Yanmar 2GM20 steam through the 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 > On Board > Gear & Maintenance > Engines > Diesel
 Not a Member? 

Diesel This is a forum dedicated to diesel engines and their applicable accessories.


Reply
 
LinkBack Thread Tools
  #1  
Old 06-06-2012
Junior Member
 
Join Date: Jun 2012
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
trendyp is on a distinguished road
Yanmar 2GM20 steam through the Exhaust

Help.
I have a Yanmar 2GM20 that when not in gear and high revs the exhaust is normal. As soon as the gear engages steam comes out of the exhaust.
I have checked the water pump and engine for blockages, there are none.
Has anybody got any ideas...??
Reply With Quote Share with Facebook
  #2  
Old 06-06-2012
Oaksail's Avatar
Member
 
Join Date: Jan 2011
Location: Oakville, Ontario
Posts: 49
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 0
Oaksail is on a distinguished road
Yanmar 2GM20 steam through the Exhaust

Steam in the exhaust indicates water or coolant from the cooling passages is getting into the combustion chambers
__________________
1989 CS30
Reply With Quote Share with Facebook
  #3  
Old 06-06-2012
PorFin's Avatar
Señor Member
 
Join Date: Sep 2007
Posts: 1,340
Thanks: 1
Thanked 8 Times in 8 Posts
Rep Power: 8
PorFin is on a distinguished road
Re: Yanmar 2GM20 steam through the Exhaust

Quote:
Originally Posted by Oaksail View Post
Steam in the exhaust indicates water or coolant from the cooling passages is getting into the combustion chambers
If you're lucky, it's just a leaking head gasket. Try torquing your head bolts back down to see if that solves the issue. Hopefully, it will.

If not, then you need to rule out the other possibilities (e.g., warped head, cracked head, cracked block, etc.)
Reply With Quote Share with Facebook
  #4  
Old 06-06-2012
Faster's Avatar
Just another Moderator
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 14,702
Thanks: 69
Thanked 197 Times in 189 Posts
Rep Power: 10
Faster has a spectacular aura about Faster has a spectacular aura about Faster has a spectacular aura about
Re: Yanmar 2GM20 steam through the Exhaust

Is it steam or white smoke?.. There is a difference. Steam indicates overly warm raw water, actual white smoke is usually coolant being burned. Is your mixing elbow in good shape?
__________________
Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Reply With Quote Share with Facebook
  #5  
Old 06-07-2012
boatpoker's Avatar
Senior Member
 
Join Date: Jul 2008
Location: Toronto
Posts: 1,053
Thanks: 8
Thanked 25 Times in 24 Posts
Rep Power: 7
boatpoker is on a distinguished road
Re: Yanmar 2GM20 steam through the Exhaust

Look at your oil and coolant for contamination, water in the oil or oil in your coolant and you've got a problem.
__________________
Dirt People Scare me
Reply With Quote Share with Facebook
  #6  
Old 06-08-2012
Junior Member
 
Join Date: Jun 2012
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
trendyp is on a distinguished road
Re: Yanmar 2GM20 steam through the Exhaust

Thanks for the advice. I tried torqueing the cylinder head bolts and they were tight so I took off the head to have it tested. The head and gasket looked ok to me, although I don't really know what I'm lookig for. I also took out the injectors and injector pump to have them tested. Hope i've covered averything.
Reply With Quote Share with Facebook
  #7  
Old 06-09-2012
centaursailor's Avatar
Senior in age only!!!
 
Join Date: Nov 2010
Location: Balbriggan
Posts: 554
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 4
centaursailor is on a distinguished road
Re: Yanmar 2GM20 steam through the Exhaust

Recently had the same problem after fitting a new replacement impeller in the cooling water pump. Spitting water but lots of steam. Put back the old one and everything back to normal. Maybe yours is worn.
Safe sailing
__________________
The great appear great because you are on your knees. James Larkin, Irish Labour Movement.
Reply With Quote Share with Facebook
  #8  
Old 06-09-2012
SlowButSteady's Avatar
Senior Slacker
 
Join Date: Feb 2010
Location: SoCal
Posts: 4,223
Thanks: 0
Thanked 17 Times in 15 Posts
Rep Power: 5
SlowButSteady is on a distinguished road
Re: Yanmar 2GM20 steam through the Exhaust

Could be an almost clogged water injector in the mixing elbow -- there isn't enough water flowing through the system to keep the elbow cool, hence the steam. Take the mixing elbow off and see how much crap has built up inside. Also, try blowing into the nipple where the water hose connects to the elbow; if you get any back pressure then it's probably time for a new elbow.
__________________
Never forget them. Do something to prevent it from happening again.
Charlotte Bacon, Daniel Barden, Rachel Davino, Olivia Josephine Gay, Ana M. Marquez-Greene, Dylan Hockley, Dawn Hochsprung, Madeleine F. Hsu, Catherine V. Hubbard, Chase Kowalski, Jesse Lewis, James Mattioli , Grace McDonnell, Anne Marie Murphy, Emilie Parker, Jack Pinto, Noah Pozner, Caroline Previdi, Jessica Rekos, Avielle Richman, Lauren Rousseau, Mary Sherlach, Victoria Soto, Benjamin Wheeler, Allison N. Wyatt
Reply With Quote Share with Facebook
Reply


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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Yanmar 2GM20 vs 2GM20(f) (What the F?) L124C Diesel 11 06-17-2011 04:08 PM
Help regarding steam or smoke coming from an exhaust component, time sensitive.. chrisncate General Discussion (sailing related) 34 02-17-2011 10:41 PM
Yanmar YSM 12 Vs. 2GM20 Medusa28 Diesel 2 11-08-2010 12:20 PM
Yanmar 2GM20 F Exhaust Riser bolt Torque specs ronsunni Diesel 0 10-08-2009 01:59 PM
Exhaust Steam Sixbrothers Diesel 3 09-06-2009 05:19 PM


All times are GMT -4. The time now is 11:10 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.