Noisy AFM lifters? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Reply
 
 
 
Thread Tools Search this Thread
Old 06-12-2014, 02:44 PM   #1
Junior Member
Thread Starter
 
Join Date: Jun 2014
Posts: 2
Thanks: 0
Thanked 0 Times in 0 Posts
BoKnows is on a distinguished road
Default Noisy AFM lifters?

I have read up on the tsb #10-06-01-007B, and am wanting to know how many people are having this issue... The basic problem listed is engine noise on cold starts mostly, caused by the special lifters used in the Active Fuel Management getting clogged up. That eventually leads to lifter failure (I think you have to pull the heads to replace them) I work in research and development for a lubrication company, and am just trying to get more info on how prevalent the problem is.
BoKnows is offline   Reply With Quote
Old 06-12-2014, 05:18 PM   #2
Senior Member
True Car Nut
 
Soft Ride's Avatar
 
Join Date: Jan 2012
Location: BC Canada
Posts: 3,590
Thanked 340 Times in 302 Posts
Soft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud ofSoft Ride has much to be proud of
Default

Many may not be familiar with this GM active fuel management lifter problem.
So to assist this thread, I would like to add some prevalent info..
If you google the above Tsb # you will find a pdf with full description.
The effected vehicles are: 2007 Buick Rainier, 2009 Buick LaCrosse Super, Allure Super (Canada Only)
2007 Cadillac Escalade Built Prior to April 1, 2006 with 6.2L Engine RPO L92 (These engines were built with AFM Hardware but the AFM system was disabled)
2010-2011 Cadillac Escalade, 2007 Chevrolet Monte Carlo,2007-2009, Chevrolet Impala
2007-2011 Chevrolet Avalanche, Silverado, Suburban, Tahoe, TrailBlazer
2010-2011 Chevrolet Camaro SS, 2007-2011 GMC Envoy, Sierra, Yukon
2007-2008 Pontiac Grand Prix
2008-2009 Pontiac G8, 2007-2009 Saab 9-7X
I do not see any mention in the tsb about ticky lifters at cold start up.
The complaints of ticking lifters according to the tsb indicates that they show up after vehicle turned off after 2+ hours of quiet time and noisy after a restart and may last between 2 to 10 minutes after restart.
Of course ticking lifters can show up at anytime, and is a sign of mileage/wear, wrong oil viscosity, oil level low a quart below full, lower oil pressure, poor lubrication reaching heads, broken down friction modifiers from extended duration/ well used oil/filter, and Aerated oil etc...
The tsb does mentions Debris in the valve lifter, & a high valve lifter leak down rate.
My thought is if you dont want engine problems to start with, use good quality oil & filter, change it at 3500-4000 miles and keep the dipstick on the full line, by checking your oil level / condition weekly.

My 97 Park ave 3.8 v-6 at 104k miles without AFM, even after a fresh filter & quality synthetic oil changes had noticeable valve ticking going on. I tried numerous additives, and only one immediately made them quiet upon using this additive, and lasts the 3500 miles, dead quiet.
LubeGard bio engine treatment, in a blue bottle. 300ml
I would like to hear if owners with the AFM as above listed used this product and notice their engine become quiet again as well.
Soft Ride is offline   Reply With Quote
Old 06-12-2014, 09:30 PM   #3
Junior Member
Posts like a V-Tak
 
TieFighter's Avatar
 
Join Date: Jun 2014
Location: South Jersey
Posts: 27
Thanked 17 Times in 11 Posts
TieFighter will become famous soon enough
Default

ALL VORTEC engine are prone to COLD start up noise. (15sec. or so). That is an old bulletin. The head HAVE TO be pulled to do the lifters.
TieFighter is offline   Reply With Quote
Old 06-13-2014, 09:03 AM   #4
Senior Member
True Car Nut
 
jwfirebird's Avatar
 
Join Date: Dec 2009
Location: western,ny state
Posts: 9,616
Thanked 563 Times in 481 Posts
jwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond reputejwfirebird has a reputation beyond repute
Default

i cured mine without taking the lifters out. my 99 was neglected for its whole life, i got it nothing had been done, when i did the lim gaskets i cleaned the inch thick crap out of the valley, the manifolds, etc.. but it was running seafoam in the oil for a month or so a couple times then put regular valvoline in it, between that and the delphi mpfi i put on it, runs like new with 165k
jwfirebird is offline   Reply With Quote
The Following 2 Users Say Thank You to jwfirebird For This Useful Post:
Soft Ride (06-13-2014), WilliamE (06-13-2014)
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
4t65-e-mn7 transmissio 07 gp GXP 5.3 v8 with afm 1013jesse Pontiac 0 05-22-2015 03:03 PM
AFM Lifter problems BoKnows General GM Chat 1 06-03-2014 09:47 AM
2008 5.3L LV9 (AFM + Flex Fuel) swap for 2011 5..3L LC9 jkdavis32 Chevrolet 14 10-03-2013 08:11 AM
3900 V6 W/ Flex Fuel and AFM sawgunner General GM Chat 11 02-04-2011 12:41 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 07:40 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.