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piebuss

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Posts posted by piebuss

    painting engine

    in TechTalk

    Posted

    Assume you're talking about the exhaust elbow, otherwise where did all the water come from???

     

    Our elbow is stainless, and in pretty good nic. The exhaust manifold is what I was referring to. It's just surface rust by the look of it, so I'm going to wire brush down and paint over it.

    It seems to be cooled by the engine coolant, so that should keep the temp down quite a bit. 

     

    Anybody know where you can get the Lehman (or Lee's) red engine paint?

    Heat Exchange Anode

    in TechTalk

    Posted

    Thanks mate.

     

    Yes, there's one on the transmission heat exchange, which is working overtime.

    There's only one on the engine/coolant heat exchange, which is the one that's got me worried. If that anode is not under water it won't be working correctly right? Therefore while the boat is sitting idle, only the transmission heat exchange is working??? 

     

    Re the S bend, that's just my musings regarding the above (i.e. if the fact the anode is not in water is a problem, how do I rectify that). If I'm wrong about the anode needing to be wet, and it will work perfectly fine after the raw water drains away, then the S bend question goes away. But if the anode is meant to be wet by design, then surely this design feature is more important than the design of the raw water hose after it exits the heat exchange???

     

    Appreciate the help guys.

     

    Woody 

    Heat Exchange Anode

    in TechTalk

    Posted

    Hi fellas

     

    I went to replace the anode on my heat exchange on the weekend and it was in pretty good nic. After about 9 months I would expect it to be nearly gone, but it was mostly intact, with only a little bit of corrosion.

     

    I've been thinking about it a lot now, and now I've convinced myself that the anode is sitting in a bit of an air pocket. It's at the forward end of the heat exchange, which is on a bit of a tilt (less than 10 degrees, but more than 5), and when I pulled it out I'm pretty sure (but my memory's sketchy on this point) that it was dry. Definitely no water came out the hole, but that could have been due to it sucking air in while the water drained out the exhaust elbow.

     

    So, I was hoping there was someone with some experience with these things on here. I'm thinking it may need two things done;

     

    1. The raw water exits the aft end of the exchange into the exhaust. Once it's in the exhaust piping, it would be free to drain out, so thinking some form of S bend in the exit pipe is necessary. Am I right to think this just needs to dip below water level, then up to the elbow to stop the water draining out?

     

    2. The heat exchange is about 1m long (it's a beast). Any air will naturally head to the top (forward) end, so am considering removing the aft cap and having this modified to take an extra anode. Anybody see a problem with this? Would it need to be build up to receive a new threaded hole?

     

    It's a Lee's Ford 120hp. No, I have not installed an inboard on the Piedy, it's on an old Kauri chugga.

     

    Woody

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