Fly in drive home question

[Opus]

Well, I95 in DC at the right time of day will keep you under 55, 45, 35 for a while...

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[Retired Jeeper]

I had a similar situation when I picked up my JL. Instead of taking the interstate route home which would have been 446 miles and taken 4:45, I took 2-lane roads the entire way, drove 406 miles, and it took me 4:50. Got to see a lot of corn fields and numerous small towns I'd never seen before and likely never will see again - ha! When I got home, I considered break-in complete.

 

[Dusty Dude]

I flew to Nashville, drove the first 50 miles on back roads, then hit the expressway with a vengence all the way to Colorado. NO cruise and it’s all good.

 

[Trails]

Well, I95 in DC at the right time of day will keep you under 55, 45, 35 for a while...

You misspelled "5" . .. We lived in that hall hole for an while. DC burbs in VA. So glad to get out of there.

 

[Trails]

For those who ordered an out of state Jeep and flew in to pick up and drive home; how did you handle the “break in period” as stated in owners manual?

Just follow the break-in instructions. There is no rule that you have to be near home to do it. Leave extra travel time to get home to account for the slower parts of the break in. We bought our Jeep about 1,050 miles from home. Get off the interstate, enjoy the trip, and take your time.

 

[zouch]

what i got out of that (and what i did) was Continually Vary Speeds *and* Load, gradually increasing both, with a little full-bore acceleration as soon as it was up to full operating temps.

remember there's a lot of things breaking in to fit against each other for the first time other than just the engine; seals, gears, pads and rotors, etc.
and the gear companies will tell you gears like a few cool-down cycles during the early miles.

Thanks for all the input. The trip will be from DC to Chicago basically.
I was curious about the interstate travel mostly.
My last year, 2015, was bought new but local so varying speed and not driving too fast was easy.

Well owners manual has statements about no driving over 50-55 mph for 1st 500 miles.
Here’s what the manual states.

“Break-In Recommendations

• Initial 60 Miles (100 km): Drive moderately. While higher speeds are acceptable later, keeping speeds lower during this initial phase is recommended.
• First 300 Miles (500 km): Continue to drive moderately. Speeds up to 50 or 55 mph (80 or 90 km/h) are desirable.
• Vary Speeds: Avoid maintaining a single, constant speed for long periods (avoid heavy cruise control use).
  
  
• Acceleration: While cruising, brief full-throttle acceleration within local traffic laws is beneficial for seating the piston rings. “

 

[pablo_max3045]

Floor it as much as possible. Get it up to 90+ and keep it there. Ensures that the engine is properly warmed up right out of the gate!

No, do not do this.

The correct procedure is to break the brakes in at the same time with full emergency stops after getting past 90.

 

[brandofamily]

I had a similar situation when I picked up my JL. Instead of taking the interstate route home which would have been 446 miles and taken 4:45, I took 2-lane roads the entire way, drove 406 miles, and it took me 4:50. Got to see a lot of corn fields and numerous small towns I'd never seen before and likely never will see again - ha! When I got home, I considered break-in complete.

I’m looking at that type of plan. Normal interstate route is 12-ish hours I think. Not sure on non- in

 

[brandofamily]

what i got out of that (and what i did) was Continually Vary Speeds *and* Load, gradually increasing both, with a little full-bore acceleration as soon as it was up to full operating temps.

remember there's a lot of things breaking in to fit against each other for the first time other than just the engine; seals, gears, pads and rotors, etc.
and the gear companies will tell you gears like a few cool-down cycles during the early miles.

Ya I was thinking gears too.

 

[Renostever]

For those who ordered an out of state Jeep and flew in to pick up and drive home; how did you handle the “break in period” as stated in owners manual?

even if you drive a consistent speed if the terrain is varied so will the rpm’s.

 

[SlickRicksWilly]

I ignored the break in procedure and drove it normal.

 

[roaniecowpony]

Thanks for all the input. The trip will be from DC to Chicago basically.
I was curious about the interstate travel mostly.
My last year, 2015, was bought new but local so varying speed and not driving too fast was easy.

Well owners manual has statements about no driving over 50-55 mph for 1st 500 miles.
Here’s what the manual states.

“Break-In Recommendations

• Initial 60 Miles (100 km): Drive moderately. While higher speeds are acceptable later, keeping speeds lower during this initial phase is recommended.
• First 300 Miles (500 km): Continue to drive moderately. Speeds up to 50 or 55 mph (80 or 90 km/h) are desirable.
• Vary Speeds: Avoid maintaining a single, constant speed for long periods (avoid heavy cruise control use).
  
• Acceleration: While cruising, brief full-throttle acceleration within local traffic laws is beneficial for seating the piston rings. “

This is the single most important part of "break-in". Most people think babying an engine is required. That's simply not the case. Bearings don't require "break-in". The rings are really the most important component that needs "break-in". In some cases, if you baby it and the rings don't seat before glazing occurs (a normal process of glazing occurs from fuel and oil products getting baked onto the bore), the rings will excessively leak compression and combustion products into the crankcase, and oil consumption will be higher than normal. The crosshatch honing pattern put into the bore during manufacturing is intended to abrade the rings at a specific rate to wear the rings into full contact with the bore, before glazing prevents further wear on the rings. If you miss this window during the break-in period, you don't get a second chance.

The 3000-5000 rpm range is where the maximum torque and cylinder pressure occur. Rings are a dynamic seal and require cylinder pressure to force the ring against the bore. During break-in, high force of the cylinder pressure helps wear in the rings appropriately. Most of the ring wear should occur in the first few hundred miles, before glazing has had a chance to build up on the cylinder walls.

 

[Terrymo]

This is the single most important part of "break-in". Most people think babying an engine is required. That's simply not the case. Bearings don't require "break-in". The rings are really the most important component that needs "break-in". In some cases, if you baby it and the rings don't seat before glazing occurs (a normal process of glazing occurs from fuel and oil products getting baked onto the bore), the rings will excessively leak compression and combustion products into the crankcase, and oil consumption will be higher than normal. The crosshatch honing pattern put into the bore during manufacturing is intended to abrade the rings at a specific rate to wear the rings into full contact with the bore, before glazing prevents further wear on the rings. If you miss this window during the break-in period, you don't get a second chance.

The 3000-5000 rpm range is where the maximum torque and cylinder pressure occur. Rings are a dynamic seal and require cylinder pressure to force the ring against the bore. During break-in, high force of the cylinder pressure helps wear in the rings appropriately. Most of the ring wear should occur in the first few hundred miles, before glazing has had a chance to build up on the cylinder walls.

I drove it back from L.A. where as you know freeway traffic goes from 90 to 30 to 0 mph every few minutes. Then drove it hard over the Grapevine. I think that checked all the boxes and my 3.6 should last 300k miles right?

 

[roaniecowpony]

I drove it back from L.A. where as you know freeway traffic goes from 90 to 30 to 0 mph every few minutes. Then drove it hard over the Grapevine. I think that checked all the boxes and my 3.6 should last 300k miles right?

Well, the ring seal should last 300k, anyway.

 

[rickinAZ]

I had a similar situation when I picked up my JL. Instead of taking the interstate route home which would have been 446 miles and taken 4:45, I took 2-lane roads the entire way, drove 406 miles, and it took me 4:50. Got to see a lot of corn fields and numerous small towns I'd never seen before and likely never will see again - ha! When I got home, I considered break-in complete.

Help me make sense of this. From point A to Point B, the Eisenhower Interstate system is 10% longer than the original backroad route? And...the Interstate route, with its presumably 65 mph speed limits is only 5 minutes faster than the two-lane roads? And...there's the near 100mph average speed.

The civil engineers must have been snoozing when that Interstate stretch was laid out in 1955.

Sorry. I couldn't resist.
[you must have a typo in there somewhere. Happens to me all the time]

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