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Old 07-06-2006, 04:51 PM   #1
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Break in period for a Wrangler 4.0?

I know what the manual mentions, but what do you recommend for breaking in my 2006 Wrangler X 4.0? 1000 miles? 3000? I'd just like to know because I'm worried about driving it too hard before the break in period is finished. (Haven't gone above 4000 RPM yet) I had to drive it 300 miles from Oregon to Nevada when I bought it and was told to change the oil when I got back home. (So I did at 400 miles) The service department told me to change it again at 3000 miles, does that sound right for a new engine?

Since I'm asking idiotic questions, (and I know this varies depending on the outside temperature) how long is a good safe time to let your Jeep warm up before driving? If gas was a buck a gallon I'd warm it up for five minutes, but...

Thanks very much again for any answers to my stupid questions...

Best regards-

Nick

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Old 07-06-2006, 05:30 PM   #2
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Just drive it like your going to use it. You should never need more then 3,000 rpms anyway. And they told you right. Changing the oil within the 1st thousand miles is great, that is when you do the majority of break in. You definately want to get rid of the minute metal shavings, and put in fresh oil. Do it again at 3,000 miles, and every 3,000 after that. The worst way to break in a motor is at constant speed. Town driving is the best as it allows the piston rings to seat properly. But you are already past that point anyway. I have always broken in my machines the way I normally drive. Never had a problem with that yet. I also have never been one to wrap out the motor in every gear either.

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Old 07-06-2006, 06:15 PM   #3
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i hope mine hasn't been driven too hard before the break in period is finished because i let my dad drive my jeep and he flogged it! he got over 4,000 rpm's and was goin like 50 in 3rd gear! makes me mad! so i told him that it's probably not good for the jeep and he said "i've been drivin longer than you've been alive"
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Old 07-06-2006, 06:55 PM   #4
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Engines now days need very little break in time. You are doing the right thing with the oil changes.

As far as warming it up. There's no need for it. Just turn the key and go. Especially in the summer when it's warm. In the winter you might want to let it run a few minutes (depending on where you live) to let the heat warm up.
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Old 07-06-2006, 07:06 PM   #5
coilovers are damn flexy
 
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Quote:
Originally Posted by bigjeep
i hope mine hasn't been driven too hard before the break in period is finished because i let my dad drive my jeep and he flogged it! he got over 4,000 rpm's and was goin like 50 in 3rd gear! makes me mad! so i told him that it's probably not good for the jeep and he said "i've been drivin longer than you've been alive"
Tell your dad that ignorance does not have to be hereditary......just kidding........but that is a dumb reason to do anything. Slow and easy, low RPM's.......that is the scoop on long engine life. Regardless of age, and that is the way I do it because Abrahamn Lincoln did it that way. For goodness sakes, that is why we have a brain........use it, and don't abuse it.
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Old 07-07-2006, 12:26 AM   #6
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Thank you, again...

Really appreciate the advice, as always...
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Old 07-07-2006, 08:42 AM   #7
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I'm not an expert, I'm a girl. So take me with a grain of salt. But, I've NEVER let my Jeep warm up (except a really blistering -10 degree day up in Vermont which coincidentally was the first of many times I've almost flipped it.) But anyway. I've never had a problem. I don't baby my Jeep. They were built to endure a lot more than ALMOST any of us can dish out. (because I really think that Jeeptales gives his Jeep a run for it's money) As for the high RPMs... I wouldn't make it a continual habit, but I would think that towing something stupidly heavy would put more stress on the engine than the occassional RPM spike. But I would definately support the idea of not only keeping up with your oil changes, but tune-ups as well. Nothing irritates me more than a sputtering machine on a cold New England morning.

Here's my thought...
Everytime I think little girly thoughts like, "I need to swirve around that manhole cover because I might hurt my tires." or, "oh no.. I spent too much time putting my makeup on that now I have to fly to work." I say to myself, "Self, you're not exactly driving a Hundai." I think about those little guys in driving their jeeps through the rough terrain of the Outback in Austrailian on a daily basis. Or the Costa Ricans with their horrible streets and I hit the puddles as fast and hard as I can.

Don't get me wrong, I'm not saying abuse it. But half the fun of having the Jeep is breaking it and fixing it yourself.
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Old 07-07-2006, 11:14 AM   #8
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Sweet!
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Old 07-07-2006, 02:42 PM   #9
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Thank you!

I have no intention of redlining the motor or getting anywhere close. 3500 RPM is pretty much all it's seen so far. I'll be religious about the oil changes and tuneups, though.

Appreciate all the insight...
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Old 07-11-2006, 09:52 PM   #10
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It Won't Break!

TJ_Babe is right - there's absolutely no reason to baby it. Jeeps are so well built that they can "take a lickin' and keep on tickin." To see just what your Jeep can do, I suggest heading to a Jeep Jamboree and discovering just what your "beast" can accomplish. I can say this because I never dreamed just how hard my Jeep could work until I tested it and myself at a Jamboree. By the way, TJ_Babe, you'd like my wife - she treats her Jeep just like you do - no mercy!
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Old 07-11-2006, 10:29 PM   #11
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Old 07-12-2006, 07:23 AM   #12
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I was thinking April Fool's Day.

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