You are browsing camaro6 
05-01-2020, 09:36 AM
|
#1 |
   
Drives: 2018 ZL1 Camaro 6M Red Hot Join Date: Aug 2013
Location: Cary, NC
Posts: 1,139
|
Ignorant Engine question
I was just reading a thread over on the 6th General discussion area about an LT1 that grenaded.
Saw where folks were mentioning that the AFM lifters have been known to be an issue. So, I was wondering, do our LT-4 engines have these AFM lifters? If so, I may swap them out once my warranty is up in 11months. Be a good time for a cam swap at the same time... ;-)
__________________
People are a lot like slinky's: not very helpful most of the time, but they bring a smile to your face when pushed down the stairs...
|
|
|
|
05-01-2020, 09:39 AM
|
#2 |
|
Retired from Car mfrs....
Drives: 2LT RS/HR-V Join Date: May 2013
Location: /Fort Lauderdale
Posts: 10,044
|
So you read one post and you’re ready to consider all of them will do that?
Don’t believe it, it’s not a trend, except for the purists, the AFMsystem works fine. |
|
|
|
|
05-01-2020, 09:51 AM
|
#3 |
|
Drives: 2018 ZL1 Camaro 6M Red Hot Join Date: Aug 2013
Location: Cary, NC
Posts: 1,139
|
I have a manual trans. So, I don't have AFM regardless.
So, if I am going to do a cam once my warranty is up, why not replace the lifters as well if they have caused problems for others? Have you not heard the old adage about an ounce of prevention?
__________________
People are a lot like slinky's: not very helpful most of the time, but they bring a smile to your face when pushed down the stairs...
|
|
|
|
|
05-01-2020, 09:54 AM
|
#4 |
 
Drives: 2019 Chevy Camaro ZL1 M6 Join Date: Jul 2019
Location: Sea level
Posts: 1,276
|
If you are doing a new cam you should do new lifters regardless IMHO.
|
|
|
|
|
05-01-2020, 10:11 AM
|
#5 |
|
Drives: 2018 ZL1 Camaro 6M Red Hot Join Date: Aug 2013
Location: Cary, NC
Posts: 1,139
|
Yeah, was planning to anyway.
Still kind of curious as to whether or not the LT-4 has the AFM lifters. Hopefully, someone here will know Like the EDFHobbies Dude. He has done a ton of motor work on his.
__________________
People are a lot like slinky's: not very helpful most of the time, but they bring a smile to your face when pushed down the stairs...
|
|
|
|
|
05-01-2020, 10:17 AM
|
#6 |
|
Drives: 18 ZL1 1LE Join Date: Apr 2013
Location: Florida
Posts: 705
|
The LT4 does not have active fuel management
|
|
|
|
|
05-01-2020, 11:24 AM
|
#7 | |
 
Drives: 2023 SS 1LE Join Date: Mar 2020
Location: Virginia
Posts: 271
|
Quote:
Here's GM's cam spec sheet: LT4 Camshafts LT4 Cam Specs Part Number 12642245 Duration @ .050 in. (int./exh.) 189°/223° Valve Lift (int./exh.) 0.492 in./0.551 in. Lobe Separation Angle 120° Cam Gear Attachment 1-Bolt Cam Gear Poles 4X Active Fuel Management (AFM) Yes** Variable Valve Timing (VVT) Yes NOTE: **All versions used AFM with one exception — the Chevy Camaro ZL1 with manual transmission. |
|
|
|
|
|
05-01-2020, 11:25 AM
|
#8 |
      
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,869
|
Yeah we don’t have AFM in our LT4 6 speeds and am thankful.
__________________
ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.
|
|
|
|
|
05-01-2020, 12:53 PM
|
#9 |
 Drives: 2018 Camaro ZL1 Join Date: Feb 2020
Location: Scottsdale
Posts: 98
|
I'm confused. In other threads, some have said indicated that no ZL1s have AFM. I've never noticed it kicking on and off in my A10, so I assumed this was true. I also believe I've read that the parts are there, it's just that system is not activated. I've never cracked one open, so not sure about any of this, but would love to know for sure. Also wondering if having the VLOM is in place requires the use of AFM lifters on those 4 cylinders?
|
|
|
|
|
05-01-2020, 01:15 PM
|
#10 |
Drives: 2018 Camaro SS 1LE Join Date: Jul 2018
Location: Stuttgart, Germany
Posts: 902
|
The extra labor step for removing the AFM lifters is pulling the cylinder heads to access.
Even if your car is not equipped with an active AFM, the hard parts are still present likely to keep simplicity on the assembly line/etc, unfortunately.
__________________
|
|
|
|
|
05-01-2020, 02:21 PM
|
#11 |
Drives: 2017 A10 ZL1 Join Date: Jul 2011
Location: CO
Posts: 52
|
ZL1 dont have afm but the Z06 does, the ZL1 uses the same valley cover and lifters as the Z06
|
|
|
|
|
05-01-2020, 03:16 PM
|
#12 |
|
Drives: Chevy Camaro ZL1 Join Date: Apr 2020
Location: Florida
Posts: 95
|
My wife has a ‘17 SS with AFM. So far I’ve been unable to find the little green “V4” that she has on her DIS on mine. I’ve concluded that I don’t have it.
|
|
|
|
|
05-02-2020, 06:53 AM
|
#13 |
|
Drives: 19' ZL1 A10, w/pdr Join Date: Sep 2014
Location: S.W. ohio
Posts: 1,700
|
My 19' Zl/1 A10 does not have AFM.
__________________
BTR Stg II cam w/ 38% fuel lobe, ARH 2" headers into 3" w/Gesi cats, Kong X port, Weapon X triple ht exchangers, NW 103, Rotofab big gulp, DSX lowside, TCM tune, BMR Lockout, Mustang dyno 720 rwhp, 634 rwtq on 93 pump.
 |
|
|
|
|
05-02-2020, 08:34 AM
|
#14 |
 
Drives: 2019 ZL1 A10 Black Mosaic Join Date: Nov 2018
Location: Pensacola, FL
Posts: 157
|
My 2019 A10 ZL1 does not have AFM.
__________________
2019 Black Mosaic ZL1 A10
Kong Ported SC, 2.3 Grip Tec, Roto-Fab Big Gulp, NW103 TB, Mighty Mouse CC, ADM Expansion Tank, ARH 1 7/8 Headers, Catless 3" X-Pipe, Corsa Extreme, Eibach Springs, BMR Cradle Lockout, BMR Trailing/Control arms. |
|
|
|
|
|
|
|
|
Post Reply
|
|
|
