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PostPosted: Fri May 06, 2016 2:01 am 
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Joined: Thu May 05, 2016 2:25 am
Posts: 99
Location: SW MI
Just posted up an into here viewtopic.php?f=2&t=1289

So I picked up my 2011 a couple days ago and am trying to diagnose the engine noise.
Here's a video if you all could take a look (listen) and tell me what you think, I'd really appreciate it.
Cold engine sounds perfect, just injectors ticking. After its warmed up theres a steady light knock sound at idle. Just a little bit of throttle and it quiets down and doesn't change with load like a rod bearing does with light on and off throttle in neutral.
I tried grounding out the coils one by one and the sound does not change so I'm thinking maybe a lifter but its heavier than just a "tick" sound.

https://www.youtube.com/watch?v=3V2sjYQg4YA

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2011 9C1 6.0
RCR "Little Lunati" 219/223 .625/.625 112+0
Kooks headers, hi flow cats, Dynomax Super Turbos
Flex fuel tune


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PostPosted: Fri May 06, 2016 3:24 am 
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Location: East Central Florida
Do you still have powertrain warranty on the car by chance? Methinks one of the AFM lifters is not a happy camper...

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PostPosted: Fri May 06, 2016 1:26 pm 
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Joined: Thu May 05, 2016 2:25 am
Posts: 99
Location: SW MI
140k miles- No warranty.
I'm probably going to pull the engine and take it apart to have a look. I 'm going to get a few more people to listen to it and do a compression test first- get as much info as possible before disassembly.
been reading the posts about DOD delete and cam upgrades. hopefully the lifter bosses in the block are OK. Maybe new cam and lifters, chain set, oil pump and crank bearings? Ill have to track all these parts down.. I've been out of the business for almost 10 years (good to be back!). I'll be posting the progress along the way with plenty of questions.
The goal is to have a car that's a badass daily driver.
Thanks

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2011 9C1 6.0
RCR "Little Lunati" 219/223 .625/.625 112+0
Kooks headers, hi flow cats, Dynomax Super Turbos
Flex fuel tune


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PostPosted: Fri May 06, 2016 3:54 pm 
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Joined: Wed Jan 21, 2015 3:29 am
Posts: 279
Location: Katy, Tx
I'm willing to bet if you do the DOD delete and get some lifters in there, you'll be fine.

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-Brandon
2012 9C1 L77 - 228/234, .604/.609 112 cam, JBA shorty headers, Solo high-flow cats, X-pipe, Cherry Bomb single-chamber mufflers (Frankenstein exhaust), Roto-Fab CAI, CTS-V torque converter, 3.45 Camaro diff, G8 red/black seats/steering wheel


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PostPosted: Fri May 06, 2016 8:57 pm 
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Location: Pittsburgh, PA
Since the cam turns at half speed of the crank, and I counted roughly 300 clicks per minute (which is 600 RPM crank speed), my guess is that's definitely a cam/lifter noise. I agree with everyone else, tear it apart, new non-AFM lifters, check or replace the cam, good to go. As long as the cam itself doesn't go flat and spread metal bits through the engine. I know it sounds like it's quite a bit of work, but the AFM lifters are problematic on these cars with high miles.

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Tom (AKA: Storm)
2011 Caprice 9C3: L77, 7K miles, first-owner, purchased July 2011.
1995 Caprice 9C1: LT1, 176K miles, summer car.
1995 Impala SS: LT1, 20K miles.
1995 Caprice Wagon: LT1, 61K miles.
1995 Caprice Wagon: LT1, 128K miles. Rust In Pieces
1994 Caprice 9C1: LT1, 101K miles, winter car.
1969 Chevy C30: 383ci stroker, 4L80E, rollback car hauler.
1972 Chrysler Newport: 400ci big block, 27K miles, 2-door hardtop.
1969 Dodge Charger: 383ci big block.


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PostPosted: Mon May 09, 2016 2:22 am 
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Joined: Thu May 05, 2016 2:25 am
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Location: SW MI
Got a vacation coming up- looks like I'll be spending it in the garage!
I think I'll go ahead and pull the engine and take it apart to see what it's made of.
Been reading up on the DOD delete threads- seems like the thing to do
Only thing is.. what to do for a cam, so many choices.
Looking at the Lunati 60516, 219/223, 112 LSA -OR- Comp Cams XR 269HR 216/220 114 LSA, any input is welcome. I'd rather someone tell my I'm a dumbass than end up with a dorked up engine! A "kit" with all the parts that will work together would be perfect.
I need to be able to drive this car daily and plan to keep the stock converter and exhaust- maybe delete the mufflers.
I Don't know any tuners, the Black Bear Performance tuning looks interesting.
Thanks for the replies.

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2011 9C1 6.0
RCR "Little Lunati" 219/223 .625/.625 112+0
Kooks headers, hi flow cats, Dynomax Super Turbos
Flex fuel tune


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PostPosted: Mon May 09, 2016 1:55 pm 
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Joined: Sat Feb 07, 2015 8:31 pm
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Location: Pearland, Texas
Black Bear said they could do it. They tuned our Tahoe, and it's great.

I'd call the vendors for those DOD delete kits. Most are knowledgeable of their cams and LS engines, and can make a decent recommendation based on your intended use.

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Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2010 Tahoe PPV (her car)
1995 DGGM Impala SS
1996 BBB Impala SS (11-second DD)
1985 Firebird - 310 LS1 C Prepared autocross car.
And some others
Do YOU have my SPID?


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PostPosted: Fri May 13, 2016 3:07 am 
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Joined: Thu May 05, 2016 2:25 am
Posts: 99
Location: SW MI
Got started pulling the engine out today, not as much progress as I hoped- spent a lot of time getting the shop organized. Should have it out and apart tomorrow. I haven't ordered parts yet, Hopefully I can do DOD delete, cam, lifters, springs, rings, bearings.
I Think I'm going with the "Little Lunati" cam. I been told there's 2 versions one for LS3 intake valves, the other for standard valves. 219/223 .625/.625 112+0 -or- 219/223 .612/.615 112+1.
I'm still trying to learn about these engines- The L77 has the rectangle port heads, so I'm thinking these are the LS3 heads and valves?


Attachments:
2016-05-12 13.16.46.jpg
2016-05-12 13.16.46.jpg [ 124.04 KiB | Viewed 3383 times ]

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2011 9C1 6.0
RCR "Little Lunati" 219/223 .625/.625 112+0
Kooks headers, hi flow cats, Dynomax Super Turbos
Flex fuel tune
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PostPosted: Fri May 13, 2016 1:06 pm 
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Joined: Wed Jan 21, 2015 3:29 am
Posts: 279
Location: Katy, Tx
Yeah, when cam shopping pretend it's an LS3. I think you're on the right track.

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-Brandon
2012 9C1 L77 - 228/234, .604/.609 112 cam, JBA shorty headers, Solo high-flow cats, X-pipe, Cherry Bomb single-chamber mufflers (Frankenstein exhaust), Roto-Fab CAI, CTS-V torque converter, 3.45 Camaro diff, G8 red/black seats/steering wheel


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PostPosted: Sun May 15, 2016 4:21 pm 
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Location: East Central Florida
Wow, you're a man of rapid action! Most people just start thinking about pulling an engine over 5 days, you've got parts on the bench. Not bad! Keep us posted on how things are going and which cam you end up using. My powertrain warranty is up in < 30 days, after that... hmmm.... :twisted:

Eric

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System Manager and your tourguide for the day. Caprice Alumni, former owner of a 2011 Caprice 9C3 with a Rotofab CAI and front radiator cover, 3.45 LSD Camaro rear diff, Chris Henry performance tune, G8 GT 18" Enkei rims w/Holden lions, custom SLP axle-back muffler set with tips, Holden WM Caprice factory spoiler, Holden SSV leather steering wheel and leather shift knob, Whelen Alpha-12Q airhorn amp. G8 GT rear seat swap, AVS Ventshades.


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