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

[Les]

Hi, Russ,
	My standard solution for anything corroded is lots of liquid wrench,
and a little heat (not too much and no open flame as LW is flamable I
think.)

	There are some tools available from plumbing suppliers for removing
pipe sections that have broken off, but I suspect that the piece you are
working with is probably too far gone for those to be much help.

	I haven't done this work on Marine engines, but on Guam on cars and
other vehicles which is about the same thing (the island is only 5mi x
15 mi roughly and everything corrodes eventually).  Sometimes I would
use a hacksaw blade and cut the offending bit lenghtwise, but you run
the change of mucking up the threads.  If the original installation used
anti-seize, the LW will loosen and lubricate that, so the section may
just come out with some gentle persuasion on the visible end.  I have
occasionally been successful with notching the visible part, and using a
blade to act like a screwdriver to take it out.  But plumbers have a
tool that looks like two curved racheted jaws that will do the same
thing by gripping the inside of the pipe as you turn it with a socket or
T handle.

Regards,
Les H

On Thu, 2008-05-29 at 14:15 -0400, Duff, Russ (R.W.) wrote:
> Thanks for all of your replies so far. I went down to the boat over
> lunch to get a closer look and the part is the same as that show on
> the Torresen site. It turns out just the pipe has snapped. What type
> of pipe should I use, black gas pipe, galvanized exterior gas pipe,
> plumbing pipe, or something else? Also, is there anything odd about
> the threads, or are they standard NPT? (No, I’m not rebuilding
> everything with stainless, I just want to get it running). I removed
> the riser portion to take it home and remove the broken section from
> it, but I am not sure how I will get the piece out of the exhaust
> flange; it snapped off flush with the outside. Any hints? I tried to
> remove the flange but could only get one nut off. I didn’t want to
> strip anything so I will go back down this weekend with some PB
> Blaster, a torch, and 6 point sockets and wrenches (my 12 points
> wanted to strip the nuts).  Thanks again for the help.
> 
>  
> 
> Sincerely,
> Russ Duff
> Catalina 38, Hull #112
> "AVANTURA"
> Lake Erie
> Grosse Ile, Michigan
> RDUFF AT VISTEON DOT COM
> 
> AVANTURA AT COMCAST DOT NET
> 
> 
>  
> 
> 
>                                    
> ______________________________________________________________________
> From: listserve-bounces at catalina38.org
> [mailto:listserve-bounces at catalina38.org] On Behalf Of Duff, Russ
> (R.W.)
> Sent: Thursday, May 29, 2008 9:10 AM
> To: Catalina 38 Listserve
> 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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