Yanmar 3GM oil line failure - 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.


Like Tree2Likes
Reply
 
LinkBack Thread Tools
  #1  
Old 11-25-2011
jrd22's Avatar
Courtney the Dancer
 
Join Date: Nov 2000
Location: San Juan Islands., WA, USA
Posts: 3,816
Thanks: 3
Thanked 14 Times in 14 Posts
Rep Power: 14
jrd22 will become famous soon enough
Yanmar 3GM oil line failure

My brother and I installed a new 3GM in the early 90's and apart from normal maintenance it's been trouble free and still looks almost new. A few weeks ago it was run while in the slip for about 20 minutes. I checked the oil prior to starting it a week later and there wasn't any oil on the stick. There was a lot of oil in the bilge and after filling the engine up to the full mark on the stick I started it up to find the leak. I had noticed some oil near the back of the engine on the starboard side prior to starting it and sure enough there was a large stream of oil running down the block there. It was coming from a very small oil line that goes from the starboard side of the block by the injection pump around the back of the engine and then down around the port side under the starter. There are a total of four banjo fittings in this little line and it must have developed a crack for some reason and let go. This is a steel line by the way and there was a little corrosion near the leak so it probably wouldn't have been long before it rusted through and started leaking there (not an easy place to see). The new line looks to be copper so corrosion shouldn't be a problem. Installation wasn't too bad but did require two people to get the copper washers behind the banjo fittings. I didn't even realize there was an external pressure line on the engine. Anyway, just a heads up if you have an older 3GM, it could have destroyed the engine if it had been running at high RPM. The low oil pressure alarm never went off and appears to be working properly, although I would have thought it would go off if the engine was three quarts low (which it was).
Faster and smurphny like this.
__________________
John
SV Laurie Anne

1988 Brewer 40 Pilothouse

Reply With Quote Share with Facebook
  #2  
Old 11-28-2011
casey1999's Avatar
Senior Member
 
Join Date: Oct 2010
Location: HI
Posts: 2,830
Thanks: 4
Thanked 17 Times in 17 Posts
Rep Power: 4
casey1999 is on a distinguished road
Thanks for the heads up. Also have a 3gmd that has quite a bit of corrsion. Plan to clean and paint the engine in next few months, may end up replacing some of the oil lines as you suggest.
Regards
Reply With Quote Share with Facebook
  #3  
Old 11-28-2011
Member
 
Join Date: Jun 2011
Location: Southern Chesapeake Bay
Posts: 80
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 4
ggray is on a distinguished road
BTDT
Mine pumped out all the oil until the alarm went off. Shut it off immediately. Real mess, but no damage to engine.
You might be right, but I suspect it is just a copper coating of some sort.
Reply With Quote Share with Facebook
  #4  
Old 01-02-2012
Junior Member
 
Join Date: Jan 2012
Posts: 3
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
jurgenvoigt is on a distinguished road
Red face

My 2001 3GM30 has also developed an Oil Line Pin Hole,... took me weeks to find where the oil was going... Until I source a replacement, do you think I could use epoxy putty or tape until it arrives,...

I'm currently out in the Pacific on the yacht and not close to port for weeks..

Did you find an after-market replacement ??? like those flexible Braided type,.. Where & What Price ??

What price are the Yanmar replacements .. Where from..??

Ordering online would be good for me...

I have a number of other parts to order..

Thanks for your help
Best Regards

Jurgen
In the Pacific..
Reply With Quote Share with Facebook
  #5  
Old 01-02-2012
smurphny's Avatar
Over Hill Sailing Club
 
Join Date: Feb 2009
Location: Adirondacks NY
Posts: 2,800
Thanks: 55
Thanked 63 Times in 61 Posts
Rep Power: 6
smurphny is on a distinguished road
Thanks for the heads-up. I'll have to check mine.
__________________
Alberg 35: With a philosophical flourish Cato throws himself upon his sword; I quietly take to the ship.
Reply With Quote Share with Facebook
  #6  
Old 01-03-2012
Senior Member
 
Join Date: Sep 2006
Posts: 2,195
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 8
Rockter will become famous soon enough
Yea, there is a similar line on the Volvo MD17C that runs from the oil filter region, over the top of the motor to the injection pump region.
Twice it has blown the banjo off and pumped the motor dry.
What on earth is it for?
Is there much flow through it?
Can I use a braided line instead?
Reply With Quote Share with Facebook
  #7  
Old 01-03-2012
casey1999's Avatar
Senior Member
 
Join Date: Oct 2010
Location: HI
Posts: 2,830
Thanks: 4
Thanked 17 Times in 17 Posts
Rep Power: 4
casey1999 is on a distinguished road
Quote:
Originally Posted by jurgenvoigt View Post
My 2001 3GM30 has also developed an Oil Line Pin Hole,... took me weeks to find where the oil was going... Until I source a replacement, do you think I could use epoxy putty or tape until it arrives,...

I'm currently out in the Pacific on the yacht and not close to port for weeks..

Did you find an after-market replacement ??? like those flexible Braided type,.. Where & What Price ??

What price are the Yanmar replacements .. Where from..??

Ordering online would be good for me...

I have a number of other parts to order..

Thanks for your help
Best Regards

Jurgen
In the Pacific..
Try this Yanmar Rep:
Torresen Marine - The Sailboat Specialist
The should be able to help. They have and email on the contact information.
For short term maybe wrap the leak with some tape (duct) and then put a hose clamp over the tape and tighten. Might leak a small amount but may slow down the larger leak. Just epoxy on a small line may not hold. Maybe epoxy, tape then a hose clamp.
Regards
Reply With Quote Share with Facebook
  #8  
Old 01-03-2012
jrd22's Avatar
Courtney the Dancer
 
Join Date: Nov 2000
Location: San Juan Islands., WA, USA
Posts: 3,816
Thanks: 3
Thanked 14 Times in 14 Posts
Rep Power: 14
jrd22 will become famous soon enough
Quote:
Originally Posted by jurgenvoigt View Post
My 2001 3GM30 has also developed an Oil Line Pin Hole,... took me weeks to find where the oil was going... Until I source a replacement, do you think I could use epoxy putty or tape until it arrives,...

I'm currently out in the Pacific on the yacht and not close to port for weeks..

Did you find an after-market replacement ??? like those flexible Braided type,.. Where & What Price ??

What price are the Yanmar replacements .. Where from..??

Ordering online would be good for me...

I have a number of other parts to order..

Thanks for your help
Best Regards

Jurgen
In the Pacific..
Hi Jurgen, Rather than epoxy or tape I think I would use a thin piece of neoprene if you have it rolled around the tube with a hose clamp right over the pinhole leak. This would only work if the leak is on one of the straight sections of the tube (our leak was at a bend).
My brother didn't look for an aftermarket replacement, I think it would be unusual if one was available. It's a very unusual tube with four banjo fittings and everything has to line up perfectly in order to fit. I think it was less than $100 US (ridiculously high for what it is), but I don't have an exact cost. You will need eight (get ten or twelve, they are easy to lose in the bilge) copper crush washers as well.
Good luck.
__________________
John
SV Laurie Anne

1988 Brewer 40 Pilothouse

Reply With Quote Share with Facebook
  #9  
Old 01-04-2012
Member
 
Join Date: Jun 2011
Location: Southern Chesapeake Bay
Posts: 80
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 4
ggray is on a distinguished road
I may be dreaming, but I think I was pleasantly surprised at the price. Of course, it was not an item normally stocked even by a major source.
Reply With Quote Share with Facebook
  #10  
Old 01-13-2012
S34 S34 is offline
Junior Member
 
Join Date: Jul 2010
Location: NZ
Posts: 11
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
S34 is on a distinguished road
Unhappy

Torresons won't ship to anywhere other than their dealership area for Yanmar parts.
That is either Cu coating or yellow electro-zinc because its steel underneath on the OEM lines. I coated mine with flexible epoxy when I replaced it. $47.50 + $6 for Cu washers. You won't need the banjo bolts as you can use the old ones.

As a temporary repair i would put a tiny bit of tape over the pin hole, then clean the line and wind some epoxy impregnated fine (4oz) cloth around it. or just epoxy with finely chopped glass mixed in and blobbed onto the area, building it up with multiple batches to withstand the pressure.
Depends where the pinhole is.

Last edited by S34; 01-13-2012 at 09:54 PM.
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 YM oil pressure alarm failure ctlow Diesel 9 06-27-2013 05:07 PM
Yanmar 2GM20F lift pump fuel line size arf145 Diesel 3 05-05-2013 08:30 AM
Engine Failure After Line Caught in Prop ahalfon Diesel 8 09-24-2011 06:13 PM
Yanmar 3ym20 pre mature water pump failure jbrockpiano Diesel 7 09-19-2010 09:25 AM
Line Choice for Single-Line Reefing lmitchell Gear & Maintenance 6 04-12-2007 01:38 PM


All times are GMT -4. The time now is 02:07 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.