Join Date: Mar 2019
Location: East Coast - Northern Shenandoah Valley in Va.
05 Cobalt 2.2 Valve Ping Noise when Cold
Hi Folks. I'm new to the Cobalt forum. I just acquired a 2005 Chevy Cobalt LS 2.2 with 144K miles. The previous owner did not care about the car and it was 2qts low on oil when I got it. I changed the oil/filter and put in fresh 5w30 synthetic. When the car sits for a while and I start it, there is what sounds like a valve ping on the LS (facing engine from front of car) of the valve cover. It goes away after a few minutes idling. I've read through many posts about a knocking noise from down under, but that doesn't seem to apply... yet.
I'm going to monitor it to see if it gets worse, but would like to stick an oil pressure gauge under the hood to monitor things.
Is there an easy access plug someplace other than under the intake manifold? I see what looks like a plug on the drivers side of the head... can I plug a gauge in there?
Also... is there an accelerator cable/linkage someplace under the hood so I can rev it while under the hood?
I don't know much about these engines yet.... I'll need to find a decent service manual.
Thank you for any replies.