Breaking in rebuilt 7.3 - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 26 (permalink) Old 07-11-2008, 05:17 PM Thread Starter
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Breaking in rebuilt 7.3

Whats the general consensus on breaking in a rebuilt 7.3? Some say put in stock injectors and tune and some say to run what your have for injectors and tuning and go. What's the best way to do it?

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post #2 of 26 (permalink) Old 07-11-2008, 05:39 PM
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Re: Breaking in rebuilt 7.3

Danny has a video of his break in procedure on the pumpkin.





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post #3 of 26 (permalink) Old 07-11-2008, 05:49 PM
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Re: Breaking in rebuilt 7.3

I'm going to run what i have i see no reason not to. I'm going to run dino oil for the first oil change to allow the rings to seat. After that i'm going synthetic.

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post #4 of 26 (permalink) Old 07-11-2008, 06:18 PM Thread Starter
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Re: Breaking in rebuilt 7.3

Yea, I saw Danny's vid, David suggested the same procedure.

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post #5 of 26 (permalink) Old 07-11-2008, 06:33 PM
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Re: Breaking in rebuilt 7.3

What vid ?

I know that your first oil change should be at 500 then go to regular procedures........

Is it like a gas motor where you have to run it to get the coating off the cam on first start up ?

Then its just different rpms, loads and speeds right ?

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post #6 of 26 (permalink) Old 07-11-2008, 06:35 PM
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Re: Breaking in rebuilt 7.3

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Originally Posted by Dieselboy View Post
What vid?
I would assume it has something to do with a nice burn out

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post #7 of 26 (permalink) Old 07-11-2008, 06:42 PM
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Re: Breaking in rebuilt 7.3

FWIW I would run dino oil for more than 500 miles before going to synthetic. If you change the breakin oil at 500 or 1000 miles put dino back in for another 3000 to 5000 miles. There's no reason to have the possibility of not getting the rings seated right away just because you want to run synthetic oil.

And personally I think all that varying speed and don't go over 55 mph stuff is just a load of crap. Use the truck like you would use it normally. I wouldn't run a high hp chip program but anything that makes less than 300 hp should be fine. I would prefer to get it hooked to a fairly heavy trailer for at least 50 to 100 miles during the first 3 to 5000 miles with dino oil but that probably isn't necessary.



Once the camshaft is broke in on our gas race engines (about 25 minutes at 2500 to 3000 RPM idle) it's game on! I really don't see why a PSD would be that much different.

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post #8 of 26 (permalink) Old 07-11-2008, 06:48 PM
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Re: Breaking in rebuilt 7.3

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Originally Posted by racehauler View Post
FWIW I would run dino oil for more than 500 miles before going to synthetic. If you change the breakin oil at 500 or 1000 miles put dino back in for another 3000 to 5000 miles. There's no reason to have the possibility of not getting the rings seated right away just because you want to run synthetic oil.
My understanding was that the rings were essentially seated in the first few 100 miles and that you should get it all hot and loaded with lots of acceleration/deceleration with engine compression to have them seat well. Hence the advice to drive it like you stole it once the you are sure everything is spinning over correctly and without leaks etc. I have read that all of the engines coming from Navistar are run for some time at close to Max RPMs before released to Ford. Not just up and down the RPM range but enough to have the turbo glowing nicely.

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post #9 of 26 (permalink) Old 07-11-2008, 06:54 PM
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Re: Breaking in rebuilt 7.3

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Originally Posted by BMacD View Post
I would assume it has something to do with a nice burn out
Yup! Got a latenight phonecall on that one. Good thing David was on the pink drinks. If not he would have probably had a stroke.





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post #10 of 26 (permalink) Old 07-11-2008, 06:55 PM
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Re: Breaking in rebuilt 7.3

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Originally Posted by Haul_n_horses2 View Post
My understanding was that the rings were essentially seated in the first few 100 miles and that you should get it all hot and loaded with lots of acceleration/deceleration with engine compression to have them seat well. Hence the advice to drive it like you stole it once the you are sure everything is spinning over correctly and without leaks etc. I have read that all of the engines coming from Navistar are run for some time at close to Max RPMs before released to Ford. Not just up and down the RPM range but enough to have the turbo glowing nicely.
Running at max RPM's for break in is a good thing becuase the piston goes up and down a whole lot more times than it does if you tool around a 2K. Exactly double the times at 4K RPM so it will take 1/2 the time to get the rings seated.

I would just run dino oil for that long becuase it sure as hell anit going to hurt anything. Switching to syntetic too early on the other hand........

Eric
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