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
  #1   IP: 71.62.244.200
Old 09-19-2013, 12:26 PM
mtnsailor mtnsailor is offline
New Member
 
Join Date: Oct 2011
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
Exhaust (hot) leaks @ manifold nipple- 1972 A4

My 1972 original A-4 (in a Morgan 30) leaking before muffler (temp. patches with hose clamps got us through summer). A mechanic is assisting--photo attached- concerns: 1) manifold exit appears a 1.25" iron nipple screwed in- so, many questions on its removal (after old pipe is cut from muffler & manifold is unbolted from the block). Pictures we see of A-4's exhaust systems appear to show a removable flange with 2 bolts into the manifold (like my Palmer engines); but on mine, just a very corroded nipple. The mechanic is expecting to need a new exhaust manifold. (?)
2) possible to purchase a strong-enough, Stainless-steel 1.25" dia. flex. hose to replace this Exh. piping from Manifold to muffler (~5.75" long and 2.25" of offset)?

Possible useful info: this A-4 was overhauled by Moyer M.Inc. in 2005 (owned then by Stuart Tuller; S/V= Nuage; Rhode River)
Thanks, John Reeves Mathews, Va.
Attached Images
 
Reply With Quote
  #2   IP: 161.213.49.150
Old 09-19-2013, 05:14 PM
JOHN COOKSON JOHN COOKSON is offline
Afourian MVP, Professor Emeritus
 
Join Date: Nov 2008
Posts: 3,500
Thanks: 54
Thanked 855 Times in 629 Posts
Any chance of cutting the pipe off at the manifold and buying a flange from MMI? The flange will be theaded for 1 1/4" pipe. You might not even have to take the manifold off the engine.

Maybe I'm not understanding all the ins and outs of the issue here..........

TRUE GRIT
Reply With Quote
  #3   IP: 99.124.190.130
Old 09-19-2013, 05:35 PM
Al Schober's Avatar
Al Schober Al Schober is offline
Afourian MVP
 
Join Date: Jul 2009
Location: Uncasville, CT
Posts: 2,002
Thanks: 16
Thanked 578 Times in 405 Posts
John,
Not sure what you've got there under all the corrosion, but not much looks like its worth salvaging. You may be able to save the manifold, but paying a mechanic will make replacing the manifold cost effective - doesn't take too many manhours to equal the cost of a new manifold.
What's that thing on the left in the photo? I see the exhaust coming in and a rubber hose which I assume is water out of the manifold. Do the two ever mix or is that just a jacketed pipe? I doubt if it's actually a muffler.
What would help is a sketch of the whole system, elevation and plan view. Where is this engine in the boat? Any room for a water lift or a Tartan-style mixing can?
Reply With Quote
  #4   IP: 74.78.27.200
Old 09-19-2013, 08:37 PM
BunnyPlanet169's Avatar
BunnyPlanet169 BunnyPlanet169 is offline
Afourian MVP, Professor Emeritus
 
Join Date: May 2010
Location: York, ME
Posts: 952
Thanks: 25
Thanked 94 Times in 67 Posts
Hmmm

I don't know that the manifolds were ever directly threaded, isn't there always a threaded exhaust flange that bolts on? They are almost sacrificial (as this photo seems to show.) I can imagine I see a exhaust flange just to the right of the double hose clamp. It may be missing bolt heads from the rather spectacular corrosion.

You might try cutting the pipe, remove the manifold from the block, and try to make the rusty flange come loose... I had mine faced in a machine shop for $20 and installed 2 helicoils. But I was doing all the work.

I'm with Al, though... If you can't see some quick progress, a new one will be more cost effective.
__________________
Jeff


S/V Bunny Planet
1971 Bristol 29 #169
Reply With Quote
  #5   IP: 174.94.35.74
Old 09-20-2013, 10:13 PM
67c&ccorv's Avatar
67c&ccorv 67c&ccorv is offline
Afourian MVP
 
Join Date: Dec 2008
Location: London, ON
Posts: 1,559
Thanks: 4
Thanked 9 Times in 9 Posts
Don't know what your budget is but I think the mechanic is right...looks to me like you will most likely need a new water jacketed exhaust (or convert to water lift) and exhaust manifold.

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
Exhaust manifold problem re-post w/pic's wmmulvey Exhaust System 26 07-20-2012 10:49 AM
Exhaust Manifold Threads Stripped ccriders Exhaust System 13 03-30-2012 11:22 AM
manifold water leak v/s exhaust waterjacket leak, or BOTH alkaid Exhaust System 1 08-23-2005 02:36 PM


All times are GMT -4. The time now is 12:47 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2024 Moyer Marine Inc.

All Rights Reserved