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

[Tom T.]

Hi Russ,

I think I used galvanized pipe and I also had a problem getting the old manifold flange off.  PB Blaster is the trick. Soak it with PB, down a beer, soak it again, down another beer, etc until either the flange stud comes out or you pass out first.

  If you do break off that last stud, your life will become pure hell so let the PB do the work and take your time.  I soaked it over night and the next morning it was very easy to turn.  (no, I didn't drink all nite)

Tom T.




----- Original Message ----- 
From: Duff, Russ (R.W.) 
To: Catalina 38 Listserve
Sent: 5/29/2008 2:17:01 PM 
Subject: Re: [C38] Exhaust manifold exhaust flange on Universal 5424/M30.


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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