Old Hardin Exhaust Question
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Old Hardin Exhaust Question

  1. #1
    Junior Member dragboats.com's Avatar
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    Default Old Hardin Exhaust Question

    I have a '79 Beisemeyer, 21 foot, with Hardin water cooled exhaust manifolds with risers on them. I have been having problems with water getting into the cylinders when the boat is sitting in the water. Usually I anchor with the ass end of the boat towards the shore, so it can't be a wake problem.

    I know that the gaskets between the riser and manifold are leaking, as they are spraying out water when the engine is running. Not much, but they are definately leaking. Here's the problem. I am trying to get the two apart from each other so that I can replace the gaskets. What is the best what to separate these two pieces? Attached is a picture of the parts, if anyone can help, I would really appreciate it.

    Also, could this be causing my water in the cylinder problem. Yes the flappers on the transom are good, so that is not the problem.

    Thank in advance for you help.

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    Junior Member dragboats.com's Avatar
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    BTW, here is a picture of the boat for reference. Probably doesn't make any difference. Just curious if anyone knows what model this was.

  4. #3
    tintingsandiego krusn56's Avatar
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    Take your time...soak with penatrating oil. Get a couple metal putty spreaders. You can tap the old gasket in with the spreaders once they are soaked enough. Clean it till nothing but studs are left. Start to tap two at a time on one side(in the gap)...back and forth, one side then the other. Keep wet with the oil. They will start to loosen and come apart. These look like ford... I have a through bolt set for sale with new hardware and polish. They are the best ford log/snail combo. They dont leak and are easy to remove...
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  6. #4
    Junior Member dragboats.com's Avatar
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    How much do you want for them?
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    Ditch the gaskets and have the water jackets welded shut then surface the end and call it done! they all leak there after a while. mine never leaked again! my 02

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    One Free Call Does it All CP Performance's Avatar
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    I would start with the gaskets and stud kit and see if your problem still occurs.

    http://www.cpperformance.com/p-12953...t-4-34-od.aspx

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  9. #7
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    We had to use a little heat on mine to get them apart.

  10. #8
    "Try it Now!" Tahiti Boss21's Avatar
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    I used heat on mine too, and had the surfaces machined a little. New gaskets and it's been good for years now.
    1992 Eliminator Daytona 21'

  11. #9
    Horsepower sells Engines lefty's pride's Avatar
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    i had huge issues getting mine apart, i ended up cutting them a part and sending it to my machinist to get the bolts out as well as machining flanges. i talked to our hyd guy we use at work he said get the alum as hot as possible around the studs and submerge them under oil till cool (can be used). good luck you going to need it. on the gaskets mine where in there for 20 years and never leaked. on the water in the exaust if it is leak in to the center it could be the issue if ever thing is below water line. have you changed any thing in the last year as far as exaust/ cooling?
    edit: sorry on the spelling i was kinda rushing it
    Last edited by lefty's pride; 05-16-2010 at 11:04 AM.
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  12. #10
    AKA OhOneWS6 Last Mohican's Avatar
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    Quote Originally Posted by lefty's pride View Post
    ...i talked to out hyd guy we use at work he said for the next get the as hot as possible around the studs and submerge them under out till cool (can be used). good luck you going to need it. on the gaskets mine where in there for 20 years and never leaked. on the water in the exaust if it is leak in to the center it could be the issue if ever thing is below water line. have you changed any thing in the last year as far as exaust/ cooling?
    What????? Judging by the time of your post I'm guessing you had a few beers tonight.

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