Rjm321

So I am getting a new long block put in my 2012 f150 5.0. I am wanting to know if there is a certain procedure that I need to follow to break in that motor correctly.

dlbb

6k all day







just kidding. i figured you may be stressed having to get a new motor.
biggest thing is varying the rpms and staying under 2500 or so for the first 300 miles.
under 3500 for the second 300 miles.
under 4500 for the third 300. then drive it however.
use manuel shift or lock out higher gears to vary the rpms.

antony1103

I don't believe there is any "official" break-in procedure for most vehicles anymore. Better manufacturing processes and squeaky clean QC have made that a thing of the past. Trying to remember what the manual for my 2013 5.0 said, the only thing it suggested was not to tow or haul anything for the first 500 miles or so. I wouldn't be going WOT at every stoplight or redlining it on the highway, but normal everyday driving for the first 1000 miles or so is probably your best bet.

Koolponycar

I just had a new SB installed in my 5.0 under warranty and i asked the shop the same question and they told me this same thing. Do not tow or haul anything heavy for the first 1,000 miles. I drove it normal and easy. I still have not gone WOT. I have pulled a small utility trailer with a rider and also 2 moto cross bikes several times, which the dealer said would be fine as the weight is not much at all. I did change the oil after the first 1,000 miles just because the used my heads and cams, had parts off the original SB to make sure any impurities may be drained and filtered out. I will still have them change the oil as scheduled. truck running great!

32krazy!

use joe gibbs dt-40 break in oil for 30 minutes drive normal drain the oil and refill. thats about it for a break in nowadays

Mike94ZLT1

Let it reach operating temp and drive it like you stole it. I beat the **** out of the motor in my Corvette right after I built it. Where I live there is a long stretch of highway with on and off ramps every mile. I would hammer it on every on ramp, and then engine brake my way up the exit ramp, and get right back on and repeat the process.

33K miles later it doesn't burn a drop of oil, compression is great and even across all cylinders, and is just as snappy as ever.

Ricktwuhk

Manual explains break in for the first 1,000 miles. Owner.ford.com if you need a copy. No towing, vary speed / rpm.

CHICKS

Bought mine brand new new, 20 miles. I towed my 5500 lbs boat that very weekend, still a beast @ 105,500 miles..

5.0

Ricktwuhk

Which is not the Ford recommended break-in... Yes, your truck did not blow up. OP wants to know the recommended break-in instructions.

Beo-Chin

Right in the Manual like you say. I've bought several vehicles where a dealer trade was involved and i was the one going to get it. When i bought my Mustang it took 6 hours to get to the trading dealer and there is no way somebody else is going to drive it with the cruise control on for hours on end, which was mostly Interstate.