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Thread: Rod knock

  1. #1
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    Rod knock

    It's bad...A horrible sound I don't wish on any of your ears.
    I trailered the car from Joshua to Dallas and she's being diagnosed as we speak.
    Under 17,000 miles. Anyone else done this yet or am I the first?

  2. #2
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    Quote Originally Posted by 2003 MIB
    It's bad...A horrible sound I don't wish on any of your ears.
    I trailered the car from Joshua to Dallas and she's being diagnosed as we speak.
    Under 17,000 miles. Anyone else done this yet or am I the first?
    Sorry to hear that man! Hope it's not what it sounds like.
    Dean P. ~ Racerx88
    2004 Mercury Marauder 300A

    Silver Birch/Charcoal
    Dig Around in My Garage

  3. #3
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    Thanks Dean,
    Jared at J/E thinks that's what it is too. Carlos is looking at it now. It was strange how it happened- I wasn't driving hard or anything even close- just rolling down the road and it started knocking....very ugly.

  4. #4
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    harmonic balancer can sound just like a rod...maybe if you is lucky...willie
    ---------------------------------------
    2003 Marauder BLACK
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  5. #5
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    Quote Originally Posted by prchrman
    harmonic balancer
    I hadn't thought of that, Willie...Thanks, man.

  6. #6
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    Quote Originally Posted by 2003 MIB
    It's bad...A horrible sound I don't wish on any of your ears.
    I trailered the car from Joshua to Dallas and she's being diagnosed as we speak.
    Under 17,000 miles. Anyone else done this yet or am I the first?
    I'd call that a Hoover since is sucks so bad. I too hope it's not a bad valve guide. Just FYI too - overhead cams = no rods
    2003 Marauder 300eh - Stock

    Born: 12/03/2002
    Adopted 02/17/2003

    Trilogy #243

    AVIC D3
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    I can't drive 55. I'm looking forward to not being able to drive 75 ether.

  7. #7
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    Quote Originally Posted by Dr Caleb
    I'd call that a Hoover since is sucks so bad. I too hope it's not a bad valve guide. Just FYI too - overhead cams = no rods
    Sorry but almost all engines have rods that connect the pistons to the crankshaft. I think you meant to say "no push rods". A rod knock will be a very solid constant knock from inside the block.
    Dean P. ~ Racerx88
    2004 Mercury Marauder 300A

    Silver Birch/Charcoal
    Dig Around in My Garage

  8. #8
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    ...and it sounds REALLY nasty when that happens...

  9. #9
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    Quote Originally Posted by Logan
    ...and it sounds REALLY nasty when that happens...
    He's NOT kidding. I've been there twice myself. Keep us informed Dan, and let us know if you need any help with anything.
    Dean P. ~ Racerx88
    2004 Mercury Marauder 300A

    Silver Birch/Charcoal
    Dig Around in My Garage

  10. #10
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    Quote Originally Posted by Racerx88
    Sorry but almost all engines have rods that connect the pistons to the crankshaft. I think you meant to say "no push rods". A rod knock will be a very solid constant knock from inside the block.
    Ahhhhhh! I underconstumble! Those rods! (yea, I was thinking push rod)

    Oooooo, yea, that would sound like a gravel truck . .
    2003 Marauder 300eh - Stock

    Born: 12/03/2002
    Adopted 02/17/2003

    Trilogy #243

    AVIC D3
    SS Inserts.
    Metco Control arms and Watts link.
    QA1 8 way adjustable shocks and struts.
    Addco front and rear anti-roll bars.
    Wilwood front brakes.

    I can't drive 55. I'm looking forward to not being able to drive 75 ether.

  11. #11
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    Thanks guys but I'm fine. I feel pretty smart about a few of things:
    1) It's in Jared's hands. J/E can fix it.
    2) I didn't drive it. Eventually they break even uglier than they sound.
    3) When I rented the U-Haul and trailer, I took out every available insurance. A good friend had a bad experience with them.

    Dr. C.- I had the same discussion about pushrods on the phone yesterday with the S/A.
    " It sounds like a rod knock but I don't have rods.."
    " Connecting rods, Dan. It'll sound really nasty if that's it."
    " It sounds nasty- evil, broken, nasty."
    " It's broken. Bring it in."

    <Dan's quiet sobbing>

    -The End_

  12. #12
    I hope it's not a knock .wouldn't want to wish that on anyone .if worse comes to worse maybe start checking into a cobra motor.just a thought.

    Merc had a new installed in his mm.i dont remeber why .Merc?! MERC!?

  13. #13
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    There is one other thing...

    Why did it break? I understand over-revving and things coming apart...I was just driving down the street to the corner store and BAM!

    I change oil more often than I change socks...I change my mind about brands (Royal Purple, Amsoil, Motorcraft, Mobil 1) every time I read an oil thread...Just over 15,000 miles. I think I've done 7 oils changes.

    Okay here's the weird part...Did I somehow create a problem by changing the oil diet of my car? What else makes the connecting rod break?

  14. #14
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    Quote Originally Posted by 2003 MIB
    I change oil more often than I change socks...
    You must have some pretty pissed off shoes!!

    hehehe!

  15. #15
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    Dan, sorry to hear about the knock, a broken connecting rod would very loud and I don't believe due to changing oil brands. Possibly severe detonation or overevving combined with lack of lubrication.

    Most likely a flaw in the casting, or a rod cap came loose, seen that happen. the pin that connects rod to piston could also be the problem.

    Anyway without hearing the knock is all pure speculation, one thing I am sure about, I don't know if you have U/D pulleys; if you do and it is loose or over tightened, the dealer may want to blame the whole thing on them...be careful. Javier.
    Smokie
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