So i am putting an 07 le5 into my base cobalt that came with an 07 l61. Here is what i need to know.

1. The cams between the motors seem to have the same specs, 30mm base circle and 36mm lobe height, but the casting numbers are different. Is the only difference the orientation in which the cam gear bolts to the cam?

2. I know a lot of you guys have done engine builds, is it safe to re use the cam sprocket bolts? On alldata it says to get new bolts but zzp didnt have any when I went there today. Should i get new ones?

3. Is there any aftermarket bolt for the harmonic balancer? Or do i need to go to the dealer and get one that i can only use once?

Here is what i am thinking for the cams. I could just put my l61 cams in with the l61 cam gears or maybe even keep the vvt actuator gears and just replace the cams. PLEASE please please if you have any insight I need to put the motor in the car ASAP. All im really looking for is that the cam sensor reluctor be clocked correctly so the car will run. I really hope mr.b or Jeff can chime in.

 

Can bolts can be used as long as they don't stretch. You can feel it when your doing it. I've 're used them without issues. I wouldn't recommend using them more then twice though.

The crank bolt just buy new although when I did s timing set in my car I reused it and never had an issue.

 

Okay thank you. Any insight on cam differences?

 

are you putting the full le5 in or mix and matching heads and blocks?

 

I think those bolts are tty, meaning, torque to yield...and would be no good after being torqued.

 

I went to the dealer and got new bolts. Not worried about that anymore. And im using the le5 head.

 

Bump about to tear it down and look for myself

 

got something good for ya coming up

 

First column is l61 second column is le5

 

So it looks like the gears are only different by one tooth, BUT the reluctor is 30* more advanced on the l61 cam than the le5 cam. So the next question is will it run with the le5 cam reluctor clocking off? I know i could just leave the cam sensor off altogether but id like to keep it. Is there any way to change this value in hptuners?


DUDE THANKS!!!

 

If i were you I'd add the three extra sensors/solenoids it has into your ecu. we actually have vvt tables we can use

 

I will add them eventually but i want the ecu to be able to understand the cam signal which i think means reclocking the reluctor unless someone knows if it can be compensated for in hpt?

 

Well if nobody knows i guess its my job to figure it out.

 

Heres a picture of the cams in the same orientation.

 

Do you have hpt yourself or is it gonna be a remote tune?

 

I do have hptuners, i will be looking at it later to see. I have to borrow my buddies laptop.

 

the pontiac g6 used the e37 ecu with the vvt 2.4 and the part number between the pontiac cam and the cobalt/hhr cam is the same. but the cobalt/hhr use the e67 ecu. So why is the reluctor clocked differently??

 

Both the E37, and E67 can be used for this.It will require a repin and a new cal. You do not reclock the crank sender. Steve

 

yeah ive been doing some research on it. The motor is in the car and runs now. The only other time ive seen this done the guy said he used a stock e67 file, will an e67 file flash directly onto my e37 ecu?

 

No. But why do you want to go thru all of this. Both the E67 and the E37 will do all the same sensors and solenoids as is. Play with the cal and be done with it. Steve

 

My car didnt come with vvt so the os version is different. The cam clocking is 30* off and im thinking that is in the firmware. Correct me if im wrong.

 

Alright so i flashed an 08 e37 le5 file onto my car but it seems like in 08 they used a clutch pedal position sensor ehich my car does not have, it just has the on/off switch. Is there anyway to bypass the clutch position sensor so that the car will start?

 

check to see what remote start systems do for that

 

good idea thank you

 

I found that there is a one pin difference for the starter control wire so i jumpered it but it still wont start. Ive also been trying to trick the ecu with a potentiometer to simulate a clutch position sensor signal because the scantool is reading that the clutch is released.