Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
I have seen both marks on both cam wheels.
Like this: https://www.google.com.au/search?q=2.2+ecotec+timing+chain+marks&prmd=ivsn&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjJ1t_t37_QAhVIopQKHVbFDLkQ_AUIBygB&biw=1024&bih=768#imgrc=bivcHwdENQ-BfM%3A
I will see what GM SI says for you.
Is the engine running like that?
Sounds like the camshafts are swapped over to me, hence why the marks are wrong.
Engine will run but cam sensor lug is in wrong place.
Ah yes, I forgot about that.
Are you setting the timing where it should be, or where you think it should be?
In other words, TDC 1, inlet and exhaust closed, TDC 4, inlet and exhaust on overlap.
And then the marks are wrong?
How about No. 1 on overlap, and No 4 on compression, valves closed.
It is the only thing it can be now, since the engine runs at the moment.
And yes, they are a bad design in many aspects.
I would say it must be out by one tooth.
The engine must be on overlap No. 1, not compression as one might think.
I would have put all of the correct marks would they should be, the 3 links of the chain lined up, and then the timing would be correct.
I would say timing cover off now to retime the cams.
Do you need any further help?
I hope my advice has been of assistance to you.
If you think about it, the short block has 1 and 4 both at TDC.
It does not matter which way they would be timed whether to 1 or 4.
The PCM knows which cylinder is on compression from the cam signal.
You originally mentioned you thought the wheels were swapped.
I will check on GM SI again for you.