Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > Exhaust System

Reply
 
Thread Tools Display Modes
  #26   IP: 24.152.132.140
Old 11-22-2018, 03:00 AM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 8,561
Thanks: 142
Thanked 1,232 Times in 821 Posts
Quote:
Originally Posted by rkohl44 View Post
If I plumb to the galley sink, does it matter where it connects (above waterline or below)?
No. Mine is inside the galley cabinet which makes it slightly above the static waterline. It's easier to work in there as opposed to lower. If it helps I can provide a picture on Saturday.
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
  #27   IP: 131.162.64.22
Old 11-22-2018, 01:35 PM
Peter's Avatar
Peter Peter is offline
Senior Member
 
Join Date: Jul 2016
Location: Nova Scotia, Canada
Posts: 178
Thanks: 55
Thanked 76 Times in 55 Posts
Agree that it does not matter above/below the waterline from a functionality perspective, but perhaps with an eye to safety, would it not be better to minimize connections below the waterline?

Peter
Reply With Quote
  #28   IP: 24.152.132.140
Old 11-23-2018, 08:37 AM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 8,561
Thanks: 142
Thanked 1,232 Times in 821 Posts
Quote:
Originally Posted by Peter View Post
Agree that it does not matter above/below the waterline from a functionality perspective, but perhaps with an eye to safety, would it not be better to minimize connections below the waterline?
Well, yeah but I think more important is the integrity of the installation whether above or below the waterline. Proper materials, good design and consideration of all factors make for a safe boat.
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others

Last edited by ndutton; 11-23-2018 at 08:04 PM.
Reply With Quote
  #29   IP: 99.55.124.54
Old 12-14-2018, 07:11 PM
rkohl44 rkohl44 is offline
Senior Member
 
Join Date: Feb 2017
Location: Northern California
Posts: 21
Thanks: 4
Thanked 1 Time in 1 Post
Neil: yes, please: pictures of your entire vented loop system would be fantastic. In fact, pictures of your entire exhaust system would be great too. The muffler I ordered a month-and-a-half ago has been on back order, but should ship next week.

Which brings up the next subject...gunk on the manifold. How do I get it off? The mating surfaces are not flush and I don't know how much leeway I have using the manifold and flange gaskets. How much tolerance do I have?
Attached Images
    
Reply With Quote
  #30   IP: 24.152.132.140
Old 12-14-2018, 08:05 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 8,561
Thanks: 142
Thanked 1,232 Times in 821 Posts
Here are a few pictures of some of my exhaust system components. The vented loop has no anti-siphon valve, it is truly vented. The second picture shows how the hose from the top of the loop attaches to the galley sink drain plumbing. The stainless check valve is located high in the port cockpit sail locker. The pictured external flapper is not my boat but I have the same thing.
Attached Images
    
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others

Last edited by ndutton; 12-14-2018 at 11:30 PM.
Reply With Quote
  #31   IP: 99.55.124.54
Old 12-31-2018, 02:39 PM
rkohl44 rkohl44 is offline
Senior Member
 
Join Date: Feb 2017
Location: Northern California
Posts: 21
Thanks: 4
Thanked 1 Time in 1 Post
detail on positioning new muffler

I got all the gunk off the manifold with sandpaper, so no worries there. Neil, can you post a picture or diagram of how you fit the Centek muffler in your boat? I think I have it figured out, but it is going to straddle the galley drawer space, with the hot side (in) under the drawer and the cool side (out) under the sink side. Is this how yours fit? Did you have to cut down either of the ports into the muffler?
Reply With Quote
  #32   IP: 24.152.132.140
Old 12-31-2018, 04:11 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 8,561
Thanks: 142
Thanked 1,232 Times in 821 Posts
My Centek is directly below the sink space to port of the engine. I did not need to cut anything for fit.
Attached Images
  
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others

Last edited by ndutton; 01-01-2019 at 04:23 PM.
Reply With Quote
  #33   IP: 24.152.132.140
Old 01-07-2019, 10:00 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 8,561
Thanks: 142
Thanked 1,232 Times in 821 Posts
Before it fails altogether

Well, that picture gave me the willies. I hadn't made a visual check on the hot pipe for a long time, just grabbed it and gave it a shake once a year. As long as it was still solid I rationalized putting its replacement off a little longer . . . and a little longer and a little longer.

The hot pipe is now 14 year old black iron in salt water and frankly looks like shi-shi. It is still solid but I'm not putting it off any longer. The new 316 stainless sched 80 hot pipe fabrication is complete (first picture), ready to install at the next opportunity. The second and third pictures are of the thread sealant I used. I'll report back after installation and some run time on how it worked out.

Name:  SS exhast hot pipe.jpg
Views: 114
Size:  87.7 KB
Name:  Thread sealant.jpg
Views: 113
Size:  110.9 KBName:  Thread sealant specifications.jpg
Views: 113
Size:  125.0 KB
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
  #34   IP: 72.218.163.249
Old 01-09-2019, 03:14 PM
alcodiesel's Avatar
alcodiesel alcodiesel is offline
Senior Member
 
Join Date: Oct 2015
Location: Norfolk, VA
Posts: 223
Thanks: 24
Thanked 45 Times in 36 Posts
Ooooo, stainless. You can't hide money, Neil.
__________________
Bill McLean
'76 Ericson 27
:valhalla:
Norfolk, VA
Reply With Quote
  #35   IP: 24.152.132.140
Old 01-09-2019, 08:21 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 8,561
Thanks: 142
Thanked 1,232 Times in 821 Posts
Quote:
Originally Posted by alcodiesel View Post
Ooooo, stainless. You can't hide money, Neil.
Do it right, cry once . . .
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
The Following User Says Thank You to ndutton For This Useful Post:
sastanley (01-11-2019)
  #36   IP: 24.152.132.140
Old 01-25-2019, 06:39 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 8,561
Thanks: 142
Thanked 1,232 Times in 821 Posts
Finished

The new stainless hot pipe is installed and working. The project was not without drama however. Removal of the old pipe uncovered coolant inside the dry exhaust path of the manifold so that initiated a week of pressure testing, manifold and block/head separately and careful inspection. A few emails to selected forum members with symptoms and test results walked me back from the cliff. With rock solid pressure tests we concluded the errant coolant must have come in through the aft manifold mounting stud during disassembly. There was some evidence supporting the conclusion too.

The first picture is the old pipe with old school asbestos heat wrap.

edit: Another slight modification I made was removing the mounting screws from the bottom flange of the Centek waterlift allowing it to move with engine vibration. The attached hoses on a Catalina 30 are supported close enough to their attachment on the waterlift that they keep it in place fine without formal mounting. The pictures don't show it but there is actually space between the waterlift base and the mounting pad on the hull.
Attached Images
     
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others

Last edited by ndutton; 01-27-2019 at 10:40 AM.
Reply With Quote
  #37   IP: 24.53.89.131
Old 01-25-2019, 07:23 PM
Peter's Avatar
Peter Peter is offline
Senior Member
 
Join Date: Jul 2016
Location: Nova Scotia, Canada
Posts: 178
Thanks: 55
Thanked 76 Times in 55 Posts
Hi Neil,

Very interesting to see this exhaust set-up. Thank you for posting the photos. Good to hear that you did not have to leap over a cliff with that coolant issue.

I am quite curious to hear what your experience is with that exhaust wrap. I tried a similar looking wrap when I re-did my hot section and it stank horribly. The smell was so bad I eventually replaced it with non-coloured wrap and the smell went away.

Best regards,

Peter
Reply With Quote
  #38   IP: 24.152.132.140
Old 01-25-2019, 07:30 PM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 8,561
Thanks: 142
Thanked 1,232 Times in 821 Posts
Yeah, it's stinking up the joint right now but we will see if it cooks off after a decent run. On the other hand, as long as things were opened up I also did some repainting in the area including a full prime and repaint of the manifold so both are contributing to the bouquet.
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others

Last edited by ndutton; 01-25-2019 at 08:46 PM.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Catalina Atomic 4 No Crank Problem Resolved Don Moyer Catalina 27 01-10-2013 11:20 AM
Water muffler questions rigspelt Exhaust System 19 06-24-2011 09:12 PM
Rather Different Muffler Design Bruce A Exhaust System 0 10-27-2008 02:22 PM
Lifespan of Water Life Muffler Kurt Exhaust System 10 10-04-2008 07:00 AM
Waterlift Muffler Manifold Connecion knitchie Exhaust System 1 06-29-2007 11:26 AM


All times are GMT -4. The time now is 02:40 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2019 Moyer Marine Inc.

All Rights Reserved