M4wd&Fabrications

Projects place => Projects Section => Topic started by: matt on May 28, 2013, 12:47:56 PM

Title: Found the problem with my cummins
Post by: matt on May 28, 2013, 12:47:56 PM

(http://i126.photobucket.com/albums/p97/mattmey/IMG_20130525_181111_zps0ca38658.jpg)

Now to check the head and the block for flatness.  Hopefully tonights project if it is not raining.

Title: Re: Found the problem with my cummins
Post by: Harrison on May 28, 2013, 12:52:13 PM

How many miles?

You said it was running on 4 cylinders according to the injector line diagnosis method?

Did it get progressively worse or did it just run like shit one day?

Title: Re: Found the problem with my cummins
Post by: matt on May 28, 2013, 02:14:40 PM

Yeah 4 on the injector line diagnosis. 

Just running along and then like ....  and that's all she wrote.

Title: Re: Found the problem with my cummins
Post by: matt on May 30, 2013, 08:45:39 AM

Doesn't look good

(http://i126.photobucket.com/albums/p97/mattmey/NUMBER5CYLINDER_zps4a0b05f3.jpg) (http://s126.photobucket.com/user/mattmey/media/NUMBER5CYLINDER_zps4a0b05f3.jpg.html)

Title: Re: Found the problem with my cummins
Post by: matt on May 30, 2013, 08:46:16 AM

And piston # 6

(http://i126.photobucket.com/albums/p97/mattmey/PISTON6_zps3aa13f4d.jpg) (http://s126.photobucket.com/user/mattmey/media/PISTON6_zps3aa13f4d.jpg.html)

Title: Found the problem with my cummins
Post by: etk300ex on May 30, 2013, 08:53:39 AM

No good

Title: Re: Found the problem with my cummins
Post by: Ryan on May 30, 2013, 09:01:23 AM

Ouch, run it  ;D

Title: Re: Found the problem with my cummins
Post by: rejeep on May 30, 2013, 09:12:27 AM

gasket and sell

Title: Re: Found the problem with my cummins
Post by: Wingman on May 30, 2013, 09:13:41 AM

Has another billionty miles in it!

Title: Re: Found the problem with my cummins
Post by: matt on May 30, 2013, 09:35:39 AM

Bad time of year to have this happen.  Looks like no camping or wheeling trips for a while.

The scratches aren't that bad...  going to see if the rings are still sealed and it the bores are round.  If they are, I may re ring it till to get me by till winter or just run it till I can pull it to rebuild.

Title: Re: Found the problem with my cummins
Post by: Harrison on May 30, 2013, 10:00:32 AM

Water in the cylinders? High EGTs? How many miles?

Title: Found the problem with my cummins
Post by: mr.mindless on May 30, 2013, 10:52:05 AM

Ouch.

I wonder if the bad HG gave it a hot spot. Looks like that bad part lines up with where the gasket was holed?

If the early and late 12v pistons match I have good stock pistons from my first motor. I think the bowls are the same but it would deserve a minute of research.

Mild hone in that hole and fresh rings on a good piston could probably get her happy again for a decent amount of time with minimal downtime and expense.


Tapatalking in traffic

Title: Re: Found the problem with my cummins
Post by: matt on June 06, 2013, 08:43:52 AM

Any of you guys have a service manual for a cummins?  Looked on line and found nothing. 

Specifically wear limits and max out of round for cylinders.  Got a bore indictor and cylinders are .002" out of round.  Want to double check size of bores before I just hone and rering that one cylinder.

Title: Re: Found the problem with my cummins
Post by: matt on August 07, 2013, 11:25:23 AM

So many dollars later.

(http://i126.photobucket.com/albums/p97/mattmey/IMG_20130802_193947_zps61cab4f3.jpg) (http://s126.photobucket.com/user/mattmey/media/IMG_20130802_193947_zps61cab4f3.jpg.html)

(http://i126.photobucket.com/albums/p97/mattmey/IMG_20130802_193955_zps43c67b52.jpg) (http://s126.photobucket.com/user/mattmey/media/IMG_20130802_193955_zps43c67b52.jpg.html)

Title: Re: Found the problem with my cummins
Post by: matt on August 07, 2013, 11:30:24 AM

And finally in and running.

(http://i126.photobucket.com/albums/p97/mattmey/IMG_20130806_132900_zps1cda6cb5.jpg) (http://s126.photobucket.com/user/mattmey/media/IMG_20130806_132900_zps1cda6cb5.jpg.html)

(http://i126.photobucket.com/albums/p97/mattmey/IMG_20130806_132926_zps4aea1916.jpg) (http://s126.photobucket.com/user/mattmey/media/IMG_20130806_132926_zps4aea1916.jpg.html)

My daughter picked the paint.  I was worried it was going to be pink or purple. lol

Runs great.  Smoother running, more power, and quieter.  New injectors are great.  Marine 370's....

Title: Re: Found the problem with my cummins
Post by: mr.mindless on August 07, 2013, 01:05:32 PM

Make for a nice upgrade. At least it should be GOOD for many many miles to come now.


Tapatalking in traffic