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upper intake

  1. A

    EGR Valve to Upper Intake Bolt Size and Thread Pitch

    Hey guys! I was hoping that some would know off the top of their head or if they happened to have the bolts that mount the intake tube to the EGR valve. It's a 98 4.0 OHV. When I purchased my vehicle it had incorrect sizes and is currently leaking. To clarify this is the tube that enters the...
  2. D

    removing upper intake to access the camshaft position synchro

    I need to replace the synchro at the back of my 1995 4.0 engine. This issue is well documented here I know BUT........I cannot get to the camshaft synchro because of its location. I want to remove upper intake. I cannot find a thread that covers the removal of the intake. I found video on YT...
  3. K

    Difficulty removing Fuel Injectors (Images)

    What's up guys, it's been a while since I've posted. I recently had to replace my alternator and since I was under the hood and I had a vacuum leak in my upper intake manifold I decided to change it out for a new one. Needless to say one thing lead to another and since I had the upper intake...
  4. R

    Cant remove plenum - stuck on EGR tube? 99OHV

    once everything is disconnected this should just lift straight up...right? This EGR tube is not moving...I know from reading the "Lower intake removal" sticky that there is a washer in there, but am afraid to snap the plastic plenum yanking on it. Wont budge. Any suggestions - I...
  5. J

    4.0 OHV upper intake delaminating or coming a part?

    i was replacing the gaskets for the upper intake and under the fuel rail and i noticed It looks like the plastic upper intake on my 1998 Explorer sport V-6 4.0 OHV engine is coming a part can i patch it or do i have to replace it i dont even really know if it is part of the vacuum leak problem...
  6. J

    4.0 OHV upper intake delaminating or coming a part?

    i was replacing the gaskets for the upper intake and under the fuel rail and i noticed It looks like the plastic upper intake on my 1998 Explorer sport V-6 4.0 OHV engine is coming a part can i patch it or do i have to replace it i dont even really know if it is part of the vacuum leak problem...
  7. G

    Plastic upper intake leak v6 4.0

    Hello to everyone. I just joined in order to shed some light on a issue I had to figure out myself and post it here in case it helps someone else down the line. I spent days researching PO171 and PO174 lean bank 1 and lean bank 2 problems. I pulled codes and here is what happened in the next...
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