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  1. #1
    Doo It Till It Hurts! holdnon72's Avatar
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    Frozen Manifold 4-Tech (Non Supercharger)

    I though I had my 06 Sea doo Sportster all winterized but then I found this forum. I never flushed antifreeze through my exhaust system. I'm worried That the exhaust manifold had some water inside the water-jackets and froze. Could I have damaged the manifold? Could there be cracks inside? The tempature got up to like 45* here so all the hoses on the exhaust system thawed so I drained them. When I disconnected the larger bottom hose on the manifold no water came out. When I disconnected the smaller bottom hose on the manifold a little water came out but not much at all. Can some water be trapped in the water jackets of the manifold? Should I remove the manifold and inspect it for cracks before I attemt to start the boat on the hose? Sorry for all the questions I just want to be sure the manifold is ok before I run it on the hose. Thanks for any info


  2. #2
    EZ Dock of Long Island Shibby1485's Avatar
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    don't worry about it. It'll be fine

    The supercharged and intercooler motors are the troublesome ones. It's good practice to put antifreeze in yours, but not an alarming problem if you didn't.

  3. #3
    Doo It Till It Hurts! holdnon72's Avatar
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    Thanks For Your Quick Reply!

    Thats good news! Is this the location where I can add the 100% antifreeze if I just wanted to fill the exhaust manifold? Thanks for all the help Heres a photo of the water jackets inside one of the 4-tech manifolds....As you can see in the photo the lower side of the manifold would self drain but it's the back top that had me worried. Looks like some water could lay inside that area but I guess it's enough to cause a stress crack. Thanks for the info
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  4. #4
    Doo It Till It Hurts! holdnon72's Avatar
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    Antifreeze Fill Loaction on Manifold

    The loaction i was referring to is the elbow on the top right hand side of the manifold.

  5. #5
    Banned User
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    where are you located?

  6. #6
    Doo It Till It Hurts! holdnon72's Avatar
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    Southern New Jersey

    I'm about 5 Miles from Capemay

  7. #7

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    i've had 4tecs since they came out, i have never flushed or winterized i leave them outside in -8 cos the engine is closed loop with antifreeze, providing you run the engine to discharge the exhaust water after use, then there is'nt enough water in the exhaust to expand when frozen to do any damage, that goes for your boat, regards bill

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