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F20B bottom end

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    #1

    F20B bottom end

    I do not know what to torque my rod bolts down to on my f20b. They are stock. Does anyone know the spec? I have been able to find any info
    Tags: None
    #2
    All I know is the f20b has a 85x88 bore to stroke and the f22a has a 85x90 bore to stroke.

    The f20b runs at 11.1:1 and the f22a runs 8.8:1.

    If your running f20b internals you should go with their specs.

    Vice versa. Given If they all fit and if you plan being stock.

    If the rods are aftermarket I would give them a call and see what they advise.


    I'll give you an update on what my Haynes manual says for oem torque specs for the f22a when I get home.

    Edit: there are no Haynes manuals on the f20b, people say ( don't trust me on this ) but they've used h23 arp bolts and specs and it works.

    Some also say its equivalent to f23 specs.

    All in all do more searching and buy arp bolts to play it safe.

    Bolt stretch on stock studs and bolts will kill you.
    Last edited by MrMagnificent; 10-04-2013, 01:33 AM.

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      #3
      Well I got the rods done by any chance you know f20 main bolts spec to?

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        #4
        Searches are pulling up

        Connecting rods 37-38 lbs

        Main bearing caps 55-61

        And head bolts at 80.

        I'm not responsible for any damage lol.

        Always double check reliable sources for accuracy.

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          #5
          The head bolts are 72.3 I used the same as the h22. I asked of rod bolts cause they unique.

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            #6
            The rod bolts are torqued to the same specs as h22 as well
            NEW CB



            old Darkcloud : 1990 Accord EX MRT

            new
            DARKCLOUD : 90 ACCORD EX MRT

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              #7
              You may also want to check into the F20A's DOHC specs as well (they are pretty much the same bottom end, even as far as the water jackets).
              The CB7 Collector.
              Team Kindred Impulse Member #3
              92 LX Coupe F22A1
              2013 Toyota Corolla S
              92 EX Sedan F22A1
              Originally posted by deevergote
              Do you really need to make a thread asking if having your car like this /---\ will cause uneven tire wear? Try walking like that for a few weeks and see if your shoes wear funny! (hint: they will.)

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