Mine are leaking. Not sure if they are causing other issues too or not. Has anyone else had to replace them? Any codes?

 

Actuators, being the physical phasers? I had a solenoid go out and it caused some issues. The car would stumble due to suddenly pulling and reapplying spark advance, due to the cam un-phasing and rephasing (and the ECU basing timing off of cam phasing).

Edit:

I also never got any codes thrown for this at any time. It would have made things MUCH easier to diagnose had there been. I picked up on it by data logging, and comparing for anything that happened in sync with the stumbling/spark timing oscillation. In my case, the exhaust cam was unphasing on its own (either quickly or over time, while driving at around 2K RPM and constant speed), and would then quickly rephase itself. The solenoid regulating the oil flow to the phaser on the exhaust cam was going out.

 

The two stuck right into the top of the valve cover. Felt like the car fell flat on it's face after changing gears, but then ramped quickly back up. I noticed the leak last night while looking around. I need to pull the VC off anyways, so if I'm doing it, I'll swap these out if they're not terribly expensive, but I'm curious if anyone else has had them go, and if any codes were being thrown. I have no codes being thrown, just the leaks.

 

Ok. Yeah, I had one of those solenoids go out. It was the exhaust one in my case, but I changed both of them out.

Description of issue I was having, story of troubleshooting, and conclusion and part numbers located in my thread on the topic:
https://www.cobaltss.net/forums/08-1...mbling-282523/

 

Hmm. I have different part numbers according to a diagram from CED. What did those parts run you? Here are the ones I found:

Intake camshaft position actuator solenoid: 12628347
Exhaust camshaft position actuator solenoid: 12628348

 

Yeah, those are the correct-old ones. The ones I listed were the new numbers.

I wanted them quickly, so I paid what the dealer was asking ($50 each) and just got them locally. GMPD says they'll let them go for $29.10 each though if you're willing to wait for them to ship.

 

yep they are kinda common in lnf's, seems more common in kapas though.

 

I'm pinging Tom on this one to make sure I get the right parts. Will reply if this makes things better.

 

If you feel inclined to replaced the CAM phasers themselves they are pretty expensive and would require retiming the engine, unless you are uber pro and can set the chain so it dont skip on the crank LOL

As far as the solenoids on the head, those are only like 30-40 bucks from GMPD and are also a revised P/N.

 

Well, just FYI: Both GMPD and 2 dealers didn't have those part numbers in their systems anymore, and both dealers also identified/verified those other ones were the current numbers for the LNF. My experiences with this aside, the fact that those parts are no longer listed with GMPD or dealers alone would tell you it had been superseded with something else.

On the other hand, I don't blame you at all for wanting to be sure. Also, to make sure we're clear, these are the solenoids, not the physical phasers themselves. I don't like the term actuator in this case because either part could be considered an actuator.

 

Okay, I ordered them from CED. Let's see if this also gets rid of the tip in knock (up to 2.9) that has suddenly cropped up. The part numbers were superceded, as Stamina mentioned. Thanks.

 

For posterity:

VALVE 12646784
VALVE 12646783

 

No problem man! Hope it helps fix the issue you've been having!

 

hope these fix it! i had a similar issue on my LE5, but i got a check engine light. It came on for the Intake side. i replaced both and the issue cleared right up.

 

My intake act. sol died at 50k miles, first it would flake out after 10 mins at op temp & the ECU would flatline both cams, no codes. You could see the intake cam wandering around like a sine wave at cruise before it died each time. Finally popped a P0011 iirc.

 

My Le5's intake solenoid also croaked at 68k

 

well mine made it over 150K before they died. but when they did...

 

Yeah, mine would idle a bit lumpy but would otherwise drive fine when cold. Like yours though, once it warmed up to operating temp is when the problem started happening each time.

 

Well, well. It appears the true culprit showed up after my order to CED. I popped P0497, which means the evap purge solenoid. I swapped it with my spare and all my tip in KR is gone.

Now I've got to get another spare. I'll still replace my camshaft actuators, since mine are leaking, and there is apparently a recall for our old ones on other GM vehicles, like the Equinox and Terrain. I don't know why we're left out when it's the very same part.

I would suggest replacing your camshaft actuators with the new part when you get the chance.

 

^^this. the solenoids wont park and set a code. Also there is a TSB for debris in the solenoids, you can see a fine screen with lots of debris, bad karma.10-4 on Kappa issues I am dealing with it as we speak.

 

The screen was immaculate on my dead one at 50k, it just **** the bed.

 

Had mine replaced about a month ago, code P0013 or P0011

 

^x2 in my case

Not a spec of anything on/in it.

 

These are exactly the parts I just had to have get replaced - GM dealership only charged ~ $50 for each, however the labor behind this was insanely expensive ($600+). 2008 T/c which just passed 90k miles - first things to really go on the car. What I don't understand is I've had them change the oil every time, always (presumably) with the right oil - how the hell does this happen?

 

Ouch, they charged you out the ass. You don't even have to remove the valve cover, just an 8mm bolt on each one.