Jump to content

80 Dm E6 Rebuild


bumpytruck
 Share

Recommended Posts

I have a few questions. First I have a 1980 DM Dump truck. It has the original motor however I am uncertain as to what has been done to it.I believe it has approx. 800,000 miles on it. It has blow by pretty bad and the oil pressuer is starting to flucuate a bit. I want to make thru my season. (nov)I would than like to do a rebuild on the motor.I have done many gasoline motors in my years but have never tackled a diesel of any kind.I just put a new turbo on this motor in july.I can pull the motor if need be but would perfer doing a in frame.Any advice would be greatly appreciated. Can someone advise were to purchase a manual for rebuilding this motor.What special tools are required.(Mack Specific)

Link to comment
Share on other sites

If you are havig issues with oil pressure, now is the time to deal with it. Crankshaft bearings are a lot cheaper than a crankshaft and a set of bearings. If the oil pressure increases when you let off the throttle, the mains are probably about gone. Don't wait too long. Manuals from Mach are pricey, I have seen some on ebay.

Link to comment
Share on other sites

Lousing oil press when its warm is normal. 60-90 psi cold is good / 30psi idle is good. if you cant get the oil press up over 40 after its warm it may be worn out. On the other hand I have seen some trucks run around 25psi at hot idle and then as soon as you give it 100RPM it shoots up to 70psi.

What is your hot idle and cold start psi?

I think my truck needs bearings soon because it is only 60 psi cold and 40 going down the road. I can hit 45PSI if im @2100 but I still think its too low of oil press.

Link to comment
Share on other sites

If you ant a diesel mechanic then at least get a mechanic to help. When you make a mastake in this engine it can mean a new engine some times. I can think of a lot of things a manual can not learn you on a one time over haul.I would try to find a mack dealer mechanic to do it on the side if you have a place and air for him to work.I would exspect it would cost you maybe 750 or 1000.00 for a side job but may be worth it in down time and the cost of a mishap.

glenn akers

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...