Exhast Leak / Wrap Material? - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 12 Old 04-30-2007 Thread Starter
Senior Member
 
1970Columbia34's Avatar
 
Join Date: Aug 2006
Location: Bay City, Mi
Posts: 319
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Send a message via AIM to 1970Columbia34 Send a message via MSN to 1970Columbia34 Send a message via Yahoo to 1970Columbia34
Exhast Leak / Wrap Material?

I think I have a exhaust leak, my exhaust is wraped with a white kind of 2" wide cloth. Here is a Picture...


From the discoloration in the wrap I think the leak might be there. If I take the wrap off the exhasut pipe is not solid it looks like a braided wire mesh maybe some type of flex.

I was thinking of using that stuff called Rescue tape Rescue Tape Self-Fusing Silicone Tape ~ The Ultimate Multi-Purpose Repair Tape! says it works up to 500 deg. Any tips?

Scott
1970Columbia34 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 12 Old 04-30-2007
Senior Member
 
Join Date: Sep 2006
Location: new england
Posts: 218
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Flex pipe sucks!
I haven't used that brand of tape, but have tried others. In my experience they all produce very foul smelling (and probably toxic) fumes...even if they are rated for high heat. Some smoke quite a bit too...it smells VERY bad.
An even bigger issue though is the locatioin of your exaust elbow on the engine. Cooling water is sent through the engine and out the exaust....if the leak is after the elbow it could flood the boat. From your photo though, it looks as if the coolant flows in that tube above the exahust pipe. Is there some sort of backflow prevention so it doesn't go back towards the engine?
My guess is that there IS water in there and it contributed to the degredation of the flexpipe.
Also....be careful with the muffler wrap cloth. Most of them contain crysalized silica which is VERY bad for your lungs.
southerncross31 is offline  
Quote Quick Reply Share with Facebook
post #3 of 12 Old 04-30-2007
Senior Member
 
Join Date: Jun 2006
Posts: 2,394
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 12
     
just be a bit careful taking that stuff off... depending on the age of the tape, it may just be asbestos.

We are not primarily on earth to see through one another, but to see one another through

Some people are like slinkies: not really good for anything... but you can't help laughing when you push them down the stairs
cardiacpaul is offline  
Quote Quick Reply Share with Facebook
post #4 of 12 Old 04-30-2007
Senior Member
 
soul searcher's Avatar
 
Join Date: Jun 2006
Location: Ft. Walton Beach FL.
Posts: 488
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
 
There really should be a hump in that piece. If its leaking exhaust gas I would think the stain would be more black Might just be rusting under the wrap that stuff will hold moisture. Does the pipe turn down on the other side of the bulkhead? there looks like some newer pieces in that system the nipple at the exhaust maifold looks new. and the water inlet looks more recent also.
what is directly above the pipe, can water drip down on it? Wen you took the wrap off was there a lot of soot staining or rust on the flex.
Could be that that part of the exhaust was redone and they reused the old wrap. the lack of black soot staining leads me to believe it is not leaking exhaust gas. but Iwould want to know for sure.
hope this helps

Matt
s\v Soul Searcher
Caliber 40LRC

All boats are sinking it's just a matter of how fast.

Last edited by soul searcher; 04-30-2007 at 10:09 AM.
soul searcher is offline  
Quote Quick Reply Share with Facebook
post #5 of 12 Old 04-30-2007 Thread Starter
Senior Member
 
1970Columbia34's Avatar
 
Join Date: Aug 2006
Location: Bay City, Mi
Posts: 319
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Send a message via AIM to 1970Columbia34 Send a message via MSN to 1970Columbia34 Send a message via Yahoo to 1970Columbia34
Yes on the other side of the bulk head the pipe does go down and then back up in a big loop before it exits the boat. I was guessing that was the source of the leak as I can't find one anywhere else. I can't visually see a leak anywhere I just know there is one since the CO2 detector goes off when we motor and it goes off much less if i let the blower run while motoring.

Scott
1970Columbia34 is offline  
Quote Quick Reply Share with Facebook
post #6 of 12 Old 04-30-2007
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
It could be exhaust backdrafting into the cabin. That is a pretty common problem on many boats. How do you know it is an internal leak??

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #7 of 12 Old 04-30-2007
Member
 
Join Date: Mar 2007
Location: RI
Posts: 33
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
The cloth covering is insulation. This is the section that is high temp as it is before the cooling water injection. I cannot tell if it is cast iron but many of these fittings are. You should remove the cloth and inspect the piece for corrosion and replace it if necessary and then wrap with new insulation material.
ollie820 is offline  
Quote Quick Reply Share with Facebook
post #8 of 12 Old 04-30-2007 Thread Starter
Senior Member
 
1970Columbia34's Avatar
 
Join Date: Aug 2006
Location: Bay City, Mi
Posts: 319
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Send a message via AIM to 1970Columbia34 Send a message via MSN to 1970Columbia34 Send a message via Yahoo to 1970Columbia34
I guess I am not sure if its back drafting for not but I assume it now since the CO2 sensor does not go off near as much when you run the blower while motoring. I am gathering that the wrap does not provide any type of sealing effect on that pipe? can you check for a exhaust leaks with soapy water before the motor warms up?

Scott
1970Columbia34 is offline  
Quote Quick Reply Share with Facebook
post #9 of 12 Old 05-01-2007 Thread Starter
Senior Member
 
1970Columbia34's Avatar
 
Join Date: Aug 2006
Location: Bay City, Mi
Posts: 319
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Send a message via AIM to 1970Columbia34 Send a message via MSN to 1970Columbia34 Send a message via Yahoo to 1970Columbia34
Ok well maybe this well help this is the sensor that is going off S-2A Propane and CNG Fume Monitor and Control from Fireboy-Xintex, it only happens while motoring and the propane valve on the bottle itself is shut off. It goes off and we just press alarm silence and then it goes awhile then goes off again. So its not even a CO2 detector its just a propane thing.

Scott
1970Columbia34 is offline  
Quote Quick Reply Share with Facebook
post #10 of 12 Old 05-01-2007
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
I believe diesel exhaust fumes can set off the Propane and CNG fume detector you have... you may want to contact Fireboy and double check that.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
adding a wrap bkw Racing 9 01-26-2007 01:57 PM
Shrink Wrap or Custom Cover? tomgee Gear & Maintenance 7 12-06-2006 09:30 PM
shrink wrap VS. no cover ddilman Gear & Maintenance 6 11-15-2006 10:28 PM
Yanmar Fuel Leak jnj Gear & Maintenance 3 07-19-2005 12:41 AM
rudder bushing material, loads Burnsy Gear & Maintenance 2 01-22-2004 06:36 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome