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Bent Valves?

Discussion in 'Stock 2002 - 2005 Explorers' started by Mckenzie, June 1, 2019.

^^Searches ExplorerForum.com^^





  1. Mckenzie

    Mckenzie New Member

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    I just took my 2002 Explorer limited 4.6l through a small pond and flooded my intake with water. The engine died and like an idiot I tired to start it. We finally got the engine running and idling, but now there is a clacking sound. Does this mean I will have to replace a rod or two? (It doesn't really sound like a knock to me) is it even worse with a valve job? I am very confident in my mechanical skills and will be doing all the work my self. I just need some help to narrow down the problem
     
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  3. Mbrooks420

    Mbrooks420 High Voltage. Elite Explorer EF Vendor

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    The damage was probably done when it stalled. No way to tell the damage without tearing into the motor. Bent rods don’t always sound terrible. Typical rod noise is usually bearing related, and not from being bent.
     
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  4. boominXplorer

    boominXplorer Elite Ranger Elite Explorer

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    On modular motors when the rods bend the Piston skirt will hit the counterweight on the crankshaft. You're probably better off getting another motor.

    The heads and valve train will be just fine / steam cleaned.
     
  5. Mckenzie

    Mckenzie New Member

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    I've done a few rebuilds before on my own time, so I don't really have a problem tearing into the motor myself. I've yet to see the modular V8 apart and I've been really wanting to ahaha. Would it be easier to just find a running 4.6 or even 5.0 and drop in? I'm thinking rods are an easy enough job. It's the whole other slough of problem that gonna come from this knock. (Like a new crank too)
     
  6. Mckenzie

    Mckenzie New Member

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    At some point I will be modifying this thing through the roof and need good base internals to start anyway.
     
  7. shucker1

    shucker1 Elite Explorer

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    5.0L will not bolt up to you 4.6L transmission.

    PCM would have to change if it did.
     
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  8. Mckenzie

    Mckenzie New Member

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    I've been planning on doing a manual swap for some time as well. Mind you all of this was for the 4.6, I'll probably need to do more research now. I was kinda hoping the tranny would have gone first but I guess whatever it takes to actually get me to start this build.
     
  9. shucker1

    shucker1 Elite Explorer

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    Look for a thread by @2000StreetRod

    I think he put a supercharger on a 4.6 from an Aviator.
     
  10. Mckenzie

    Mckenzie New Member

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    Yeah that was definitely the plan as well. There is room for the vortech with and electric fan conversation. And people have even got the Eaton m112 to "bolt up". But that's for another day ahaha. I need to make sure the internals are solid before anything.
     
  11. shucker1

    shucker1 Elite Explorer

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    Every good engine starts with a good base.

    Too many folks think they can bolt stuff on an old engine and make it go fast just to be disappointed when it grenades on them.
     
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  12. Mckenzie

    Mckenzie New Member

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    Exactly. The motor has 240000 km on it so it's seen quite a bit of life. Would it be cheaper to rebuild what I got or buy a motor from scrap and build that one up?
     
  13. Mbrooks420

    Mbrooks420 High Voltage. Elite Explorer EF Vendor

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    Start with a new motor, and stick with the 4.6.
     
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  14. shucker1

    shucker1 Elite Explorer

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    If you start with a scrap yard engine you don't know what it has been through. You could be buying a bag of "Rocks".

    How long have you had your rig and has it been well taken care of?

    So you know what it has been through..

    Like my 98 (If I ever finish...) I'm the original owner. My 4R70 transmission will go to the builder and I will get "My" case back rebuilt.

    The truck has never even been through a mechanical car wash.

    I hate them... I know what they can tear up.

    I used to work at one and they are just glorified paint and attachment strippers.

    I realize you may be on a budget but remember "You pay peanuts, you get Monkeys".
     
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  15. shucker1

    shucker1 Elite Explorer

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    P.S.

    Lots of smart members around here we will try and help you along which ever route you decide to take.
     
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  16. Mckenzie

    Mckenzie New Member

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    That's great to hear! I have been reading alot on here and have already learned some much. This place is just a well of fantastic resources. This is the first time I've posted and I'm glad I did.

    I've only had it 4 years not driving it very often but I think deep down I always knew it was gonna need some (alot) of work at some point.

    When I said small pond we had been mudding all day already, the pond was deeper than I expected and flooded my intake. We were going pretty fast too.

    I'm going take the time and money to do this right. I really just don't want to buy a new engine lol
     
  17. boominXplorer

    boominXplorer Elite Ranger Elite Explorer

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    A bent rod can damage the cylinder wall severely to where it needs to be sleeved or the block is unusable. Might not be that bad but I wouldn't count on your block being repairable.
     
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  18. shucker1

    shucker1 Elite Explorer

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    As what @boominXplorer said.

    But I would suggest pull it crack it open and see what you have to work with before you march out and buy a new \ used block.

    You might be surprised..
     
  19. Mckenzie

    Mckenzie New Member

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    I was going to drop the oil pan first and see what's going on inside. But, I guess if I'm going to swap it in the long run I should just start with pulling it.
     
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  20. Mckenzie

    Mckenzie New Member

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    If I was going to swap the motor and transmission anyway. I was thinking of buying a body scrapped manual f-150 and swapping the whole drive train. Does anyone know if the 4.6l are any different in the f150.
     
  21. shucker1

    shucker1 Elite Explorer

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    Pop the pan first and see what it looks like.

    Not sure if you can get the pan out without jacking the engine.

    If you get the pan out and you can see a rod that looks like a banana then you can start your plan.

    If not then you can change Tack and shoot for a different target.
     
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