Join Date: May 2014
Location: Edmonton, Canada
Last fall I put a 2007 2.4 cobalt engine into my 09 HHR. It was quite easy to do. I then used HP tuners to load up a 2.4 tune & I then programmed the 09 ECM with it.
Your problem is that the 08 doesn't have the wiring for the VVT actuators. You will want to find the engine harness off a 2.4 or 2.2 09+ which will have all of the required wiring, or you'll have to wire it up by hand. You will also need hp tuners to update the ECM with a tune that will run. send me an email (joelrsmith at gmail), I have a tune file that should work.
Last edited by jrsmith; 03-25-2019 at 10:29 PM.