Injector Removal- Yanmar Engines - SailNet Community
 3Likes
Reply
 
LinkBack Thread Tools
post #1 of 13 Old 02-21-2013 Thread Starter
Senior Member
 
casey1999's Avatar
 
Join Date: Oct 2010
Location: HI
Posts: 3,281
Thanks: 18
Thanked 45 Times in 44 Posts
Rep Power: 5
 
Injector Removal- Yanmar Engines

I have a Yanmar 3gmd and have question on fuel injector removal. Looks like all Yanmars have similar injector arrangement.

How do you remove and reinstall an injector?

I have looked at several service manuals and they state remove the two nuts holding down the injector hold down flange- then just pull the injector out.

But there looks to be (from parts drawing) a lot of gasket, and o-ring, and insulators that are between injector and the head. Do you just leave these in if you plan to either replace or service the injector. Or do all or some of these parts need to be replaced when you reinstall the injector?

Regards
casey1999 is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 13 Old 02-21-2013
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,534
Thanks: 104
Thanked 312 Times in 300 Posts
Rep Power: 10
     
Re: Injector Removal- Yanmar Engines

Not real up on Yanmars, Casey, but in my experience any and all seals/washers/ etc involved in injector installs are one time use only except perhaps in an emergency.

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)
Faster is offline  
Quote Quick Reply Share with Facebook
post #3 of 13 Old 02-21-2013 Thread Starter
Senior Member
 
casey1999's Avatar
 
Join Date: Oct 2010
Location: HI
Posts: 3,281
Thanks: 18
Thanked 45 Times in 44 Posts
Rep Power: 5
 
Re: Injector Removal- Yanmar Engines

Quote:
Originally Posted by Faster View Post
Not real up on Yanmars, Casey, but in my experience any and all seals/washers/ etc involved in injector installs are one time use only except perhaps in an emergency.
Yes that is what I normally do. All these parts (o rings, insulators, washers) are deep in the head after pulling the injector. They look to be difficult to remove and to be sure you have all the items out. They can (or parts of them) fall into the injector hole then foul the cylinder (once in the cylinder, nearly impossible to remove). Normally the manuals I have specify to replace a gasket or o-ring, but with the injector removal, the manuals mention nothing.
casey1999 is offline  
Quote Quick Reply Share with Facebook
post #4 of 13 Old 02-21-2013
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,534
Thanks: 104
Thanked 312 Times in 300 Posts
Rep Power: 10
     
Re: Injector Removal- Yanmar Engines

A crochet-hook type tool can be helpful to try to remove those kinds of things and NOT drop them down.. but will they actually fit down and clear into the cylinder? Our Bosch seal rings wouldn't...

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)
Faster is offline  
Quote Quick Reply Share with Facebook
post #5 of 13 Old 02-22-2013 Thread Starter
Senior Member
 
casey1999's Avatar
 
Join Date: Oct 2010
Location: HI
Posts: 3,281
Thanks: 18
Thanked 45 Times in 44 Posts
Rep Power: 5
 
Re: Injector Removal- Yanmar Engines

Quote:
Originally Posted by Faster View Post
A crochet-hook type tool can be helpful to try to remove those kinds of things and NOT drop them down.. but will they actually fit down and clear into the cylinder? Our Bosch seal rings wouldn't...
Hook is a good idea. One of the parts is called an "insulator". Imagine it keeps the heet of combustion away from the fuel injector. Normally engine type "insulators" are made out of an asbestos or similar material. This material is normally somewhat brittle and breaks up into parts when you attempt to dis-assemble.
casey1999 is offline  
Quote Quick Reply Share with Facebook
post #6 of 13 Old 02-22-2013
Senior Member
 
overbored's Avatar
 
Join Date: Oct 2010
Location: Dana Point, Ca
Posts: 1,195
Thanks: 1
Thanked 63 Times in 63 Posts
Rep Power: 5
 
Re: Injector Removal- Yanmar Engines

the parts below the injector are the insulator which is a fiber disc and needs to be replaced the pre combustion chamber does not. I found that I could buy a new injector for less then having the shop rebuild them. $100 each and $125 to rebuild, but then I only have one.
Attached Thumbnails
Yanmar 1GM10 factory manual 7232154-Download_Service_Manual_Yanmar_1gm10_2gm20_3gm30_3hm35.pdf (.jpg  
bljones likes this.

"FULL TILT II" 2011 BENETEAU FIRST 30
"FULL TILT" SOVEREL 33
"GOLD RUSH" PRINDLE 16

Last edited by overbored; 02-22-2013 at 02:14 PM.
overbored is offline  
Quote Quick Reply Share with Facebook
post #7 of 13 Old 02-22-2013 Thread Starter
Senior Member
 
casey1999's Avatar
 
Join Date: Oct 2010
Location: HI
Posts: 3,281
Thanks: 18
Thanked 45 Times in 44 Posts
Rep Power: 5
 
Re: Injector Removal- Yanmar Engines

Quote:
Originally Posted by overbored View Post
the parts below the injector are the insulator which is a fiber disc and needs to be replaced the pre combustion chamber does not. I found that I could buy a new injector for less then having the shop rebuild them. $100 each and $125 to rebuild, but then I only have one.
So after you pull the injector out can the insulator be removed easily? Did you also replace the O-ring?
casey1999 is offline  
Quote Quick Reply Share with Facebook
post #8 of 13 Old 02-22-2013
Senior Member
 
overbored's Avatar
 
Join Date: Oct 2010
Location: Dana Point, Ca
Posts: 1,195
Thanks: 1
Thanked 63 Times in 63 Posts
Rep Power: 5
 
Re: Injector Removal- Yanmar Engines

the insulation washer fits down in to a recess on the top of the pre-combustion chamber and can be dug out with an awl or the like. it is a aluminizsed fiber washer, like head gasket material. the o ring is up around the top of the body of the injector and helps keep moisture from getting down the side of the injector so it does not rust and make removal at a latter date difficult. On mine the pre combustion chamber was changed and required the head be removed and a 10 ton press to get it out. the PO's so called mechanic did not put in an o ring and the parts were rusted in. he told me it was not needed so he left it out. he also told me that the injector was still good and when i remove it the nozzle hole was about twice the size of the new one. he doesn't work on this engine anymore.
bljones and casey1999 like this.

"FULL TILT II" 2011 BENETEAU FIRST 30
"FULL TILT" SOVEREL 33
"GOLD RUSH" PRINDLE 16

Last edited by overbored; 02-22-2013 at 02:42 PM.
overbored is offline  
Quote Quick Reply Share with Facebook
post #9 of 13 Old 02-22-2013 Thread Starter
Senior Member
 
casey1999's Avatar
 
Join Date: Oct 2010
Location: HI
Posts: 3,281
Thanks: 18
Thanked 45 Times in 44 Posts
Rep Power: 5
 
Re: Injector Removal- Yanmar Engines

Thanks for the advice. How did the engine run with the large injector nozzel hole?
casey1999 is offline  
Quote Quick Reply Share with Facebook
post #10 of 13 Old 02-22-2013
Senior Member
 
overbored's Avatar
 
Join Date: Oct 2010
Location: Dana Point, Ca
Posts: 1,195
Thanks: 1
Thanked 63 Times in 63 Posts
Rep Power: 5
 
Re: Injector Removal- Yanmar Engines

Quote:
Originally Posted by casey1999 View Post
Thanks for the advice. How did the engine run with the large injector nozzel hole?
it ran but very rich and a lot of black smoke with any rpm above idle. the engine was rebuilt about 5 years before I bought it. but they put on all the old stuff. the PO was tired of fixing the engine problems. which helped lead to him sell the boat. the compression checked out good. I replaced the entire fuel system. injectors, fuel pump, injection pump, lines, hoses, added a Racor and cleaned the tank out. set up the timing and adjusted the valves correctly. spent about $800 and $180 for new water pump, now it should be good for quite a while.

"FULL TILT II" 2011 BENETEAU FIRST 30
"FULL TILT" SOVEREL 33
"GOLD RUSH" PRINDLE 16
overbored 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
MD17C Injector Pump Removal erps Diesel 10 06-21-2012 08:38 PM
Yanmar YSE12 injector cleaning thedigitalforge Diesel 16 03-11-2011 12:48 PM
yanmar 2qm15 injector pump pfirth Diesel 19 01-21-2011 12:58 AM
Yanmar Injector Rebuilder SteveInMD Gear & Maintenance 5 12-14-2008 12:57 AM
new yanmar engines soapstone Gear & Maintenance 1 02-09-2004 03:57 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