Some GM 1.5 turbos not doing too well ?

[oil_film_movies]

Originally Posted By: Virtus_Probi
This is probably just semantics, but I'd argue that these engines are blowing themselves up rather than melting themselves...


True, the article cited earlier said "melted" when really it was cracked pistons from overpressure combustion spikes from LSPI, resulting in blowby and or a mess.
Funny how GM in their TSB specified the use of AC Delco Full Synthetic. Maybe that's a low-LSPI low-calcium Mobil Super Synthetic (or Mobil1) clone, revealing a strategy like you've already tried. Smart.

Maybe GM did all their durability testing using the AC Delco Full Syn formulation and is confident it won't produce too much LSPI.

At least the latest evolution of dexos1:2015 (in effect for a month now) has LSPI tests to pass. New dexos1:2015 oils are just making it to shelves one would assume.

 

[09_GXP]

Also depends on how far the failure has progressed. If you crack a piston and keep running it will start to torch/melt around the crack.

 

[BurrWinder]

Originally Posted By: oil_film_movies
Originally Posted By: Virtus_Probi
This is probably just semantics, but I'd argue that these engines are blowing themselves up rather than melting themselves...


True, the article cited earlier said "melted" when really it was cracked pistons from overpressure combustion spikes from LSPI, resulting in blowby and or a mess.
Funny how GM in their TSB specified the use of AC Delco Full Synthetic. Maybe that's a low-LSPI low-calcium Mobil Super Synthetic (or Mobil1) clone, revealing a strategy like you've already tried. Smart.

Maybe GM did all their durability testing using the AC Delco Full Syn formulation and is confident it won't produce too much LSPI.

At least the latest evolution of dexos1:2015 (in effect for a month now) has LSPI tests to pass. New dexos1:2015 oils are just making it to shelves one would assume.


I believe you are reading too much into this oil issue on these... I think it is rather more a "replace the oil that is in there and most likely contaminated" edict to prevent fuel dilution problems and that the new full synthetic ( which all of our bulk oil for this have been upgraded to in the last few months at the dealer level anyway ) is the oil specified for this replacement...

BurrWinder

 

[zzyzzx]

When I saw the thread title, I assumed that it was a plastic valve cover or plastic intake manifold that was melting.

 

[Ramblejam]

The SPI test is part of 2nd generation dexos1, which has a mandatory use date of 31 August 2017.

"Stochastic pre-ignition (SPI) test: Setting stricter limits than the comparable test incorporated with the proposed GF-6 specification (called the LSPI Test), the new dexos1 test ensures lubricants can mitigate SPI, a problem encountered in TGDI engines."

 

[A_Harman]

Originally Posted By: dishdude
What a poorly written article. I had to really search, and found a TSB for detonation. I guess technically that is a melting engine...but this hardly seems widespread.

GM Program #:
N162071350

Date Issued:
Feb 04, 2017

Program Title:

Stochastic Pre-Ignition (SPI) Causing Cracked Piston

Program Description:

Certain 2016 and 2017 model year Chevrolet Malibu vehicles equipped with a 1.5L LFV engine may have a pre-ignition condition that could cause piston damage. If this condition occurs, the vehicle may perform poorly and oil consumption could increase. In addition, a service engine light may illuminate indicating an engine misfire. If the condition is present, and the repair below is not completed before multiple pre-ignition events occur, a piston may be damaged and the engine may need to be repaired or replaced.

Repair Description:

Reprogram the Engine Control Module (ECM) and change the engine oil with ACDelco dexos 1 Full-Synthetic motor oil of the part number as indicated in the parts section. (In Canada use the exact Mobil 1 part number specified in the parts section). It is very important that only oil with the correct part number is used in this repair.


Will Smith in I, Robot:

"Somehow, 'I told you so' just doesn't quite cover it."

 

[A_Harman]

Originally Posted By: Nick1994
Originally Posted By: gregk24
This might explain the brand new Cruze I saw sitting on the side of the road smoking / burning oil like I have never seen before.
Cruze has the 1.4L


Same basic engine as the 1.5.

 

[A_Harman]

Originally Posted By: dblshock
right, these mfg's all have one thing in common, they're unable to lubricate the GDI/Turbo platforms.


This is not a lubrication problem per se.
It is a combustion problem initiated by a drop of oil in the combustion chamber at the wrong time.
It's risky to try to wring diesel BMEP's out of gasoline engines, and some are going to fail spectacularly.
Hopefully GM has a large enough line item in their budget to cover SPI warranties on downsized engines.

 

[sciphi]

Originally Posted By: A_Harman
Originally Posted By: Nick1994
Originally Posted By: gregk24
This might explain the brand new Cruze I saw sitting on the side of the road smoking / burning oil like I have never seen before.
Cruze has the 1.4L


Same basic engine as the 1.5.


Depends what generation Cruze. The 2011-2015 (and 2016 Limiteds) have the LUJ/LUV turbo 1.4. The 2016+ Cruzes the similar engine to the new Malibu.

So it's an engine calibration issue. Not shocking.

 

[SteveSRT8]

A TSB does NOT indicate that a problem is widespread, only that the mfgr is aware of a problem. This is likely oil related but easily eliminated.

This is internet amplification at its finest. Also a good reason to avoid being an early adopter.

 

[demarpaint]

Originally Posted By: SteveSRT8
A TSB does NOT indicate that a problem is widespread, only that the mfgr is aware of a problem. This is likely oil related but easily eliminated.

This is internet amplification at its finest. Also a good reason to avoid being an early adopter.


All good points, especially the point about being an early adopter. The more I read message boards and speak to people with problems with the first and second year of a new model, new engine or transmission design that statement continues to make sense.

 

[gregk24]

Originally Posted By: Nick1994
Originally Posted By: gregk24
This might explain the brand new Cruze I saw sitting on the side of the road smoking / burning oil like I have never seen before.
Cruze has the 1.4L


I know the previous generation had the 1.4T or 1.8. I thought the current generation had the 1.5T?

 

[4WD]

That's a turbo with seal out - there was a batch of them (forget the supplier) ...

 

[SteveSRT8]

Originally Posted By: demarpaint
Originally Posted By: SteveSRT8
A TSB does NOT indicate that a problem is widespread, only that the mfgr is aware of a problem. This is likely oil related but easily eliminated.

This is internet amplification at its finest. Also a good reason to avoid being an early adopter.


All good points, especially the point about being an early adopter. The more I read message boards and speak to people with problems with the first and second year of a new model, new engine or transmission design that statement continues to make sense.


Now more than ever. Due to ridiculous arbitrary standards being imposed we will all suffer the new tech as it must be introduced early and often.

 

[TiredTrucker]

Do these have a 91-93 octane recommendation with them? If not, wonder if that would help mitigate some of the problem. I really try to avoid premium as much as possible, but sometimes one just has to bite the bullet and use it.


Edit: Answered my own question. OM says use 87 for the 1.5. I think I would try premium if I had one of these.

 

[4WD]

We run mid grade on both TDI engines ...

 

[Nick1994]

Originally Posted By: gregk24
Originally Posted By: Nick1994
Originally Posted By: gregk24
This might explain the brand new Cruze I saw sitting on the side of the road smoking / burning oil like I have never seen before.
Cruze has the 1.4L


I know the previous generation had the 1.4T or 1.8. I thought the current generation had the 1.5T?
They still have a 1.4T. But someone said the 1.5 is basically the same as the 1.4 which I didn't know.

Which surprises me that the Malibu is said to be underpowered. With the 1.5. I can't understand that since the 1.4T seems fine in the Cruze, only 300 pounds heavier. That's like having a football player in the passenger seat of a Cruze. Would it be underpowered compared to an empty seat? I don't think so.

 

[gregk24]

Originally Posted By: Nick1994
Originally Posted By: gregk24
Originally Posted By: Nick1994
Originally Posted By: gregk24
This might explain the brand new Cruze I saw sitting on the side of the road smoking / burning oil like I have never seen before.
Cruze has the 1.4L


I know the previous generation had the 1.4T or 1.8. I thought the current generation had the 1.5T?
They still have a 1.4T. But someone said the 1.5 is basically the same as the 1.4 which I didn't know.

Which surprises me that the Malibu is said to be underpowered. With the 1.5. I can't understand that since the 1.4T seems fine in the Cruze, only 300 pounds heavier. That's like having a football player in the passenger seat of a Cruze. Would it be underpowered compared to an empty seat? I don't think so.


I doubt the 1.5T would be underpowered, unless GM does a terrible job programming / tuning them.

 

[gabriel9766]

I know the previous generation had the 1.4T or 1.8. I thought the current generation had the 1.5T? [/quote] They still have a 1.4T. But someone said the 1.5 is basically the same as the 1.4 which I didn't know.

Which surprises me that the Malibu is said to be underpowered. With the 1.5. I can't understand that since the 1.4T seems fine in the Cruze, only 300 pounds heavier. That's like having a football player in the passenger seat of a Cruze. Would it be underpowered compared to an empty seat? I don't think so. [/quote]

I doubt the 1.5T would be underpowered, unless GM does a terrible job programming / tuning them. [/quote]
I've j8ad a few malibu's as loaners w the 1.5 and it is way underpowered to me. The DI 2.5 in my Malibu had way more power to it. I like the looks of the new malibu's but not enough power.

 

[adriano]

Sorry for my bad english

We had the some cracked pistons problems here in europe too with the 1.6 sidi engine (LWC). This engine, u can find in europe on Opel cascada, astra and insignia.

A lot of 1.6l engine failure, On this failure cars gm put a new engine

GM recommended oil on the 1.6 sidi in 5w30 dexos 2, and 98 octane gasoline, 95 octane is not recommanded.

Even with dexos 2 and gasoline 98 octane (premium fuel) there were engines broken! So for me the problem comes from the engine design. It is ridiculous that in a modern engine is not recommanded to put gasoline 95 octane at risk that your engine breaks!. (98 octane fuel is more expensive than 95 octane)