Remove Exhaust Manifold, or Rydlyme flush? - SailNet Community
 
LinkBack Thread Tools
post #1 of 2 Old 07-18-2013 Thread Starter
Senior Member
 
Join Date: Sep 2012
Location: Bremerton, Washington
Posts: 206
Thanks: 4
Thanked 0 Times in 0 Posts
Rep Power: 3
 
Remove Exhaust Manifold, or Rydlyme flush?

As mentioned in a separate thread, I'm having some mild overheating problems with my 1981 Yanmar 2QM15 (raw water cooled). Web research suggests that the water passages are likely occluded.

Some people recommend physical removal of the exhaust manifold and elbow for cleaning/tanking. Other people recommend flushing with Rydlyme or equivalent.

I'm a little hesitant to remove the manifold if I don't have to. 30 plus year old fasteners and parts have a way of giving out, and some of these items (like the manifold itself) are no longer available. On the other hand, if the exhaust manifold passages are as clogged as some people suggest, the Rydlyme might not be adequate.

Anybody been through this before? Recommendations?

1981 Spirit 28 "Bonnie Lass"
Bremerton, Washington
Rusty123 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 2 Old 07-18-2013
Senior Member
 
JimsCAL's Avatar
 
Join Date: May 2007
Location: Glen Cove, NY
Posts: 2,809
Thanks: 2
Thanked 71 Times in 66 Posts
Rep Power: 9
 
Re: Remove Exhaust Manifold, or Rydlyme flush?

I'd try the acid flush first. A common maintenance measure on Atomic 4s, most of which are raw water cooled. If the passages are not completely blocked, it may help enough to eliminate the overheating problem. I did it several times on my previous boat which had a raw water cooled Universal 5411. I used oxalic acid from the hardware store.
JimsCAL is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

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
Need used exhaust manifold Began77 Diesel 1 09-26-2012 07:48 AM
need exhaust manifold for my W30 captaineasy Gear & Maintenance 0 10-06-2009 05:08 PM
Need W 30 exhaust manifold captaineasy Diesel 0 10-06-2009 03:47 PM
Volvo MD-11C Exhaust manifold flydude3 Gear & Maintenance 1 04-14-2005 01:06 AM
MD11C Exhaust Manifold takwita Gear & Maintenance 1 11-10-2004 01:35 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