Engine break-in????
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Freshman User
Joined: Oct 2004
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From: Nor-Cal
Engine break-in????
When I get my new truck is there any kind of an engine break-in period for it?? I can remember back in the day hearing, "Don't drive it over 55 for the first 1000 miles" or "Don't let the RPM's go past this certain point."
Last edited by Daryl Hunter; Dec 20, 2004 at 11:50 PM. Reason: Remove bold formatting
Cargo Master
Joined: Jun 2003
Posts: 2,203
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From: Carlsbad, California
The way that I do it is as follows:
Try to vary the engine speed for the first 300 - 500 miles, i.e., don't get the truck and jump on the Interstate and cruise at 70 MPH for a whole tank.
Some highway driving on a nice winding road where you are constantly varying the engine speed will do the trick. After the first 100 miles or so, do some nice roll ons where you ease on the throttle till you're full tilt for 5 to 10 seconds then let off and let the truck cool back down for a while.
Don't tow a heavy trailer till the mileage indicated in the diesel supplement that came with the truck, but do put some load on it. Build some boost and get those rings seated and other components operating with some load on them. This needs to be done in the first few hundred miles. If the truck is really babied for too long, the rings just won't seat right.
There are lots of posts on the topic, so do a search on break in on the 6.0 forum and sit back for an evenings reading
Try to vary the engine speed for the first 300 - 500 miles, i.e., don't get the truck and jump on the Interstate and cruise at 70 MPH for a whole tank.
Some highway driving on a nice winding road where you are constantly varying the engine speed will do the trick. After the first 100 miles or so, do some nice roll ons where you ease on the throttle till you're full tilt for 5 to 10 seconds then let off and let the truck cool back down for a while.
Don't tow a heavy trailer till the mileage indicated in the diesel supplement that came with the truck, but do put some load on it. Build some boost and get those rings seated and other components operating with some load on them. This needs to be done in the first few hundred miles. If the truck is really babied for too long, the rings just won't seat right.
There are lots of posts on the topic, so do a search on break in on the 6.0 forum and sit back for an evenings reading
Post Fiend
Joined: Apr 2004
Posts: 19,098
Likes: 8
From: Great State of Texas
pwrstrk...It is important that when you get your new truck...read the manual... with special regard to the diesel supplement that should be enclosed. A lot of your questions will be answered then.
In the meantime read up on all you can here. Pay close attention to oil change refill as a # of issue from '03 thru current model here have been attributed to to much oil because the manual said to put to much in.
Not contridicting my first paragraph BTW. For a sooth ride so to speak read...read...and read some more. The manual is not the 6.0 bible but will have a lot of good info...just need to confirm what it tells you here.
Everything Daryl said is abolutely true.
BTW Daryl when will that check be sent?
Oh yeah...In the mail huh?
In the meantime read up on all you can here. Pay close attention to oil change refill as a # of issue from '03 thru current model here have been attributed to to much oil because the manual said to put to much in.
Not contridicting my first paragraph BTW. For a sooth ride so to speak read...read...and read some more. The manual is not the 6.0 bible but will have a lot of good info...just need to confirm what it tells you here.
Everything Daryl said is abolutely true.
BTW Daryl when will that check be sent?
Oh yeah...In the mail huh?
Post Fiend
Joined: Aug 2002
Posts: 5,324
Likes: 1
From: Denton,TX
Cross-Country
Joined: Nov 2004
Posts: 67
Likes: 7
From: Eastern WA
Originally Posted by johnsdiesel
Anyone have any ideas why the service manager would tell us not to worry about the break in period? The service manager was very confident in the diesel's durability.
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Post Fiend
Joined: Aug 2002
Posts: 5,324
Likes: 1
From: Denton,TX
Tall Paul, I do not believe your service manager. Read the first part of the article and that should answer your question about the service manager. BTW, I've known plenty of service managers that are clueless about diesels, and plenty of certified diesel techs that I won't even let near my truck. I believe that the article is still pertinant today, and it is still linked on the website for Diesel Injection Service, a huge diesel service chain down here in Texas.
Here's a little excerpt:
Here's a little excerpt:
According to the manufacturer, there is supposed to be “no break-in necessary”? Many of the engine manufacturers claim that their engines do not require break-in. That is just pure baloney! Enough pestering and a few references to some of the Cummins shop manuals have painted a clearer picture. All engines require some kind of break-in period. This is even true with current technology.
Last edited by johnsdiesel; Dec 22, 2004 at 09:44 PM.
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Post Fiend
Joined: Aug 2002
Posts: 5,324
Likes: 1
From: Denton,TX
I agree. Your truck certianly won't blow up if you don't follow the advice in that article, but you will certianly get a better break in if you follow that advice. Better break in could mean better mileage, and down the road less problems. Diesels also take a lot longer to break in than the typical gas engine anyway. I would ignore the service manager and take the advice of the diesel experts from DIS.
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