VVT issue

Paul Owner Strongsville, Ohio Posted   Latest   Edited  
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Driveability
2008 Pontiac G6 SE 2.4L (B) 4-spd (4T45-E) — 1G2ZG57B184295495
Engine Quit Running

Any ideas what symptoms would be present if phasers are installed wrong, int on exh, exh on intake, including solenoids installed in wrong position, GM has different part numbers for int and exh phasers and int and ex solenoids, phaser solenoids are PWM by PCM.

This question came up from a colleague of mine and I was having trouble finding facts to answer. Vin 1G2ZG57B… No information available on DTC codes, if any, after engine started. Engine reportedly ran and then quit after 20 minutes or so.

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Sean Technician
Cincinnati, Ohio
Sean Default
 

Having had that happen to me, mine was a gm 3rd design(I believe), 3.6l. It had different intake and exhaust, the first design or second had same all 4 dealership sent me all 4 same, theyall had intake and exhaust written on them so I lined up intake with timing mark etc. The only thing noticeable was immediately setting timing codes obviously thinking I set timing wrong since I scoped and saw…

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Paul Owner
Strongsville, Ohio
Paul Default
 

Thank you

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Jason Technician
Madison, Wisconsin
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Both cam phasers are the same. they are interchangeable, the solenoids are not as far as I know. the grey solenoid is intake and black solenoid is exhaust. this is pertaining to the 2.4l G6.

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Paul Owner
Strongsville, Ohio
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Thank you, any idea what is different internally?

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Jürgen Owner
San Cristóbal de las Casas, Mexico
Jürgen Default
   

Rule of thumb is intake cams will advance valve timing when VVT is activated while ex cams will retard. (of course there there are exceptions...) So if the actuators were physically able to be installed inversely they then would work the other way around. The control module would see the desired positions being different from the actualones and flag codes,could enter imp mode etc.

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Muritala Mechanic
Kosofe, Nigeria
Muritala Default
   

.........interchanging the can phaser may result to no start, mostly those one with the signal plate design. And it will retard the timing because the signal that been send through the phaser to the sensor electronically would correlated. Perhaps check all data.......... Thanks.

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Matthew Mobile Technician
Bartlett, Illinois
Matthew Default
 

I just diagnosed one with a similar issue a couple weeks ago. Some engines have the same P/N for both actuators/phasers... some engines it is a different part number. I cannot answer your question 100%, because the one I did had two intake actuators, not the two swapped. The one I did had a P0017. I went in-cylinder and saw that EVO was almost at BDC, the exhaust cam was stuck retarded.

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