White Diesel Exhaust - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > Contributing Authors > Gear and Maintenance Articles
 Not a Member? 


Closed Thread
 
LinkBack Thread Tools
  #1  
Old 09-19-2000
Contributing Authors
 
Join Date: Jan 2000
Posts: 266
Thanks: 0
Thanked 10 Times in 7 Posts
Rep Power: 15
Tom Wood is on a distinguished road
White Diesel Exhaust

When my Perkins M-30 runs at high rpm, white vapor occasionally comes out of the exhaust. Any thoughts?

Tom Wood responds:

Diesels do smoke—and if you have to have a small amount of smoke, white to very pale gray that dissipates quickly is good. This small amount of smoke without much color indicates a healthy burn ratio of air and fuel and that there are no problems with fuel metering or oil burning.

Vast quantities of white smoke, especially under a high load when the engine is hot, can be another story. White smoke can actually be steam. This problem usually would not be indicative of water in the fuel, since that much water mixed in the diesel fuel would cause starting and running problems. However, a small water passage from the coolant side into the combustion chamber would allow the engine to start and run properly, especially when cold, but to issue steam as it warms up.

The cause of such excessive white smoke could be a "blown" head gasket, a small crack in the head, or a crack in a cylinder wall or liner. These problems never get better—only worse. A salt-water cooled engine makes this passage of water into the combustion chamber difficult to diagnose. A closed, fresh-water cooled system, however, will make the problem obvious if the header tank or reservoir constantly needs to have coolant added after the engine is run. If your issuance of white steam-like smoke continues to worsen, especially if the engine begins to start or run poorly, then you will probably face a teardown of the engine, or at least removal of the head, to diagnose the problem by visual inspection.

Quick reply to this message
Closed Thread

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:

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

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



All times are GMT -4. The time now is 08:17 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.