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Re: Engine Break-In - Found the answer [Re: buster] #5210104 09/11/19 12:31 PM
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DGXR Offline
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Porsche engineer's statements contradict the ages-old method of doing a few full heat cycles, this is probably adapting to modern manufacturing and engineering principles. I keep moderate loads and varying RPM during the first few hundred miles, doing an early oil change, then gradually increasing to maximum power and redline runs at around 2,000 miles.

Deceleration (i.e. high vacuum in intake manifold and cylinders) plays a crucial role during the wear-in process.


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Re: Engine Break-In - Found the answer [Re: buster] #5210105 09/11/19 12:31 PM
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For the Nissan, the truck already had 63 miles on it. I was told the test drives are all the same (same one I went on), in which case there is little room for abuse. From the time I picked up the truck to present, I did all short trip/stop and go type driving. I kept rpms between 2k and 4k. I may have hit 5k once. Today I hit Nissan's 1,200 mile break-in mark and did 2 WOT's. At this point what is done is done. I saw no noticeable oil consumption the first 1k miles. EDGE has been in the last 200 miles.

I'm glad I came across this article though. It was the only article (FWIW) where an actual automotive engineer gave some insight into "why" they recommend not exceeding 4k. Like most things in life, moderation is often the best bet.


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Re: Engine Break-In - Found the answer [Re: DGXR] #5210115 09/11/19 12:50 PM
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Originally Posted by DGXR
Porsche engineer's statements contradict the ages-old method of doing a few full heat cycles, this is probably adapting to modern manufacturing and engineering principles. I keep moderate loads and varying RPM during the first few hundred miles, doing an early oil change, then gradually increasing to maximum power and redline runs at around 2,000 miles.

Deceleration (i.e. high vacuum in intake manifold and cylinders) plays a crucial role during the wear-in process.

How do diesel engines break in? I worked at a forklift dealership that leased forklifts, fleet cars, vans, pickups and class 8 vehicles . Engines break in fine without any voodoo. Travis ' post is gospel.


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Re: Engine Break-In - Found the answer [Re: KrisZ] #5210158 09/11/19 01:57 PM
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Originally Posted by KrisZ
Originally Posted by buster
With what we know, I will say that lugging the engine is far worse than a few WOT's.


Yes, I agree. I would also add compression braking as a benefit.

And with today's wide spread ratio automatics and CVTs, many engines not only spin at very low RPM, but they also don't do any compression braking, unless in sport mode or manually prompted.


Generally referred to as "vacuum pulls." If you can find a road with lots of foot hills and slip the automatic transmission into sport mode or manual mode so it rows down through the gears on decel and engine brakes, that is the Shining City on a Hill to strive for, for nice break-in runs. Goose it up the grade, let Sport Mode engine brake it on the down hill side. Lather, rinse, repeat. Living in the flat lands, could not find such a stretch of road for the GMC and F-150, had to settle for acel/decel runs on long sparsely driven flat roads, a certain stretch of a particular county road saw a lot of our two new vehicles this spring and summer.



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Re: Engine Break-In - Found the answer [Re: LoneRanger] #5210163 09/11/19 02:06 PM
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Originally Posted by LoneRanger
Originally Posted by KrisZ
Originally Posted by buster
With what we know, I will say that lugging the engine is far worse than a few WOT's.


Yes, I agree. I would also add compression braking as a benefit.

And with today's wide spread ratio automatics and CVTs, many engines not only spin at very low RPM, but they also don't do any compression braking, unless in sport mode or manually prompted.


Generally referred to as "vacuum pulls." If you can find a road with lots of foot hills and slip the automatic transmission into sport mode or manual mode so it rows down through the gears on decel and engine brakes, that is the Shining City on a Hill to strive for, for nice break-in runs. Goose it up the grade, let Sport Mode engine brake it on the down hill side. Lather, rinse, repeat. Living in the flat lands, could not find such a stretch of road for the GMC and F-150, had to settle for acel/decel runs on long sparsely driven flat roads, a certain stretch of a particular county road saw a lot of our two new vehicles this spring and summer.



thumbsup

South Jersey is pretty flat too. I'd have to go up to centra/north Jersey or Pennsylvania to find hills.


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Re: Engine Break-In - Found the answer [Re: buster] #5210216 09/11/19 03:10 PM
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I can imagine how frustrating for a new Porsche owner to have to baby it for 2k miles. When I bought my new Harley at Black Hills HD, it was really hard to vary the engine speeds on those wide open roads out there. I was on the 4 lane road going out of Rapid City to Mt. Rushmore. I had been driving the speed limit for a while and it was time to "vary the speed". I was going about 45 and cars were passing me looking at me like I was crazy. Very un natural.LOL

Re: Engine Break-In - Found the answer [Re: CT8] #5210377 09/11/19 06:41 PM
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Originally Posted by CT8
Originally Posted by DGXR
Porsche engineer's statements contradict the ages-old method of doing a few full heat cycles, this is probably adapting to modern manufacturing and engineering principles. I keep moderate loads and varying RPM during the first few hundred miles, doing an early oil change, then gradually increasing to maximum power and redline runs at around 2,000 miles.

Deceleration (i.e. high vacuum in intake manifold and cylinders) plays a crucial role during the wear-in process.

How do diesel engines break in? I worked at a forklift dealership that leased forklifts, fleet cars, vans, pickups and class 8 vehicles . Engines break in fine without any voodoo. Travis ' post is gospel.


The old German who was chief of cylinder kit engineering at Cummins when I worked there swore that if a new diesel engine was not ramped up to full power within 20 minutes of first start, it would not break in properly.

Last edited by A_Harman; 09/11/19 06:42 PM.

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Re: Engine Break-In - Found the answer [Re: ARCOgraphite] #5210382 09/11/19 06:44 PM
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Non pressure fed IMS bearing had nothing to do with it. Undersize bearings that could not handle the load was the culprit. Many Porsche owners changed oil at the recommended OCI of 15K miles which let acid accumulate and eat those undersize bearings, too. Toyota actually designed that car! Porsche needed help to stay alive and asked them to help. Strange world.

Last edited by willbur; 09/11/19 06:47 PM.
Re: Engine Break-In - Found the answer [Re: CT8] #5210402 09/11/19 07:05 PM
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Originally Posted by CT8

How do diesel engines break in? .

I used to get to bring brand new trucks to the yard. I would ride to vegas or Laughlin,NV with another driver. I would take possession of the truck there (saved on California taxes). I would drive over to the yard they had in NV. Hook to a set of trailers ,load them to the max legal 80000lbs and bring it home.


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Re: Engine Break-In - Found the answer [Re: buster] #5210659 09/12/19 06:06 AM
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The real question - does any of the break-in procedure really matter in the real world? I've owned many many cars from many many manufactures and I have never followed the break-in procedure. I drive the cars, I've never had an engine/transmission/moving part give me an issue related to improper break-in, I sell the car and I get a new car.


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Re: Engine Break-In - Found the answer [Re: PWMDMD] #5210669 09/12/19 06:23 AM
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Originally Posted by PWMDMD
The real question - does any of the break-in procedure really matter in the real world? I've owned many many cars from many many manufactures and I have never followed the break-in procedure. I drive the cars, I've never had an engine/transmission/moving part give me an issue related to improper break-in, I sell the car and I get a new car.


That’s the million dollar question. We don’t know.


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Re: Engine Break-In - Found the answer [Re: PWMDMD] #5210670 09/12/19 06:25 AM
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Originally Posted by PWMDMD
The real question - does any of the break-in procedure really matter in the real world? I've owned many many cars from many many manufactures and I have never followed the break-in procedure. I drive the cars, I've never had an engine/transmission/moving part give me an issue related to improper break-in, I sell the car and I get a new car.



Poor break-in can result in oil consumption and/or the engine will not reach its full potential. The first you'd notice but the vast majority if owners would not notice the second.

Of course there's engine break-in, there's vehicle break-in and finally driver break-in (I added this piece).


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Re: Engine Break-In - Found the answer [Re: BMWTurboDzl] #5210697 09/12/19 06:58 AM
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Originally Posted by BMWTurboDzl
Originally Posted by PWMDMD
The real question - does any of the break-in procedure really matter in the real world? I've owned many many cars from many many manufactures and I have never followed the break-in procedure. I drive the cars, I've never had an engine/transmission/moving part give me an issue related to improper break-in, I sell the car and I get a new car.



Poor break-in can result in oil consumption and/or the engine will not reach its full potential. The first you'd notice but the vast majority if owners would not notice the second.

Of course there's engine break-in, there's vehicle break-in and finally driver break-in (I added this piece).


Are you in the break it in hard camp?


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Re: Engine Break-In - Found the answer [Re: buster] #5210796 09/12/19 09:22 AM
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Originally Posted by buster
Originally Posted by BMWTurboDzl
Originally Posted by PWMDMD
The real question - does any of the break-in procedure really matter in the real world? I've owned many many cars from many many manufactures and I have never followed the break-in procedure. I drive the cars, I've never had an engine/transmission/moving part give me an issue related to improper break-in, I sell the car and I get a new car.



Poor break-in can result in oil consumption and/or the engine will not reach its full potential. The first you'd notice but the vast majority if owners would not notice the second.

Of course there's engine break-in, there's vehicle break-in and finally driver break-in (I added this piece).


Are you in the break it in hard camp?


Hard / Soft is somewhat subjective.

I'd best describe it as methodical engine loading during both acceleration and deceleration across the rpm range while for the most part staying within the max rpm suggested by the automaker.

Last edited by BMWTurboDzl; 09/12/19 09:22 AM.

“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Re: Engine Break-In - Found the answer [Re: DGXR] #5210799 09/12/19 09:26 AM
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Originally Posted by DGXR
Porsche engineer's statements contradict the ages-old method of doing a few full heat cycles, this is probably adapting to modern manufacturing and engineering principles. I keep moderate loads and varying RPM during the first few hundred miles, doing an early oil change, then gradually increasing to maximum power and redline runs at around 2,000 miles.

Deceleration (i.e. high vacuum in intake manifold and cylinders) plays a crucial role during the wear-in process.


Right but can you imagine the potential liability by recommending such a thing? "Porsche said I should break-in my engine by downshifting, I didn't know that downshifting into 3 at 80 mph would cause engine damage! My $500/hr attorney is going to have a field day with this."


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
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