Thank you for the input. I was kinda worried the crackle tune was a contributing factor to the cracking of the head. I guess I will find out when I run it and crack it again lolHey,
The head cracking issue could be a casting issue, but I would also consider that the turbine design plays a significant role as well. The car chokes. It cant get the exhaust gasses out fast enough. Bernoulis principle states an increase in speed of fluid reduces pressure and potential energy. Now opposite is true as well. If the pressure through the exit increases the speed decreases and potential energy(temp) goes up. So maybe the heat is backed up in the manifold and cylinder head temps are high causing the cast iron of the turbine housing to fail at the highest point of heat, ie the small exit of the wastegate opening. Maybe if it was made of incolnel 617 or 625 it would hold up lol. In cast iron heat distortion plays a huge role in its abillity to keep its properties after repeated heat cycles. If it gets hotter in some places than others, the crystaline structure will change causing failure. Aluminum and steel will do the samethings at differnt temps so I just think heat backed up in the turbine is causing many of the issues. I had to do all the work you are doing 1 month after owning my cruze. New head, turbo and gaskets. It is a pita like most things but you can do it.
I have never had it dyno ran. But I would like to think around 200-220. I have been able to keep but with plenty of stock or tuned Honda civics tho It’s been a good 9 months since my car was actually pushing 22psi but when it did it was a MONSTERNice writeup and photos, thank you!
Cruze owned for 2 years at the expense of 17 grand. If you sell it for 7.. thats 5 grand a year.. You got a pay to play!
Catless downpipe and mid pipe ran out the side. Crackle and Race tunes ported intake.. How many ponies was that making at 22? psi nearing 200 HP ?
I mean, you'd still lose if you try to sell it I guess, so maybe keeping it and praying that it keeps performing well is the play. Definitely got pretty unlucky with how much issues happened over small time frame, but it is what it is...A coolant line failing, the intake failing, and the 3rd water pump. I am around 5 thousand dollars into my Cruze after owning it for two years. And that doesn’t include the $100 oil changes and the gas and car washes. I’m total I am gonna guess I have spent roughly $7000 after owning this car for two years and am kinda discouraged from keeping it after these repairs
Yeah I ended up ordering one for 850 bucks says it’s gonna be delayed for a month. Sad but atleast it is a factory refurbished head and will be good to goBeen to the parts site, and there are other 1.4T options as well .. View attachment 302532
Yes yes yes, I was pushing very very much boost also got a few over boost codes that threw up to 30PSI so I have learned my mistakes and will calm the boost but I will never stop upgrading my Cruze. It is such a fun and lovable car. With every mod it gets more reliable and more fun I am gonna keep it under 250-300 because the trans will snap in half but I might have a guy for thatCracked cylinder heads now as well? Precisely why I would not dream of doing performance mods to this fragile POS car!
I can promise you unless I replace the entire housing the turbo is done. The props are bent and disfigured as well. They spin freely but not in good shape. I just ordered a new one off rock auto. Came with all the exhaust studs as well as a new oil fill tube and gaskets so it will be good to go once the head arrivesThe crack on the turbo is completely normal, and that turbo is still good.
Cracks in the head are unfortunately becoming more common, and GM has released a revised cylinder head design for these motors. P/N 55576728
You are correct, sorry. They have updated the 555 PN to this one as the latest revision.Been to the parts site, and there are other 1.4T options as well .. View attachment 302532
I don’t personally think the mods helped with reliability but overall I love my Cruze. With the miles it’s at around 147,000 some repair was expected but not the 2500 in parts expectedModded it, it broke, and now you're discouraged from keeping it. hmm 😯