Cryokid

Just found out that my 2014 C7 is going to be receiving a new engine. I assume that it will be a 2015 off the assembly line. Besides a change in the water pump, do any of you know if there have been any other changes to the engine for the 2015 model year. My car is a Z51.

mkr1966

What happened to yours?

Higgs Boson

you might want to check that assumption....most warranty replacements are remanufactured, especially when your car is not the current model year.

W88fixer

Interesting, not doubting you, always assumed they were brand new out of the crate. Don

Cryokid

I asked the Service Manager if it was a new engine or remanufactured? He indicated that he thought that it was new, but I will try and confirm that.

Higgs Boson

Let us know, I am interested..... I was a Fixed Operations Manager for a major auto manufacturer some time ago and dealership employees were always causing heat by using the term "new" when the engines, transmissions, rear ends, etc were all remans.

Spulbus2013

Key words...

LT1xL82

I wouldn't worry much about it if it is a remanufactured. What matters in my mind is WHO did the rebuild. GM or a GM appointed 3rd party? No problem. The assembly was "used" when it failed, so a remanufactured is fair game. Anyway, "seasoned" parts like engine blocks et al are often considered desirable!

(Ronderful Ricky's Re-do-m Remanufacturing Company? A whole 'nother story.)

3 Z06ZR1

Pretty new engine may not have many rebuilt one's yet. My guess is it will be new!

Higgs Boson

this is true and why i hope he lets us know.

Cryokid

OK, I was at the dealer today and saw my new crate engine. I repeat, new engine, not remanufactured. Apparently, since the engine is only one model year old, they don't have enough core engines to rebuild. New part number for my Z51 is 12657248 - $7,294.44

Translator

Great news! Good luck with the new one.

Higgs Boson

Minkster

Why did you need to replace your original engine?

Cryokid

I was getting significant valve train noise (lifter type noise) and was throwing knock codes. Engineering had the dealer replace all the lifters, but when reassembled, it was still making the noise.

So I pushed for a new engine because they wanted the dealership to tear the whole engine down. The dealership was very cooperative and very interested in having a satisfied customer. So far no complaints with the dealer or Chevy although I'm still not happy about having this problem in the first place.

Hoping to have my car back Wednesday this week.

Minkster

Thanks for the info. I wonder if this could be a problem with the DoD lifters that are controlled by the computer to put the motor in 4 cylinder mode...

Cryokid

Picked my car up last night and had a chance to drive it for 60+ miles. Looking at the work that was done by the dealership, I can't tell that the engine was replace.

So far, so good. The one thing that I noticed right away was that the oil pressure was higher 40 psig during normal engine speeds and obviously higher at slightly elevated rpm's (3,000 - 3500). My old engine never exceeded 40 psig and normally ran at 25 to 30 psig. I wouldn't be surprised if that was the root problem with my old engine.

So now I'm just going to take it easy for the next 500 miles and then get back to fully enjoying my car.

Minkster

Great news.

The increased oil pressure is probably due to the new engines lifters operating properly and holding pressure. If the old lifters were letting oil by, you would read lower oil pressure.