2013, Break it in Right - Floor it! - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 12-20-2012, 11:09 AM   #1
Jeeper
 
Reece's Avatar
 
Join Date: Dec 2012
Location: Houston, Eastwood
Posts: 167
2013, Break it in Right - Floor it!

I'm showing my age now. Evidently these new Pentastar 3.6L engines don't need an extended break-in period? The book says drive it moderately for 300 miles. After the initial 60 miles, drive it at highway speeds and while cruising, brief wide-open throttle acceleration aids the break in. This thing is so fast, "brief" is about all I can manage on the freeways in Houston.
I'm loving my first Wrangler!

__________________
Previous Jeeps:
'49 Willys Jeepster
'77 Wagoneer
'96 Grand Cherokee
'01 Cherokee
Reece is offline   Quote Quick Reply
Old 12-20-2012, 11:26 AM   #2
Jeeper
 
jkmohican's Avatar
 
Join Date: Aug 2012
Location: Detroit, Michigan
Posts: 1,236
I have a family member that works for Chystler in a testing department for Jeep. He said that (this is about to hurt) when testing all the newer vehicles, weither its the wrangler or cherokee, they floor them all the way and slam the brakes several times to each vehicle. They have made engines in todays world to with stand a hard break in peroid, so just remeber that it came out of the factory already fully tested. They do this test to all vehicles now a days. Side note, just because they do these tests, i still dont think its a good idea to floor A newer vehicle until 1000 miles. If its new, and your planning to keep it for awhile, why work it hard? Enjoy it!

jkmohican is offline   Quote Quick Reply
Old 12-20-2012, 12:25 PM   #3
Jeeper
 
Join Date: Aug 2012
Location: Connecticut.
Posts: 62
I had no choice. The highway was my only way home from the dealer. No break in for me
__________________
2013 JKU Sport S in Black
Paul10 is offline   Quote Quick Reply
Old 12-20-2012, 12:37 PM   #4
Jeeper
 
ohioviper's Avatar
 
Join Date: Sep 2012
Location: Chillicothe, Ohio
Posts: 1,734
I let mine off easy for first 500 miles then balls to the wall.
__________________

2013 JK mine
2000 TJ son's
ohioviper is offline   Quote Quick Reply
Old 12-20-2012, 01:37 PM   #5
Jeeper
 
Join Date: Dec 2012
Posts: 16
Ex service tech. Used to build engines too.

Vary speed and break it in fairly hard... watch for excessive heat tho. Change oil soonish to get the crap out.
JeffMan is offline   Quote Quick Reply
Old 12-20-2012, 01:59 PM   #6
Jeeper
 
Lithium Lotus's Avatar
 
Join Date: Aug 2010
Location: Ohio
Posts: 845
Quote:
I have a family member that works for Chystler in a testing department for Jeep. He said that (this is about to hurt) when testing all the newer vehicles, weither its the wrangler or cherokee, they floor them all the way and slam the brakes several times to each vehicle. They have made engines in todays world to with stand a hard break in peroid, so just remeber that it came out of the factory already fully tested. They do this test to all vehicles now a days. Side note, just because they do these tests, i still dont think its a good idea to floor A newer vehicle until 1000 miles. If its new, and your planning to keep it for awhile, why work it hard? Enjoy it!
I'd like to be the guy that gets to break in the new Viper.
Lithium Lotus is offline   Quote Quick Reply
Old 12-20-2012, 02:04 PM   #7
Jeeper
 
CampThree1982's Avatar
 
Join Date: Nov 2012
Location: North Carolina
Posts: 291
They do the same things to motorcycles at the factory. I'd never beat on a new vehicle that I bought but a rental car now THAT's a different story
__________________
MSgt USMC (Ret)
1981-2004

2013 Rubicon 2 dr, Commando Green
2002 Harley Davidson FXST Softail, Vivid Black
2007 Harley Davidson FLHX Street Glide, Midnight Pearl
CampThree1982 is offline   Quote Quick Reply
Old 12-20-2012, 04:00 PM   #8
Jeeper
 
MikeK46's Avatar
 
Join Date: Mar 2012
Location: Long Island, NY
Posts: 1,626
Images: 4
Quote:
Originally Posted by jkmohican View Post
I have a family member that works for Chystler in a testing department for Jeep. He said that (this is about to hurt) when testing all the newer vehicles, weither its the wrangler or cherokee, they floor them all the way and slam the brakes several times to each vehicle. They have made engines in todays world to with stand a hard break in peroid, so just remeber that it came out of the factory already fully tested. They do this test to all vehicles now a days. Side note, just because they do these tests, i still dont think its a good idea to floor A newer vehicle until 1000 miles. If its new, and your planning to keep it for awhile, why work it hard? Enjoy it!
Quote:
Originally Posted by ohioviper View Post
I let mine off easy for first 500 miles then balls to the wall.
Quote:
Originally Posted by CampThree1982 View Post
They do the same things to motorcycles at the factory. I'd never beat on a new vehicle that I bought but a rental car now THAT's a different story
Actually, the best way to break-in a new engine is to drive it hard (lots of full-throttle operation within the first 50 miles). One of the main reasons is piston rings. If you go easy on it you're not creating enough pressure to force the rings out into full contact with the cylinder wall, which may cause uneven wear and eventually lead to blow-by.

The high build quality of a modern engine like the PentaStar shortens the window of opportunity that you have to "seat the rings," making it even more important to do the hard acceleration right off the bat.

"The Problem With "Easy Break In" ...If the rings aren't forced against the walls soon enough, they'll use up the roughness before they fully seat. Once that happens there is no solution but to re-hone the cylinders, install new rings and start over again."
http://www.mototuneusa.com/break_in_secrets.htm
__________________
12JK
MikeK46 is offline   Quote Quick Reply
Old 12-20-2012, 05:39 PM   #9
Jeeper
 
jkmohican's Avatar
 
Join Date: Aug 2012
Location: Detroit, Michigan
Posts: 1,236
Quote:
Originally Posted by Lithium Lotus

I'd like to be the guy that gets to break in the new Viper.
As would i lol
jkmohican is offline   Quote Quick Reply
Old 12-20-2012, 05:50 PM   #10
Jeeper
 
flyinion's Avatar
 
Join Date: Sep 2011
Location: Sacramento, CA
Posts: 1,360
I thought I read around here once that the engines themselves are fully broken in already and the "break in" period is actually for the drivetrain components instead?
__________________
2012 JKU Sport S in BFG:
Max Tow, LSD, M/T, Connectivity, Infinity, Hard Top, Step Rails
flyinion is offline   Quote Quick Reply
Old 12-20-2012, 06:25 PM   #11
I'd like a cheaper hobby

WF Supporting Member
 
ThingsAbove's Avatar
 
Join Date: Mar 2012
Location: NC
Posts: 796
Images: 65
Drive it like you stole it...
ThingsAbove is offline   Quote Quick Reply
Old 12-20-2012, 06:37 PM   #12
Jeeper
 
steve66's Avatar
 
Join Date: Apr 2012
Location: sanford, florida
Posts: 381
I took my mustang gt straight to the strip from the dealership, i had 17 miles on it when i made my first pass. Didnt take the Jeep to the strip, but opened it up pretty hard with 3 miles on it.
__________________
-----------------
2012 Wrangler Sport (crush) sold!
2010 Carolla S
2009 Kawasaki Ninja 650
1965 Oldsmobile 442
steve66 is offline   Quote Quick Reply
Old 12-20-2012, 06:38 PM   #13
Jeeper
 
ltsrapcon's Avatar
 
Join Date: Jun 2012
Location: Johnstown PA
Posts: 462
Quote:
Originally Posted by ThingsAbove View Post
Drive it like you stole it...
You know the guy who test drove it before you bought it did.

I put about 100 miles on mine in the first day or so then hooked up a 16ft trailer loaded with stuff and moved from UT to PA. At 7k now and no problems.
ltsrapcon is offline   Quote Quick Reply
Old 12-20-2012, 07:17 PM   #14
Jeeper
 
steve66's Avatar
 
Join Date: Apr 2012
Location: sanford, florida
Posts: 381
Nobody drove mine before i bought it, thats why i order from the factory every time, lol
__________________
-----------------
2012 Wrangler Sport (crush) sold!
2010 Carolla S
2009 Kawasaki Ninja 650
1965 Oldsmobile 442
steve66 is offline   Quote Quick Reply
Old 12-20-2012, 08:14 PM   #15
Jeeper
 
CampThree1982's Avatar
 
Join Date: Nov 2012
Location: North Carolina
Posts: 291
Quote:
Originally Posted by steve66 View Post
Nobody drove mine before i bought it, thats why i order from the factory every time, lol
Before I ordered mine I had the chance to buy a 2012 (new) Rubicon on the lot. The dealer said it was new but I asked why it had 1,600 miles on it. They said it was a loaner for Jeep owners (what a croc). I could only imagine what those 1,600 miles might have been like so I passed.
__________________
MSgt USMC (Ret)
1981-2004

2013 Rubicon 2 dr, Commando Green
2002 Harley Davidson FXST Softail, Vivid Black
2007 Harley Davidson FLHX Street Glide, Midnight Pearl
CampThree1982 is offline   Quote Quick Reply
Old 12-20-2012, 08:29 PM   #16
Newb
 
Join Date: Oct 2012
Posts: 10
Images: 1
Quote:
Originally Posted by steve66 View Post
Nobody drove mine before i bought it, thats why i order from the factory every time, lol
Those factory miles are the hardest miles put on .
JEFFJEEPWRANGLER is offline   Quote Quick Reply
Old 12-20-2012, 08:36 PM   #17
Jeeper
 
Join Date: Dec 2010
Posts: 2,577
Quote:
Originally Posted by MikeK46 View Post
Actually, the best way to break-in a new engine is to drive it hard (lots of full-throttle operation within the first 50 miles). One of the main reasons is piston rings. If you go easy on it you're not creating enough pressure to force the rings out into full contact with the cylinder wall, which may cause uneven wear and eventually lead to blow-by.

The high build quality of a modern engine like the PentaStar shortens the window of opportunity that you have to "seat the rings," making it even more important to do the hard acceleration right off the bat.

"The Problem With "Easy Break In" ...If the rings aren't forced against the walls soon enough, they'll use up the roughness before they fully seat. Once that happens there is no solution but to re-hone the cylinders, install new rings and start over again."
Break In Secrets--How To Break In New Motorcycle and Car Engines For More Power
From what my engine builder told me, the key isn't so much the acceleration as the deceleration. Close the throttle sharply at 5500 rpm or so and let the engine braking take it down to 2500, repeat, repeat, repeat. That was on a traditional Pontiac V8 so take it FWIW.
i82much is offline   Quote Quick Reply
Old 12-20-2012, 08:48 PM   #18
Jeeper
 
Join Date: Nov 2012
Location: Iron Mountain, MI
Posts: 96
Quote:
Originally Posted by JeffMan View Post
Ex service tech. Used to build engines too.

Vary speed and break it in fairly hard... watch for excessive heat tho. Change oil soonish to get the crap out.
Quote:
Originally Posted by MikeK46 View Post
Actually, the best way to break-in a new engine is to drive it hard (lots of full-throttle operation within the first 50 miles). One of the main reasons is piston rings. If you go easy on it you're not creating enough pressure to force the rings out into full contact with the cylinder wall, which may cause uneven wear and eventually lead to blow-by.

The high build quality of a modern engine like the PentaStar shortens the window of opportunity that you have to "seat the rings," making it even more important to do the hard acceleration right off the bat.

"The Problem With "Easy Break In" ...If the rings aren't forced against the walls soon enough, they'll use up the roughness before they fully seat. Once that happens there is no solution but to re-hone the cylinders, install new rings and start over again."
Break In Secrets--How To Break In New Motorcycle and Car Engines For More Power

I've been trying to convince people of this for many years; some listen, others don't. And as the article in the link points out, the "window of opportunity" is even smaller than it used to be.
__________________
Bilge is offline   Quote Quick Reply
Old 12-20-2012, 08:55 PM   #19
Member
 
Join Date: Sep 2010
Location: Kearneysville, WV
Posts: 3,573
I ordered mine and it had 15 miles on it when I took delivery. They told me ahead of time they take every vehicle out to the gas station and put about 10 miles on them to make sure they're operating correctly. They told me they want to be sure they're not handing the keys of a vehicle with issues from the factory to a customer.

Not sure what kind of miles were put on it...
Con Artist is offline   Quote Quick Reply
Old 12-20-2012, 08:57 PM   #20
Jeeper
 
Lusus_Naturae's Avatar
 
Join Date: Oct 2012
Location: OKC, missing WI
Posts: 2,093
If this holds true, I feel a bit better. I ran short on time after closing the deal and had to take the highway from the dealer to home to work asap. I was feeling bit bad about it until now. I would prefer to break it in at more varying speeds, not like it didn't get varied speeds and all over the first couple hundred though.
Lusus_Naturae is offline   Quote Quick Reply
Old 12-20-2012, 09:01 PM   #21
Jeeper
 
Join Date: Nov 2012
Location: Iron Mountain, MI
Posts: 96
Quote:
Originally Posted by i82much View Post
From what my engine builder told me, the key isn't so much the acceleration as the deceleration. Close the throttle sharply at 5500 rpm or so and let the engine braking take it down to 2500, repeat, repeat, repeat. That was on a traditional Pontiac V8 so take it FWIW.
That's the method for a carburated engine. Closing the throttle sharply at high RPM creates a sudden high vacuum situation that sucks a bunch of raw fuel through the idle circuit in the carburator and "washes" the rings with gasoline, which increases the friction between the rings and the freshly honed cylinder walls. This aids in breaking in the rings. Then when you get back down to a lower RPM, flooring it causes the accelerator pump to dump a bunch of raw fuel washing the rings...rinse and repeat.

Since fuel injected engines don't have those overly rich points to exploit and cylinder honing is finer, you can see how the window of seating the rings is much smaller than it used to be.
__________________
Bilge is offline   Quote Quick Reply
Old 12-20-2012, 09:05 PM   #22
Jeeper
 
Join Date: Oct 2012
Posts: 253
I break in my motorcycles like that, haven't done it with cars...i think either way is acceptable, my dad's corolla was purchased new and he has never taken it above 3K RPM i know that..it's got 226K miles now and still runs great...


If you want your cars/jeeps to last, the key is maintenance, and let engine warm up properly before flogging it
__________________
2013 Clear Coat White, 3.73 gears, 2dr 3pedals...

Spool is offline   Quote Quick Reply
Old 12-23-2012, 07:44 AM   #23
Jeeper
 
Reece's Avatar
 
Join Date: Dec 2012
Location: Houston, Eastwood
Posts: 167
Quote:
Change oil soonish to get the crap out.
I was wondering about this. Is the factory-installed oil conventional or synthetic? I was thinking about not waiting for the "oil change" light and changing oil early with a synthetic like Mobile 1. Is there a board consensus on this one?
__________________
Previous Jeeps:
'49 Willys Jeepster
'77 Wagoneer
'96 Grand Cherokee
'01 Cherokee
Reece is offline   Quote Quick Reply
Old 12-23-2012, 08:05 AM   #24
Jeeper
 
RoadiJeff's Avatar
 
Join Date: Dec 2012
Location: St. Louis, MO
Posts: 2,134
The User Guide that I downloaded recommends the following break-in procedure and we plan on doing it that way.

ENGINE BREAK-IN RECOMMENDATIONS
• 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 break-in. Wide-open throttle acceleration in low gear can be
detrimental and should be avoided.
• The engine oil installed in the engine at the factory is a high-quality energy
conserving type lubricant. Oil changes should be consistent with anticipated
climate conditions under which vehicle operations will occur. For the recommended
viscosity and quality grades, refer to “Maintaining Your Vehicle”.

RoadiJeff is offline   Quote Quick Reply
Old 12-23-2012, 10:02 AM   #25
Jeeper
 
Join Date: Sep 2012
Location: Payson,AZ
Posts: 240
Quote:
Originally Posted by Reece View Post
I was wondering about this. Is the factory-installed oil conventional or synthetic? I was thinking about not waiting for the "oil change" light and changing oil early with a synthetic like Mobile 1. Is there a board consensus on this one?
I am certain it is conventional - for 2013 that would be 5w-20.
HRR1 is offline   Quote Quick Reply
Old 12-23-2012, 10:08 AM   #26
Jeeper
 
Join Date: Sep 2012
Location: Payson,AZ
Posts: 240
Change it when you want to as you will never get consensus here. Use whatever oil you want also for the same reason. Search oil or oil change interval and you can read the full range of opinion.

HRR1 is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




» Featured Product

All times are GMT -5. The time now is 07:14 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC