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So much for Imco exhaust & salt water-pics included

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Old 07-25-2004, 11:25 AM
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Default So much for Imco exhaust & salt water-pics included

Well, looks like another 10 grand for me!!! I started to notice a lot of steam out the exhaust, then some blue smoke. I took off my risers and water passages are corroded and evidence of water dripping back into motor. There is supposed to be Inconel exhaust valves, but I doubt it because of the scumbag person who did the work. Could I have tulipped a valve and that is the reason for the smoke?? Can the heads be removed without pulling the motors once the exhaust is off? I can't stand the thought of having to pull these motors again!!!
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So much for Imco exhaust & salt water-pics included-2004_0725exhaust0008.jpg   So much for Imco exhaust & salt water-pics included-2004_0725exhaust0005.jpg   So much for Imco exhaust & salt water-pics included-2004_0725exhaust0004.jpg  

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Old 07-25-2004, 11:49 AM
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Default Re: So much for Imco exhaust & salt water-pics included

What boat is it? You should be able to pull the heads without any problem. Go buy a set of Lightning stainless headers. They'll take the salt fine but just like everything else they must be flushed. Headers for a Bravo boat will run around $2,500. Are you getting water in your oil?
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Old 07-25-2004, 11:51 AM
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Default Re: So much for Imco exhaust & salt water-pics included

Ok they're cheaper than I thought and they're great headers.

http://www.boatheaders.com/headers.htm
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Old 07-25-2004, 11:54 AM
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Default Re: So much for Imco exhaust & salt water-pics included

No water in oil. The boat is a 31 Sonic.

Thanks for the link.
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Old 07-25-2004, 12:10 PM
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Default Re: So much for Imco exhaust & salt water-pics included

Blue smoke= oil burning. With leaky exhausts, valve stems corrode, ruin seals, stick valves, possibly flatten cam lobes, etc. Also, the salt water could have corroded the cylinder walls and ruined the rings. This sounds serious. Pull the heads like Lofty said.
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Old 07-25-2004, 12:46 PM
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Default Re: So much for Imco exhaust & salt water-pics included

I've got about 10 hrs on the boat so far this yr. so hopefully the damage is limited.
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Old 07-25-2004, 12:54 PM
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Default Re: So much for Imco exhaust & salt water-pics included

THAT SUCKS
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Old 07-25-2004, 01:07 PM
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Default Re: So much for Imco exhaust & salt water-pics included

Thats what I would do, pull the heads. Drain the block 1st on each side to avoid a big mess. From there you can rotate the engine and check out each cyl wall. If not too bad, do the heads and put it back together for the rest of the season. We only have another couple of months left! Good luck.
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Old 07-26-2004, 02:57 AM
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Default Re: So much for Imco exhaust & salt water-pics included

Pull the exhaust in the boat and visually inspect the exhaust valves. If water was getting in, you will see some rust, pitting and corrosion on the valves.
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Old 07-26-2004, 06:43 AM
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Default Re: So much for Imco exhaust & salt water-pics included

How much time do you have on the exhausts??
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