The scuff of flat tappets VS the rollers makes this correct, but break in is still fine for just that, break in. Todays syn oils cannot offer the protection flat tappets of old need...zinc phos is a critical part of scuff protection. We use a good conventional on most roller engines, but a high zinc/phos break-in additive for flat tappets.
For all, here is what the factory gives us on how to break them in.....quite a bit different than the owners manual:
We go a bit harder than that to ensure proper ring seat, but this is still a good guide.....and is written by the engineers!! Not marketing.
Great advice from both mjw930 and LT1xL82. Engines built specifically for racing (Drag racing) are completely different animals, plus you don't have the convenience to put break-in miles on those. But for any new car you plan on driving, nice and easy for the first 500 miles and be reasonable up to 1500 miles. That's how I'm planning on breaking mine in....
Guys, how many have read the break-in instructions in the owners manual and compared it to the image posted above by Tuner Boost?
After doing so, can you please point out to me where the significant differences are? For all practical purposes, the two sets of instructions seem very similar to me.
One says run it up to 4000 RPMs. The other says don't go over 4000 RPMs. These are compatible instructions.
One says the engine should be driven at varying loads and conditions. The other says avoid driving at any one constant speed. These are compatible instructions.
One says that up to 500 miles drive normally and do not run the engine to its maximum speed, and do not expose the engine to extended periods of high load. The other says for 1500 miles do not participate in track events. These are compatible instructions.
The only difference is one advises two or three WOT accelerations up to 4000 RPMs somewhere AFTER 30 miles and before 500 miles. The other says avoid full throttle starts for the first 500 miles. That is the ONLY significant difference. Can these be reconciled? I would venture to guess the "avoid full throttle starts" is for the transmission and differential, not the engine. So, somewhere after 30 miles and before 500, I will sprinkle in several WOT from about 2000 to 4000 RPMs, but in conditions where it does not jolt the transmission or differential (going down a hill, for example, or maybe from idle to 4000 do many WOT with the car in neutral).
So, the instructions, for all practical purposes, do not conflict.
Why is there all of this bank and forth banter of "No, don't do that! Do this!" when it is all pretty much saying the same things?
Last edited by rdslon01; 09-05-2014 at 12:35 AM.
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The significant difference is: The type of oil that is used for the break in process. Syn vs non syn.
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Someone please close this thread unless these "experts" step up to the plate and warranty your car if you follow their procedures.
Or at least put a disclaimer on this thread saying, "Following these procedures could possibly void your factory warranty."
Can you at least post your qualifications and credentials that qualify you to make such an outrageous post? Most of us sharing this accurate information ARE actual experts....factory train by GM and far beyond that. How about some intelligent dialog instead of acting like Putin or other communist leaders that silence any that dont agree with their propaganda. Just list your qualifications and certifications & experience in these matters that qualify you to make such crazy statements. That would at least give you some credibility behind what you state instead of looking like a clueless bully.
I think we have taken this thread about as far as it will go. Each individual will have to decide how they proceed with how they approach the issue. This thread is locked.
This video does a nice job of explaining new car break in. Enjoy!
NCM Lifetime MemberXXXXXXXXXXXXXXXXXXHaving trouble searching the forum? Try a Google search "[keyword] site:Hidden Content Vettenessa: 2015 Arctic White/Adrenaline Red 3LT Z51 M7 Coupe, Exposed Carbon Fiber Roof, GT seats, Performance data recorder, Carbon fiber instrument panel, Carbon flash badge package, Carbon flash spoiler and mirrors, Magnetic selective ride control, Performance exhaust, Electronic limited slip rear differential, Red painted brake calibers, Black machined aluminum wheels. Ordered on 10/23/2014. Status code 3000 on 12/18/2014. Status code 3300 on 01/15/15. TPW 01/26/15. Produced 01/15. Arrived 02/12/15.
Thanks Vigilance247! Good summary video and one we can send to "non-car-smart friends and family" just before they get a new vehicle. [I set this as a desktop icon for that purpose.]
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