Next message: Richard Goodwin: "Re: lv-ab: Cast Iron Exhaust Repair"
Hi,
I have a friend who owns a 37 foot Benetau with a Perkins 4-107 that has a similar exhaust elbow. He removed the elbow and took it to a local machine shop that fabricated a new one using a smaller elbow inside the larger elbow. Both elbows were welded to the plate/collar that fastened to the engine exhaust manifold. A hole was drilled into the top of the larger elbow and that was used to thread a section of pipe (for the raw water). It worked out very well for him and cost was less than $300. I will say this, the local machine shop does a lot of work for the local mariners, so he knew how to improvise.
Regards,
Stan
S/V Ichiban
wrote:
Hello All,
I have a 4" cast iron 90º plumbing on my exhaust system that has coorded thru...It seems salt water comes back into the system to about this point......The casting doesn't get hot when running, the cooling water enters right above......One side goes to the Detroit Diesel 6v53. The other side is connected to the rest of the exhaust system with a flexable rubber tube that looks not too hard to remove. Once it is removed, the 1/2" hole leak is only about 3" in the fitting so the inside is acessable.
What are my options ? Take the entire 30" snaking weldment off and have it replicated ? (maybe $2500?) Take if off and have it welded or brazed (maybe $1500) ? Or maybe build up the bottom of this casting with Marine Tex Maybe ($500) ? I really like the Marine tex idea.....my mechanic is coming by friday to take a look......
Currently, I have stopped the sinking with some really good "silicone tape", you wrap it around, and it clings to itself very tightly. I came back from Catalina (4 Hours) and it held, though I didn't go past 65% power or so......THIS TAPE IS GREAT !
thanks for any ideas.....
BILL
"Steer Clear"
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