Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-06-2004, 06:33 PM
hotskillet
Guest
 
Posts: n/a
What is the break-in procedure for MB diesels?

This is somewhat of a stupid question, but I've never had a new or rebuilt MB diesel engine.
I was just think about this while I was thinking about rebuilding my 617 some day. Is it any different then a gas model, especially with the lower revs.

Just wondering.
Reply With Quote
  #2  
Old 01-06-2004, 07:05 PM
Stevo's Avatar
Registered User
 
Join Date: Apr 2002
Location: NW WA
Posts: 6,286
hotskillet

I rebuilt my 616 last spring in a friends shop just so he could help me out along the way. His procedure was to lub the cylinders with nothing but ATF so the rings will seat properly. When you fire it up run it at different RPMs. Wind it out (not excessively) and let off , Do not hold the same RPMs for extended periods. Change the oil after a couple hundred miles. Anyway this is what I was told and what I did. After 4K the engine uses little oil and runs very well.
__________________

1985 Euro 300TD 5 spd 220K
1985 Euro 240D 5 spd 130K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
Reply With Quote
  #3  
Old 01-07-2004, 06:07 AM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,277
There is a whole different oil filter that is supposed to be used during the break-in period.
Before starting an engine it should be turned over by the starter long enough to charge it with oil. For this the Glowplugs should be left out . On old regular engines one would use a ' false distributor bottom to connect to the oil pump and drive it with a big drill to charge the oil passages right before installing the distributor.
Piston rings should be coated with ' Assembly Grease" ... typically moly Di sulfide . It is called Assembly grease for a reason.. it will stay on the bearing surface long enough for oil to replace it.
Reply With Quote
  #4  
Old 01-07-2004, 11:47 AM
Stevo's Avatar
Registered User
 
Join Date: Apr 2002
Location: NW WA
Posts: 6,286
Morning Greg

I used that black moly Di sulfide Assembly Grease, it is spoz to stay there and protect things longer than anything else. Aley swore "only put ATF in the cylinders walls, "NO grease on the rings" according to him.

You should be able to access the top of the oil pump drive shaft with a drill motor but I think with things "lathered" up with assembly lub , moving parts are protected untill the oil pressure comes up before she lights off. Anyway that was Aleys procedure.
__________________

1985 Euro 300TD 5 spd 220K
1985 Euro 240D 5 spd 130K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
Reply With Quote
  #5  
Old 01-07-2004, 12:29 PM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,277
The manual says to use the oil...
But every other internal combustion engine instructions I have seen in 40 years says to use the Assembly Lube..
And it may very well be ok if you are on an assembly line or everything goes just fine in your assembling of the block...
But my assembly goes slower than that by a long shot... for instance... lets say we put the oil on a piston, install it and then go to the next ones... I turn the crank so that the connecting rod cap is on the down stroke... for ease of access... so the first piston installed will likely have several up and down strokes of the crank before the head even starts to get installed...
So the oil control rings are wiping the bore and the oil under normal temperatures is slowly following the beck and call of Gravity... Then there is no telling how long it will take me to get the top of the engine installed... and whatever else I decided to do in the engine compartment before the engine is ready to turn over for the first time... a couple of weeks would not be uncommon for me... and I just don't think there will be much regular oil on the upper rings/bore for those first few ' under power ' strokes...
Reply With Quote
  #6  
Old 01-07-2004, 12:45 PM
Stevo's Avatar
Registered User
 
Join Date: Apr 2002
Location: NW WA
Posts: 6,286
"Then there is no telling how long it will take me to get the top of the engine installed..." Good point. When I did my engine in Aleys shop I did get it all put together in short order as he needed the space., I will find out what he thinks about the "normal" case where its a while before its lit off. I am doing another 616 and I installed the pistons 3 weeks ago and the head is not on yet, maybe today Its been to cold here to work in the shop.
__________________

1985 Euro 300TD 5 spd 220K
1985 Euro 240D 5 spd 130K
1979 240D 5 spd, 40K on engine rebuild
1994 Dodge/Cummins, 5 spd, 121K
1964 Allice Chalmers D15 tractor
2014 Kubota L3800 tractor
1964 VW bug

"Lifes too short to drive a boring car"
Reply With Quote
  #7  
Old 01-07-2004, 12:54 PM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,277
I also said ' normal temps' ... LOL.... your oil is frozen to the ring lands... so it will be there when you need it....
Reply With Quote
  #8  
Old 01-07-2004, 02:30 PM
Rick Miley's Avatar
Spark Free
 
Join Date: Jun 1999
Location: Land O Lakes, FL
Posts: 3,086
That's the funniest dam thing I've read today. Greg, you crack me up!
__________________
Rick Miley
2014 Tesla Model S
2018 Tesla Model 3
2017 Nissan LEAF
Former MB: 99 E300, 86 190E 2.3, 87 300E, 80 240D, 82 204D Euro
Chain Elongation References
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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




All times are GMT -4. The time now is 05:13 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page