Last post on Nov 26, 2013 at 11:37 AM
You are in the Chevrolet Equinox
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Chevrolet Equinox, Auto Repair, Transmission, SUV
#111 of 1111 Re: Engine Start Up Noise [fast200]
Jun 15, 2011 (12:53 am)
Subject: Sharp Engine Rattle Noise At Start Up
Models: 2011 Buick Regal
2010-2011 Buick LaCrosse
2009-2010 Chevrolet Cobalt
2010-2011 Chevrolet Equinox
2009-2011 Chevrolet HHR
2009-2011 Chevrolet Malibu
2010-2011 GMC Terrain
2009-2010 Pontiac G5
2009-2010 Pontiac G6
2009-2010 Pontiac Solstice
2009-2010 Saturn Aura
2009-2010 Saturn Sky
2009-2010 Saturn Vue Equipped with the following engines
2009-2010 2.0L (RPO LNF)
2009-2011 2.2L (RPO LAP/LE8)
2009-2011 2.4L (RPO LE5/LE9/LAT/LAF)
This PI was superseded to update models, years. Please discard PIP4716.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
In rare instances a technician may comment they hear a short, sharp rattle noise from the front of the engine on start up.
If the noise is from the front accessory drive area, inspect the engine belt. We have seen concerns with engine belts causing a loud ticking type noise. If found, verify power steering pulley outer edge is aligned flush with shaft and repair as needed. If pulley alignment is correct replace the engine belt.
If the noise is still present and is very short and sharp in duration (2-5 seconds). This may be an issue with the cam phasers not parking properly. Once the noise is verified as the phasers, they must be replaced. If the cam phasers are replaced, remove the CMP actuator solenoids to inspect for debris. If debris is found clean and inspect for torn or loose screens and replace if necessary.
Note: If debris is found in the solenoids and phasers change the oil and filter before returning to service, in some instances it may be necessary to change the oil/filter multiple times with a test drivein between each. The filter and solenoids can be inspected afterwards to ensure no additional debris is present.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information. WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
#112 of 1111 Re: Engine Start Up Noise [fast200]
Jun 15, 2011 (6:25 am)
Also, so you HEAR a confirmed example, there are at least two videos on YouTube of the noise (one is from me). On YouTube, search "equinox noise start-up" and you should be able to find them.
#113 of 1111 Dealer Visit For Engine Start Up Noise
Jun 15, 2011 (8:57 am)
Made an appointment for the 2.5 engine start up noise, the talk of this town. I showed the Service Manager the Service Bulletin and he smiled shrugged his shoulders and said, "Wow never heard of that problem". That was that! I had my oil changed at 1350 miles and the car of course did not make the noise when started. It seems that the head in the sand attitude is the order of the day. I will monitor my vehicle and keep track of any further noises. At least I took the only measure I knew of to prevent any future issues, IF the oil change has any impact.
#114 of 1111 Re: Dealer Visit For Engine Start Up Noise [alois69]
Jun 15, 2011 (9:26 am)
From what I've read, oil changes DO make a difference, but it also depeds on how bad yours is so far. If your mpg is significantly reduced, and you hear the noise again, I'd take it in. And get it recorded if you can. Whatever happens, just make sure they make a note of it for warranty's sake.
#115 of 1111 Re: Engine Start Up Noise [islaguy]
Jun 15, 2011 (9:58 am)
Thanks islaguy. I noticed you said the old PIP code should be discarded. What is the new one?
#116 of 1111 Re: Engine Start Up Noise [fast200]
Jun 15, 2011 (10:27 am)
same number, with an 'A' on the end . PIP4716A
#117 of 1111 Re: Dealer Visit For Engine Start Up Noise [alois69]
Jun 15, 2011 (11:01 am)
Please keep me updated on your situation. I too hope the oil change works for you. Feel free to email me with any further questions comments or concerns.
GM Customer Service
#118 of 1111 Re: Engine Start Up Noise [fast200]
Jun 15, 2011 (11:56 am)
I recommend having the vehicle looked at by your local GM dealer. If they are unable to diagnose and resolve your concerns please feel free to email me.
GM Customer Service
#119 of 1111 Re: '11 Equinox stalling out [blackedoutnox]
Jun 15, 2011 (12:56 pm)
Please let me know how things go at the dealer. If the dealer is unable to address your concerns please let me know. You could also ask they involve technical assistance. I look forward to your update.
GM Customer Service
#120 of 1111 Re: 2011 Equinox problems [islaguy]
Jun 15, 2011 (1:57 pm)
I apologize for the problems you are experiencing with your vehicle. Please keep us posted on any updates.
Caron, GM Customer Service