Ok, I ordered new 4.6l from a 2000 mustang with 54,000 miles on it, for my 97, whos old engine crapped out. After 2 weeks, they finally finished installing it saturday! My question is, the mechanic said not to allow the revs to go above 2 1/2 rpms for the first 1,000 miles, and I want to know if this seems normal or rather long to y'all? I had a friend who had to get her engine replaced in her 4cy 99 saturn, and they told her just not to exced 50 miles per hr, for the first 500 miles. I have a 1 year/12,000 mile warenty on it, and I'm thinking that he might have extened the break in time to cover his ass. So anyone who has any experince with this that could help me out would be greatly appreciated.
New engine break in time
- Thread starter Aggie 08
- Start date
new 4.6l from a 2000 mustang with 54,000 miles on it
doesn't sound new to me, just don't go hard on the engine and don't wind it out for about 1000 miles, if it is completely fresh he may have put standard oil in and should've advised you that you could switch to syn after 1000 mile breakin
doesn't sound new to me, just don't go hard on the engine and don't wind it out for about 1000 miles, if it is completely fresh he may have put standard oil in and should've advised you that you could switch to syn after 1000 mile breakin
ProCharger GT
Member
I'd say 3K would be safe to not go above if the engine is new. But since you said it has 54K on it, then the rings should be seated already - you should be able to drive normally. I got about 600 miles on mine before it went on the dyno for a tune and it's holding up fine.
you don't have to break in that enigne at all. it's got 54k on it, think about it thats means I would be just about done breaking my car in now.
He should get a tune at somepoint, but his PCM will learn all it's going to learn within the first 100 miles.
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