Breaking in the motor?
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Launching!
Joined: May 2006
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Breaking in the motor? Alright, I just got a new Motor put in my car. It's not brand new, it has like 30,xxx miles on it. It looks pretty damn new though. It has new plugs wires, etc...I also got a new radiator.
Anyway, they told me to be easy on the car for about a week to let it "break" in. Does that make any sense? What would be the difference getting on it now, or in a week? As soon as it runs for a bit, isn't everything just set into place? I haven't floored it yet, but I just want to make sure I don't break anything, you know?
Anyway, they told me to be easy on the car for about a week to let it "break" in. Does that make any sense? What would be the difference getting on it now, or in a week? As soon as it runs for a bit, isn't everything just set into place? I haven't floored it yet, but I just want to make sure I don't break anything, you know?
On The Tree
Joined: Nov 2006
Posts: 181
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From: Corsicana, TX
okay, im confused...the engine has 30,xxx miles on it but it needs to be broken in...has the engine been sitting up for a long time or what? I mean on a engine with zero miles they set as soon as the engine fires rev it and hold at about 25 hundred rpms for about 30 mins, then change the oil ang check for metal then if no metal your good to go. But on a engine that has 30,xxx miles on it i would start it, and let it sit for about 10 to 15 minutes make sure it has good oil and oil psi. i hope i have helped in some way shape or form.
Launching!
Joined: Apr 2007
Posts: 217
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From: Montreal, Canada
Originally Posted by 383_LT1_1295
okay, im confused...the engine has 30,xxx miles on it but it needs to be broken in...has the engine been sitting up for a long time or what? I mean on a engine with zero miles they set as soon as the engine fires rev it and hold at about 25 hundred rpms for about 30 mins, then change the oil ang check for metal then if no metal your good to go. But on a engine that has 30,xxx miles on it i would start it, and let it sit for about 10 to 15 minutes make sure it has good oil and oil psi. i hope i have helped in some way shape or form.
engine break in 
that happened 30,000mi ago.
a fresh engine that has been machined properly,has a roller cam in it does not require any break in at all,now i will say this do not rev the engine past 3000 rpm till the rings seat.that usually happens within 30min of running,shut the engine off check for leaks,hanging or loose wires etc.let cool off for a while then go for a drive
now if you had a new clutch installed then yes take it easy for 300mi with normal driving.
when my very first engine was built i fired it up let it idle(i wanted to hear that cam talk all that stuff out the tailpipes)
my builder called me up and asked if i was gonna race my truck at the track,of course i said no way i gotta break it in,he laughed and said you better be at the track with that truck tonight.that 468" lasted 4years of a teenager pounding it before i detonated a piston on the spray.
that happened 30,000mi ago.
a fresh engine that has been machined properly,has a roller cam in it does not require any break in at all,now i will say this do not rev the engine past 3000 rpm till the rings seat.that usually happens within 30min of running,shut the engine off check for leaks,hanging or loose wires etc.let cool off for a while then go for a drive
now if you had a new clutch installed then yes take it easy for 300mi with normal driving.when my very first engine was built i fired it up let it idle(i wanted to hear that cam talk all that stuff out the tailpipes)
my builder called me up and asked if i was gonna race my truck at the track,of course i said no way i gotta break it in,he laughed and said you better be at the track with that truck tonight.that 468" lasted 4years of a teenager pounding it before i detonated a piston on the spray. 
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From: Decatur, TN (N-W of Athens)
They say, if you're going to beat on a engine for it's life, break it in hard. If you're going to baby it, break it in the "300 miles" way. Drive it easy for 150 miles, the drive quite a bit of highway for 150 miles. It is important to change the oil after the first 30mins or an hour of driving around, no matter how hard you are on it, because as said, you need to check for metal shavings. If none, then the first 150, change it, again at 300, again at 1000, and then your regular intervals. 3000 for conventional oil, 5000-7500 for synthetic (depending on brand, which pretty much determines the grade of oil it is. My friend goes around 10K on Amsoil, just changing out the filter @ 5K)
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Thread Starter
Launching!
Joined: May 2006
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Originally Posted by Formula350
They say, if you're going to beat on a engine for it's life, break it in hard. If you're going to baby it, break it in the "300 miles" way. Drive it easy for 150 miles, the drive quite a bit of highway for 150 miles. It is important to change the oil after the first 30mins or an hour of driving around, no matter how hard you are on it, because as said, you need to check for metal shavings. If none, then the first 150, change it, again at 300, again at 1000, and then your regular intervals. 3000 for conventional oil, 5000-7500 for synthetic (depending on brand, which pretty much determines the grade of oil it is. My friend goes around 10K on Amsoil, just changing out the filter @ 5K)
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Originally Posted by goodrich969
Go start it right now and peg the rpms at about 7k for a couple of minutes and do a few burnouts then 1 or 2 neutral drops and its broken in!!
and then buy a new rearend and tranny
Thread Starter
Launching!
Joined: May 2006
Posts: 267
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Originally Posted by goodrich969
Go start it right now and peg the rpms at about 7k for a couple of minutes and do a few burnouts then 1 or 2 neutral drops and its broken in!!
See everyone is getting the jist. lol if your going to get a new motor might as well do it BIG. with a rearend AND tranny lol then youll have a brand new car. OR, a totally trashed car, its a flip of the coin. haha