Break-In Period? - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

SZOTSTA24 · 07-29-2010, 03:58 AM

Thanks HDDAN. Very informative

Monte Carlo Man · 07-30-2010, 02:41 PM

The answer is that for the first one hundred miles - you should keep your speed below 60 mph.

For the first 1500 miles, you should keep your speeds below 70 MPH and no towing.

BY the time you get to 3000 miles, the oil should be quite dirty because the job of the oil is to remove most everything that is floating around in the crankcase and because the rings have not yet seated.

Plasma Moly rings takes about 5,000 miles at 3,000 rpms to seat.

If you saw the pistons inside of the new engines, you would realize that they look alot like the race car pistons inside of a Nascar race engine.
Small skirts, flat tops, not much area for the rings to sit on. Very light stuff.

The engine comes with break in oil inside of it. It is a ZERO W 30 motor oil.
The first oil change should be with 5W30 motor oil and you should not use semi synthetic or full synthetic oil in the engine until it has at least 10,000 miles on it.

There is no break in period for the bearings.

The material that the bearings are made of is a real soft material, and if you ran the engine for more then 3 seconds without any oil pressure, the engine would seize and blow up. The moving parts do not physically ride on the bearings. They ride on a thin film of oil that is between the bearings and the moving parts.

The CNC theory is good to a point. The clearances on a New Camaro motor is about 1 1/2 thousands clearance on the main and rod bearings.
That is about as tight a tolerance you can get.
The problem is - the cam tunnel has to be machined to a exact tolerance or else if you get anything out of line - and if the cam bearings goes - the whole motor blows up. Everything is bored and then align honed to a exact tolerance.

The engine is not broken in from the factory.

The only time the engine is spun is when it is assembled to make sure that the bottom end is balanced properly - you can see pictures of it being done on most good web sites that gm has that shows a engine being assembled - even 50 years ago.

The key is that if you take care of it, it will last a long time.
If you don't change the oil at regular intervals and if you use junk oil, it's not going to last long.

Monte Carlo Man · 07-30-2010, 02:45 PM

EWR · 08-03-2010, 11:32 AM

"The engine comes with break in oil inside of it. It is a ZERO W 30 motor oil.
The first oil change should be with 5W30 motor oil and you should not use semi synthetic or full synthetic oil in the engine until it has at least 10,000 miles on it."

Ummm......doesn't it comes from the factory with Mobil1 synthetic in it?

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07-29-2010, 03:58 AM	#15
SZOTSTA24 Drives: Inferno Orange 2010 Camaro 2SS/RS Join Date: Nov 2008 Location: From: Los Angeles Posts: 686	Thanks HDDAN. Very informative

07-30-2010, 02:41 PM	#16
Monte Carlo Man Drives: Everything from soup to nuts Join Date: Jul 2010 Location: Western Pennsylvania Posts: 37	The answer is that for the first one hundred miles - you should keep your speed below 60 mph. For the first 1500 miles, you should keep your speeds below 70 MPH and no towing. BY the time you get to 3000 miles, the oil should be quite dirty because the job of the oil is to remove most everything that is floating around in the crankcase and because the rings have not yet seated. Plasma Moly rings takes about 5,000 miles at 3,000 rpms to seat. If you saw the pistons inside of the new engines, you would realize that they look alot like the race car pistons inside of a Nascar race engine. Small skirts, flat tops, not much area for the rings to sit on. Very light stuff. The engine comes with break in oil inside of it. It is a ZERO W 30 motor oil. The first oil change should be with 5W30 motor oil and you should not use semi synthetic or full synthetic oil in the engine until it has at least 10,000 miles on it. There is no break in period for the bearings. The material that the bearings are made of is a real soft material, and if you ran the engine for more then 3 seconds without any oil pressure, the engine would seize and blow up. The moving parts do not physically ride on the bearings. They ride on a thin film of oil that is between the bearings and the moving parts. The CNC theory is good to a point. The clearances on a New Camaro motor is about 1 1/2 thousands clearance on the main and rod bearings. That is about as tight a tolerance you can get. The problem is - the cam tunnel has to be machined to a exact tolerance or else if you get anything out of line - and if the cam bearings goes - the whole motor blows up. Everything is bored and then align honed to a exact tolerance. The engine is not broken in from the factory. The only time the engine is spun is when it is assembled to make sure that the bottom end is balanced properly - you can see pictures of it being done on most good web sites that gm has that shows a engine being assembled - even 50 years ago. The key is that if you take care of it, it will last a long time. If you don't change the oil at regular intervals and if you use junk oil, it's not going to last long.

08-03-2010, 11:32 AM	#18
EWR Drives: Soon:'11 Camaro Now:'01 Durango R/T Join Date: Jul 2010 Location: Houston Posts: 37	"The engine comes with break in oil inside of it. It is a ZERO W 30 motor oil. The first oil change should be with 5W30 motor oil and you should not use semi synthetic or full synthetic oil in the engine until it has at least 10,000 miles on it." Ummm......doesn't it comes from the factory with Mobil1 synthetic in it?