Why isn't the Sonic seeing these problems?
My 2011 ltz has about 46,500, no difference in performance, no engine light, so I believe in in the clear as of now. To your understanding, what can cause the turbo to crack, or pivot pin to wear?Note the check light will go on with PO236 and PO237 when the crack widens. I would estimate in some cases just under 100K or just over it.It will throw a PO201 if the Pivott pin wear gets large enough. But with there Recall updated program it takes a lot more play !!!!!!!!!!!! Trust me guys i know when there up to something !!!!!!!!!!!!!
Would you suspect the same issue with the 2.0L TD ??:huh: Did you notice any suspicious symptoms associated with the cracking and pin wear?Just want to get this out there.I am seeing a lot of Turbos cracked at the waste gate flapper valve internal to the Turbo.A good way to see this is unbolt the Cat and look up into the Turbo.You will see a crack running right up the side of the flapper waste gate valve Turbo casting.Tuned or untuned does not make a differance.I am also seeing large amounts of pivott pin wear on the arm pin that controls that valve.I would be willing to bet most of them over 50K are cracked.I just did the Turbo on my with 49K on it.I believe GMs PCM recall reprograming of the PCM was also to stop the PCM from setting a PO201 for Pivott pin wear also.I can see that in the updated program for emissions
I run the Sonic forum, and we haven't seen any outbreak of cracked turbos.I am sure they are.We sell a lot more Cruze than Sonic.Same engine same Turbo.Garrett unit made in Bulgaria. We have done 5 this month including mine.Also note there was no problem showing with my car engine check light.I new darn well it would be cracked and sure enough it was.And Thank you GM for my free Turbo just before my power train Warranty ran out. Cracked is cracked and there is no way out of it for them.There certainly not going to tell me thats a normal condition. I only posted this so fellow board members know and can inspect there's while there on warranty
It's not usually an issue. Probably 90% crack there (you'll see the same with other turbos), BUT most aren't cracked enough to not be able to build the amount of boost requested by the ECU.I run the Sonic forum, and we haven't seen any outbreak of cracked turbos.
Yes, we've had a couple pivot pins, but I mean a couple, not 5 in a month. Why is the Cruze breaking turbos at a much higher rate per vehicle than Sonics?It's not usually an issue. Probably 90% crack there (you'll see the same with other turbos), BUT most aren't cracked enough to not be able to build the amount of boost requested by the ECU.
The pivot pin is probably what wears out and ultimately requires replacement. The 1.4T is constantly fluttering on/off boost as it tries to fight off knock.
Is there another way to see this without taking things apart? Perhaps with a cheap boresope?A good way to see this is unbolt the Cat and look up into the Turbo.
Underboost code and a really slow Cruze.What happens if it goes to complete failure? Drivability problem, or internal engine damage?
More like 50 to 1 .Just a guess, but my guess is there are 10 Cruzes on the road for every one Sonic.