Break In - Avoiding the same speed for too long

[Cobra Commander]

I just drive it like I'm going to drive it. I've never had any issues.

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[clevernickname]

My dealer told me I didn't have to break it in. That new cars don't need this anymore... Are they wrong?? Am I screwed lol.

My old toyota rav4 C63 2012..was told to not go above 100km in the first 500km vary the speeds.

 

[thehunterooo]

I drove mine like normal right off the lot.

 

[Scorpion]

My dealer told me I didn't have to break it in. That new cars don't need this anymore... Are they wrong?? Am I screwed lol.

My old toyota rav4 C63 2012..was told to not go above 100km in the first 500km vary the speeds.

If they are wrong, only you will pay.

I found out by not varying speeds on an engine once and it created a dead spot in the RPM's that felt like a struggle to get past. What does it hurt to break in an engine proplerly? Doesn't hurt if you don't need to do it anymore. It does hurt if you still need to.

I will always break in an engine.

 

[davekro]

So I wonder how popular or accepted this new 'run it hard' break in that is described here is:
http://mototuneusa.com/break_in_secrets.htm

I'm 61, so old dog/ new tricks tends to doubt, but the 'theory' seems to make sense to me. I wish Ray and Tommy (CLick and Clack the tappit brothers )were on here to ask their opinion. I'd trust them.

I wonder what would be good a mainstream source for break in process for current day motors might be. Yea, yea, owners manual blah, blah. I want third party besides some guy on the net. And he looks tooo young to this older dude. :lol:

 

[Slow5oh]

I run all my new cars hard for break in. Need to set those rings!!

 

[davekro]

I run all my new cars hard for break in. Need to set those rings!!

I've heard other say the same thing. In line with the article link above. I'd be curious from you and others where you had been hearing the rational for this. IE sources you trust. It is just new to me, so the researcher in me would love to see semi current articles describing this (to dislodge 40-50 years of 'dated info'. I used to know Jack, but I have trouble remembering him sometimes these days. :doh:

 

[arghx7]

The main thing about a brand new engine is that it has higher friction than one that has been run in. As you put more hours on it the friction decreases. Less friction is better for power/torque and fuel economy.

 

[Vinny@JLTPerformance]

One thing I see often overlooked is heat cycles.

Manufactures put a mileage on breakin just for a guideline, I wouldn't recommend simply trying to put 500 miles on the car in 2-3 trips...where the car isn't shut off for any length of time. The engine will get a better break in with just normal driving, your normal routine where the car gets a chance to warm up and cool down for normal expansion of the pistons etc.

I will say the way companies are making engine internals now and things such as rings, the actually sealing process happens very quickly.

This is one of those subjects you ask 10 different people you'll get 10 different answers.

 

[Thinkn3D]

If they are wrong, only you will pay.

I found out by not varying speeds on an engine once and it created a dead spot in the RPM's that felt like a struggle to get past. What does it hurt to break in an engine proplerly? Doesn't hurt if you don't need to do it anymore. It does hurt if you still need to.

I will always break in an engine.

There are different parts of the engine that need to broken in.
Varying the rpm is to break in the cam(s) so they don't flat spot. Sounds like your cam(s) has a flat spot.

 

[davekro]

I will say the way companies are making engine internals now and things such as rings, the actually sealing process happens very quickly.

This is one of those subjects you ask 10 different people you'll get 10 different answers.

I was blown away how quickly the guy in the 'fast break in' link above said.
He said these new engines will set the type of break in you do (for the rings) in the first 20 miles!!!

Thanks Thinkin3d for the mention about cam break in. Easy to forget there are differing surfaces and types of break in required!

 

[Hack]

I bounced mine off the rev limiter today in first gear. I have 128 miles on my car.

Oops!

It's built to take it.

 

[Cobra Commander]

Oops!

It's built to take it.

Yeah. I'm not overly worried about it though. Like I said in one of my other posts I drive like I'm going drive it. I've never had any problems with any of my other cars or trucks. If I do run into any issues it just gives me another reason to upgrade.

 

[Hack]

Yeah. I'm not overly worried about it though. Like I said in one of my other posts I drive like I'm going drive it. I've never had any problems with any of my other cars or trucks. If I do run into any issues it just gives me another reason to upgrade.

Right, but my point was there's no reason to bounce it off the rev limiter at any time. The car is faster if you shift before you get there!

 

[JimmyTwoTimes]

Right, but my point was there's no reason to bounce it off the rev limiter at any time. The car is faster if you shift before you get there!

If you have the manual transmission...

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