Break In Period for those Picking Up

[asdf]

It may have been said before, but I think the driving moderate is for breaking in the drivetrain and the WOT may be for the rings.

Exhibit gear break-in procedure: https://www.yukongear.com/blogs/the...lRvLyGPkqVyfoWsJFEHYUYar8Zyh1Sp9oydDUMIVoGQK5

 

[testerdahl]

I've seen that video and its got good information, unfortunately what an engineer thinks and what happens in real world are not always the same.

I’m continually amazed at people who willingly purchase new vehicles, spending tens of thousands of dollars and then immediately question whether the engineer has any clue what they are talking about. If you don’t trust them, why did you buy a vehicle from them?

Honestly, I wasn’t going to reply, but man, you have a collection of posts that really are frustrating to read.

 

[RamFan]

I’m continually amazed at people who willingly purchase new vehicles, spending tens of thousands of dollars and then immediately question whether the engineer has any clue what they are talking about. If you don’t trust them, why did you buy a vehicle from them?

Honestly, I wasn’t going to reply, but man, you have a collection of posts that really are frustrating to read.

Yup! When they do these durability tests, they abuse them to the extreme. They know exactly what they’re talking about.

My nationally known and respected engine builder for my $15k 363 SBF…said all the old school stuff is just that. The improvement in piston/ring technology, improved materials etc. He said after you get it running, flog it! He said if the rings don’t set in the first couple of minutes, they never will.

And that’s all you need to worry about. You don’t run an engine to increase rod or main bearing clearances etc. as you set them where you want them to be. It’s not built with too tight of clearances, expecting it to “loosen up” as you would be wearing bearing material away which would be awful.

You are only concerned about the rings.

Chris

Edit:

PS. My Quick Performance 9” rear end, said just give it a couple of heat cycles and 100 miles or so and again, flog it after that. That was a pretty penny too and I didn’t buy these items to throw my money away.

 

[testerdahl]

Yup! When they do these durability tests, they abuse them to the extreme. They know exactly what they’re talking about.

My nationally known and respected engine builder for my $15k 363 SBF…said all the old school stuff is just that. The improvement in piston/ring technology, improved materials etc. He said after you get it running, flog it! He said if the rings don’t set in the first couple of minutes, they never will.

And that’s all you need to worry about. You don’t run an engine to increase rod or main bearing clearances etc. as you set them where you want them to be. It’s not built with too tight of clearances, expecting it to “loosen up” as you would be wearing bearing material away which would be awful.

You are only concerned about the rings.

Chris

I have a 1962 C-10 with a new 375 HP V8 engine. People love to say to me, "Isn't that truck great that you can literally sit in the engine bay to work on it versus the new stuff that you have to pull the cab off?" My response is always, "yeah, except on my '62 you HAVE to constantly work on it and my newer trucks I NEVER have to work on them."

 

[asdf]

It would have been nice if they explained the "why" behind the instructions in the manual: "A long break-in period is not required for the engine and drivetrain (transmission and axle) in your vehicle. Drive moderately during the first 300 miles (500 km). After the initial 60 miles (100 km), speeds up to 50 or 55 mph (80 or 90 km/h) are desirable. While cruising, brief full-throttle acceleration within the limits of local traffic laws contributes to a good breakin. Wide-open throttle acceleration in low gear can be detrimental and should be avoided."

I mean "driving moderately" and "brief full-throttle accelerations" don't seem to comport with each other and leaves questions.

I'm going to have to assume based on outside information, part of break in is for drivetrain (gears), and the brief full-throttle acceleration (while cruising) is for the rings. Based on the information I've read, you don't want to overheat gears/gear oil during break-in, and because heat is generated during break in due to surfaces wearing-in, that's easier to do. I assume this is why there is a 300 mile break in period where you shouldn't go over "50 or 55." It doesn't say if the "brief full throttle acceleration" should take place during or after the first 300 miles - just that it should take place "within the limits of local traffic laws." I guess that means after the 300 miles, 50-55 mph guidance? From reading other sources, such as this clip regarding break-in for the Ford GT 350 engine, which has the same PTWA cylinder lining process, I gather the full-throttle acceleration but not over-revving the engine, is ring break-in protocol.

"Break-in with the PTWA cylinder bores is the same as with traditional ductile iron bores. Periodic hard acceleration in third or fourth gear at speed helps seat the rings. Keep revs conservative (under 6,000 rpm) when you’re wearing in the rings." https://www.diyford.com/ford-coyote-engine-cylinder-block-performance-guide/

At the end of the day the guidance is probably loose for a reason, but it's interesting to talk about even if beating a dead horse at this point.

 

[testerdahl]

It would have been nice if they explained the "why" behind the instructions in the manual: "A long break-in period is not required for the engine and drivetrain (transmission and axle) in your vehicle.

I buy a new truck every year. The manuals always have this line I left in your comment. I'd like for them to ditch all the rest of the paragraph. It is meaningless IMO and just causes extra confusion.

 

[testerdahl]

My truck does actually exist! LOL. Flying out and picking it up on Monday.

 

[RADA]

I'm seeing a decent amount of people talking about flying to their ordering dealer and driving their truck home. How are you all planning to handle the break in period here? Back roads?

I can putz around town for a bit, but wouldn't want to be the guy doing 50 on the freeway.

I have a 90-ish mile drive home.

I'll just stay in the right lane and crank up the tunes.

 

[OBYsRHO]

My truck does actually exist! LOL. Flying out and picking it up on Monday.
View attachment 4226

Nice! Hope all goes well you're gonna love it. Looking forward to the review video!

 

[asdf]

My truck does actually exist! LOL. Flying out and picking it up on Monday.
View attachment 4226

Heck yeah, as someone else said, loving the white/black contrast.

 

[RamFan]

I’ll be honest. We have kept it low rpms, gentle everything but we definitely exceeded 50mph in the first 60 miles. We had to drive home 30 miles on a two lane road. I wasn’t going to be 15mph below the speed limit. Sorry. And I’m certain it harmed nothing.

Again, no redline blasts or anything. We will vary throttle etc but as noted above if the rings are not set now, they never will.

We will keep it easy on acceleration from stops and won’t tow until 500 miles but that’s gear related not engine.

I feel, this is to prevent some yahoo(they’re everywhere, just look at the street takeovers) from hitting the 1320 the day after buying it and then towing an 8000lb trailer.

Chris

 

[OBYsRHO]

I’ll be honest. We have kept it low rpms, gentle everything but we definitely exceeded 50mph in the first 60 miles. We had to drive home 30 miles on a two lane road. I wasn’t going to be 15mph below the speed limit. Sorry. And I’m certain it harmed nothing.

Again, no redline blasts or anything. We will vary throttle etc but as noted above if the rings are not set now, they never will.

We will keep it easy on acceleration from stops and won’t tow until 500 miles but that’s gear related not engine.

I feel, this is to prevent some yahoo(they’re everywhere, just look at the street takeovers) from hitting the 1320 the day after buying it and then towing an 8000lb trailer.

Chris

Def wouldn't worry about it. Once I past 50 miles I did slow to hard pulls on the open highways. I'm almost 1k miles and yesterday was the first time I took it easy to get the best gas mileage. Got 15mgp 90% highway..yeah not worth it gonna go back to having fun lol

Engine feels so responsive and powerful and the tranny is just smooth and seamless I love it

 

[Banger]

I’ll be honest. We have kept it low rpms, gentle everything but we definitely exceeded 50mph in the first 60 miles. We had to drive home 30 miles on a two lane road. I wasn’t going to be 15mph below the speed limit. Sorry. And I’m certain it harmed nothing.

Again, no redline blasts or anything. We will vary throttle etc but as noted above if the rings are not set now, they never will.

We will keep it easy on acceleration from stops and won’t tow until 500 miles but that’s gear related not engine.

I feel, this is to prevent some yahoo(they’re everywhere, just look at the street takeovers) from hitting the 1320 the day after buying it and then towing an 8000lb trailer.

Chris

Same here. I'm at 600 miles now, and drove highway on the way home. No fast acceleration for the first 300 miles, but drove 75-80 mph within the first 100 miles. No WOT yet, but I've been having fun. I did some decent throttle accelerations from 60-80 mph.

 

[Cautionary Tale]

I’m continually amazed at people who willingly purchase new vehicles, spending tens of thousands of dollars and then immediately question whether the engineer has any clue what they are talking about. If you don’t trust them, why did you buy a vehicle from them?

Honestly, I wasn’t going to reply, but man, you have a collection of posts that really are frustrating to read.

Apologies that I've vexed you so. Life must be rough having to deal with people that have opinions and experiences that are so different from your own.

You can trust all the engineers you want. Those of us that have lived in the real world are acutely aware that engineers make mistakes, manufacturing make mistakes, and things get lost in translation. NASA had JBL and you can bet the engineers and people actually making the "stuff" disagreed on how best to accomplish the intended goals.

Free country buddy, you do you and I'll do me and we'll both be happiest for it. xoxo

 

[RamFan]

Apologies that I've vexed you so. Life must be rough having to deal with people that have opinions and experiences that are so different from your own.

You can trust all the engineers you want. Those of us that have lived in the real world are acutely aware that engineers make mistakes, manufacturing make mistakes, and things get lost in translation. NASA had JBL and you can bet the engineers and people actually making the "stuff" disagreed on how best to accomplish the intended goals.

Free country buddy, you do you and I'll do me and we'll both be happiest for it. xoxo

I want hugs n kisses!!

 

[Cautionary Tale]

I want hugs n kisses!!

Oh come on! You know those were meant for you

 

[Cautionary Tale]

I have a 1962 C-10 with a new 375 HP V8 engine. People love to say to me, "Isn't that truck great that you can literally sit in the engine bay to work on it versus the new stuff that you have to pull the cab off?" My response is always, "yeah, except on my '62 you HAVE to constantly work on it and my newer trucks I NEVER have to work on them."

You'd have to own a newer vehicle beyond a lease term to really have any kind of perspective here, freindo

 

[OU812]

Same here. I'm at 600 miles now, and drove highway on the way home. No fast acceleration for the first 300 miles, but drove 75-80 mph within the first 100 miles. No WOT yet, but I've been having fun. I did some decent throttle accelerations from 60-80 mph.

Ditto

 

[SDMatt]

THE "BREAK" in happens to most of us under 500 miles. Mine has been sitting for 3 weeks without any fix.

 

[MattH89]

Holy shit I just realized I posted this thread in September. How naive I was thinking I'd have to worry about a break in period any time soon. Still waiting, though supposedly it's shipped down to the railyard en route someday to Mark Dodge. I'm betting I have it delivered right around March 1.