[C38] Exhaust manifold exhaust flange on Universal 5424/M30.

[Tom T.]

Hello Russ,

It's been many years since I replaced my exhaust  but I seem to remember that the exhaust from engine to riser is just threaded pipe.  

I swore that if/when my exhaust fails again I will fabricate the pipe and riser from welded stainless.  In my opinion, iron and steel don't belong on a salt water cooled exhaust system but on the positive side, plumbing pipe sure is cheap if you don't also need to replace the iron riser and manifold flange.

I ended up replacing everything except the muffler from the engine exhaust manifold to the thru-hull in the aft anchor locker, including the rubber hose and check valve.  Only my muffler is original.

Tom Troncalli
Renata #95


----- Original Message ----- 
From: Duff, Russ (R.W.) 
To: Catalina 38 Listserve
Sent: 5/29/2008 9:11:04 AM 
Subject: [C38] Exhaust manifold exhaust flange on Universal 5424/M30.


It’s always something; at least it couldn’t have happened at a better time. We finally got the boat launched yesterday, and while pulling into the slip, the exhaust note changed and there was no water coming out of the exhaust. It turns out the fitting where the exhaust hose clamps onto the exhaust manifold snapped off. Luckily this is a separate part bolted on to the back of the exhaust manifold; the exhaust flange. My question is, is this a single cast part with a round opening/neck that the hose clamps onto, or is it a cast threaded part with a round opening that a pipe is thread into (1981 model C-38)? According to the Torresen website, it is a threaded opening.  Unfortunately, because it was late in the day, I couldn’t get a good look at it, but the neck didn’t seem to be as long as what is shown in Torresen’s picture. I am hoping that just the pipe snapped, and not the flange. It sure would be nice not to have to spend $81.07, plus shipping, and instead just go to the local hardware and buy a section of pipe. If it is just the pipe that snapped, what kind of pipe should be used? If anyone as any experience with this, please let me know.  Thanks. 
 
Sincerely,
Russ Duff
Catalina 38, Hull #112
"AVANTURA"
Lake Erie
Grosse Ile, Michigan
RDUFF AT VISTEON DOT COM
AVANTURA AT COMCAST DOT NET
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