Having an issue with my build. Car wants to turn over, cranks but doesnt fire. Spark test was good and we are getting fuel. Im checking my timing and this is how it's set now. Before I button her back up, any suggestions on what else to look at or try? The cam position sensor was aligned with the hashmark as well intially.

thanks in advance

 

That looks right to me...

 

in case it doesnt turn again any suggestions on what else to check anyone?

 

what ur suppose to do is spin the crank pulley 2 revolutions and if timing is set right all the marks would line up perfectly again. but ya that looks like its on the money

 

No, they wont.

 

just finished this class in school. everything looks correct from what youve shown. is there a clearance issue with anything possibly ?

 

care to explain? i thought it was that way too

 

The crank sprocket has about 20 teeth, the chain has a bit more than that.

You spin the crank twice to ensure you have no clearance issues. If you keep going until the marks line up again youll be there for a very long time.

 

That is correct! It takes like 33 turns before the marks line up again!

I can't see the timing mark on the crank sprocket...the crank key should be at approximately the 1 O'Clock position with the colored link in that location. Is your crank key at the colored link position? If it is, it is not timed correctly. The timing mark on the crank sprocket should look similar to the timing marks on the chain sprockets

 

yeah, I did giggle at the 2 turns thing. I'll guarantee Witt is correct haha

Ive spun it over many a time previously to ensure everything is ok.

Any other suggestions of what could be wrong? I'll take a vid when i turn it over tomorrow. I'll put her back together after work and give it another whirl.

 

Did you look at your crank key position?

 

not sure exactly what you are asking. The crank pulley is on correctly if thats what ur asking?

? for the group

Does #4 need to be TDC when setting the cam position sensor?

 

It's just that in the picture you have of the crank sprocket the colored chain link looks correct but I can't see the crank key at the 1 O'Clock position. Is your crank key at the 1 O'Clock position at the same time the colored chain link is on the mark (like pictured - 5 O'Clock position) when both cam sprocket's colored links are on their marks?

Like this:

 

good luck with this I have done this once and it is a bitch #1 should be top dead center and the camsshould be a 10 and 2 which they look right and same with the crank, dumb ? but it happened to me did you plug the cam position sensor back in?

 

What he means by key is a square chunk missing, there is a timing mark on the crank sprocket that will line up with the colored link if this chunk is at the 1 o'clock position.



When i did it i never used this key, its the first time i have heard of it, i just used the timing mark. With the lighting and angle of the picture its hard to see if the mark is at the link

 

Number 4 needs to be at top dead center compression, not exhaust, when lining up and inserting the cam sensor. If you think that may be contributing to your problem, simply unplug it until you find the problem, it will start without it (it should start with it installed incorrectly but I've never tried it when its 180 degrees out of phase).

 

saved

 

Yeah, the cam position sensor is back. =)

lol, your welcome. You still have my number? Call if/when you put yours back together

Isnt that square key also what lines up to mount the crank pulley?

The red link is lined up with the white dot on the crank.

 

Yes, the square crank key is used to line up the pulley. Your picture almost gives me the impression that the white dot is also lined up with the key -- in your picture it is not clear where the crank key is -- it looks like there is a black square inside the white dot -- is that the crank key? If so, then the timing is not correct.

The drawing I provided in the previous posts is straight out of the GM Cobalt factory service manual.

 

umm like 20 min and 40 rev's lol trust me........ i know..... haha

but to the op yes your on the money, now one thing i wasent sure of is the balance shafts in relation to crank position which is why i spent 20 min turning it over by hand and lined up the accy drive chain and its marks first then the timing chain and its marks and my car fired first time and ran great... lots of people run into probs here....

 

i used neutral balanced shafts

 

click