Volvo Md7a Injectors Question! - 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? 
  #1  
Old 07-08-2009
Senior Member
 
Join Date: May 2005
Posts: 139
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
Neicy is on a distinguished road
Volvo Md7a Injectors Question!

Recently pulled the injectors on this engine for cleaning and new tips. Was supposed to be simple (everyone said). Anyway the problem has been getting them to reseat. Was able to get one seated, however the other I have ended up having to replace.
Here is the problem. Still cannot get the thing (new one) to seat properly. It spews diesel when the engine is cranked. I changed their position and this one injector spews fuel in either spot. Today I ordered a new fuel line for it, but have no idea if it will take care of the problem.
Anyone have any ideas or had a similar problem. I have a mechanic helping. One mechanic I contacted, just said "I run from MD7A injectors"!
Not comforting at all. This also was my week of vacation. I am stuck at the dock. Possible solutions are welcome!
Reply With Quote Quick reply to this message Share with Facebook
  #2  
Old 07-09-2009
Junior Member
 
Join Date: Jul 2000
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
bilgediver is on a distinguished road
Seating?

Usually when using the word seating we associate this with the injector seating in the head. I suspect you mean the seating of the HP connection.

Try this......put the injector in its pocket and put the clamp on but leave the clamp loose enough to allow the injector to mover sideways.

Now connect up the HP connection moving the injector so it lines up and do not put any washers or anything else in the connection and do it up tight once both injectors are coupled to the HP pipes connect up the smaller spill pipe using new white metal washers if possible. If using old copper washers then heat them to red heat on the grill and drop into a glass of water... This softens them. You may have to adjust the bends in this pipe for it to fit easily.

Now tighten down the injector clamps.

You will have to slacken off the spill and HP connections for priming the engine.
Reply With Quote Quick reply to this message Share with Facebook
  #3  
Old 07-09-2009
Senior Member
 
Join Date: May 2005
Posts: 139
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 10
Neicy is on a distinguished road
Bilgediver

Thanks for the info. Have tried all the suggestions except the heating of the copper washers. On the old injector I replaced and used new white washers however, the new injector I have purchased did come with copper,so I will try the heat thing.
Also it is the in flow fitting at the connection that is leaking.
Have not had to prime the engine so far. Just cut the fuel supply while working and when ready to try turn it on. It turns and cranks almost immediately. My turnoff is beside the engine.
Like I said I have ordered a new fuel line for the injector thinking that the in flow connector is somehow bad or that the old fuel line is not fitting the new injector.
Reply With Quote Quick reply to this message Share with Facebook
  #4  
Old 10-05-2009
waterrat2's Avatar
Junior Member
 
Join Date: Aug 2008
Posts: 6
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
waterrat2 is on a distinguished road
Neicy,
I read on another thread that you did solve this problem. I too have a MD 7A. No injector problems yet (knock on wood) but for future reference, wonder what the solution to the seating problem was. Was the old fuel line incompatible with the new injector?
Reply With Quote Quick reply to this message 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:

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Volvo Penta MD2020 Question spec2 Diesel 4 09-03-2009 09:32 AM
Ladder question mcain Gear & Maintenance 14 08-03-2007 11:28 PM
What to do next ? took Volvo apart... john232 Gear & Maintenance 8 12-06-2003 11:55 AM
Volvo Prop Question mikehoyt Gear & Maintenance 0 04-01-2003 07:46 AM
Volvo intake valves for MD6A not avaiable from Volvo Larrys Pal Gear & Maintenance 5 03-27-2002 06:58 AM


All times are GMT -4. The time now is 05:30 PM.

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.