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When Is The Engine Officially Broken In?

Irv

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Irv Enthusiast

Irv

Posted
Posted

Just curious when my new 5.3 is officially broken in?

I know the owners manual info is quite a bit different than what it was in my 97 owners manual? It states no elaborate break in is req'd but it also states about driving it no faster than 80km/h for the first 500 miles and don't hold it steady at any one set speed for very long, exactly how long are they referring too? Thanks.............Irv

redvett Senior Enthusiast

redvett

Posted
Posted

The 500 miles are initial break in but full break in does not occur until about 11-12K to really seat in the rings. The 500 mi should be observed before any towing is done.

 

Just curious when my new 5.3 is officially broken in?

I know the owners manual info is quite a bit different than what it was in my 97 owners manual? It states no elaborate break in is req'd but it also states about driving it no faster than 80km/h for the first 500 miles and don't hold it steady at any one set speed for very long, exactly how long are they referring too? Thanks.............Irv

REV353 Enthusiast

REV353

Posted
Posted

I have always based my break in off of one (the first) hour, up and down on the gas or in town driving, to seat the rings and let everything find it's home. Full break in after the first tank of gas.

MS3DALE Senior Enthusiast

MS3DALE

Posted
Posted
The 500 miles are initial break in but full break in does not occur until about 11-12K to really seat in the rings. The 500 mi should be observed before any towing is done.

 

Just curious when my new 5.3 is officially broken in?

I know the owners manual info is quite a bit different than what it was in my 97 owners manual? It states no elaborate break in is req'd but it also states about driving it no faster than 80km/h for the first 500 miles and don't hold it steady at any one set speed for very long, exactly how long are they referring too? Thanks.............Irv

 

 

+1 agreed

68haywagon Enthusiast

68haywagon

Posted
Posted

I drove mine nicely for 499 miles. Mile 499 to 500 was a full throttle run through the gears to 97mph :smoker: and a coasting slow down manually down shifting through the gears. Then an oil change at 1000mi.

 

Thats just me and under no advice from anyone.

 

Mike

96chevy7.4L Enthusiast

96chevy7.4L

Posted
Posted

I try to buy new vehicles just before vacation. An 1100 mile trip to NY at 75mph or in some cases more striaght thru stopping for nothing but gas is the true break in.......in my opinion.

Spurshot Senior Enthusiast

Spurshot

Posted
Posted

That 500 mile recommendation is the classic conservative recommendation. It accounts for many variables the manufacturer has data on for decades. Given today's manufacturing controls, especially for the cylinder finish, I'd bet the rings are seated, more times than not, by 50-100 miles. But there's always a stubborn cylinder or two that takes two or three times as long. On airplane engines, I've monitored cylinder head temps and literally watched the rings seat when the "fever broke". I've done a compression check before and after and verified the seating of the rings after the operating cyl head temps have come down. From my little knothole, I'd say the 500 miles of sticking with the recommended operation, is enough. After that, I drive it the way I please, which is not all that hard on an engine anyway. IMO, none of the rotating or other reciprocating parts needs a "break in" since they went to roller lifters.

Irv Enthusiast

Irv

Posted
  • Author
Posted
That 500 mile recommendation is the classic conservative recommendation. It accounts for many variables the manufacturer has data on for decades. Given today's manufacturing controls, especially for the cylinder finish, I'd bet the rings are seated, more times than not, by 50-100 miles. But there's always a stubborn cylinder or two that takes two or three times as long. On airplane engines, I've monitored cylinder head temps and literally watched the rings seat when the "fever broke". I've done a compression check before and after and verified the seating of the rings after the operating cyl head temps have come down. From my little knothole, I'd say the 500 miles of sticking with the recommended operation, is enough. After that, I drive it the way I please, which is not all that hard on an engine anyway. IMO, none of the rotating or other reciprocating parts needs a "break in" since they went to roller lifters.

 

Interesting read, thanks. I forgot about my motor having roller lifters? Is that the only rolling part in these new motors or do they also have roller rockers?

 

This past wknd was the first time I towed with it, it had about 2200km's on it and I only towed a full size atv, a youth atv, utility trailer and some food/clothing/gas etc, something around 1500-1800 lbs give or take so I know I was ok there.

I also did it's first oil change at 890km's and I am hoping to do another one tomorrow with about 2500km's on it now.

After that I think I will switch to Mobil-1 5W-30 synthetic and do another one just before winter? After that I will have full faith that the motor is broken in and I can continue on with it's once a year oil changes? (maybe just one more oil change in the spring first?)

brims Senior Enthusiast

brims

Posted
Posted
That 500 mile recommendation is the classic conservative recommendation. It accounts for many variables the manufacturer has data on for decades. Given today's manufacturing controls, especially for the cylinder finish, I'd bet the rings are seated, more times than not, by 50-100 miles. But there's always a stubborn cylinder or two that takes two or three times as long. On airplane engines, I've monitored cylinder head temps and literally watched the rings seat when the "fever broke". I've done a compression check before and after and verified the seating of the rings after the operating cyl head temps have come down. From my little knothole, I'd say the 500 miles of sticking with the recommended operation, is enough. After that, I drive it the way I please, which is not all that hard on an engine anyway. IMO, none of the rotating or other reciprocating parts needs a "break in" since they went to roller lifters.

 

Interesting read, thanks. I forgot about my motor having roller lifters? Is that the only rolling part in these new motors or do they also have roller rockers?

 

This past wknd was the first time I towed with it, it had about 2200km's on it and I only towed a full size atv, a youth atv, utility trailer and some food/clothing/gas etc, something around 1500-1800 lbs give or take so I know I was ok there.

I also did it's first oil change at 890km's and I am hoping to do another one tomorrow with about 2500km's on it now.

After that I think I will switch to Mobil-1 5W-30 synthetic and do another one just before winter? After that I will have full faith that the motor is broken in and I can continue on with it's once a year oil changes? (maybe just one more oil change in the spring first?)

 

 

Ya they have roller lifters, they haven't used flat tappet lifters for a long time now.

crepitus Enthusiast

crepitus

Posted
Posted
I try to buy new vehicles just before vacation. An 1100 mile trip to NY at 75mph or in some cases more striaght thru stopping for nothing but gas is the true break in.......in my opinion.

i would disagree with that statement. heat cycling helps with break-in of the trans and rear.

JNG Enthusiast

JNG

Posted
Posted

http://www.mototuneusa.com/break_in_secrets.htm

"Although the examples shown here are motorcycle engines, these principles apply to all 4 stroke engines"

"80% of the ring seating takes place in the first hour of running the engine"

 

"For the first 200 miles or so, get out into the country where you can vary the speed more

and run it through the gears!"

 

"The best method is to alternate between short bursts of hard acceleration and deceleration."

brims Senior Enthusiast

brims

Posted
Posted
http://www.mototuneusa.com/break_in_secrets.htm

"Although the examples shown here are motorcycle engines, these principles apply to all 4 stroke engines"

 

"80% of the ring seating takes place in the first hour of running the engine"

 

"For the first 200 miles or so, get out into the country where you can vary the speed more

and run it through the gears!"

 

"The best method is to alternate between short bursts of hard acceleration and deceleration."

 

I don't trust that guy as far as I can throw him.

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