front cassette costs about $100. Some other parts are head gasket, valve cover gasket, timing cover gasket and crankshaft seal, balancer bolt. Aftermarket parts are less expensive but frequently inferior. A cost compromise between OEM quality and imported junk is Cloyes or Borg Warner cassettes.

      I suggest that you ask each shop for a detailed parts and labor estimate. Also ask for proof that they have the required special tools and have actual experience performing the replacement. Your engine is an interference engine. Even a shop with the required tools but no experience can time the camshafts incorrectly which may result in valves being struck by the pistons on engine start after repair.
      3Dings.jpg

      There are numerous threads on this forum about replacing the fuel pump. Some members drop the tank (what I did) and some cut a hole for access which I suspect no reputable shop would do.
       

    Share This Page








    We Support Our Troops!