jQuery not supported.



AFM Destruction

Just an idea why

AFM Destruction

Postby MIKE91B [OP] » Feb 11 2020, 8:35pm

So I recently was given some info on what may be the root cause of the cam and lifter failures. I wanted to see it first hand before I posted anything. Well today was the day. I have in my bay a 16 Camaro with an LT1 in it. Car had a P0300 in the ECM. Cylinder six was coming and going. When it was misfiring it had a slight tick. Nothing crazy but noticeable. All tests pointed towards lifter issues. So the head came off and what I found seems to confirm what I was told.[attachment=1]640F9A8C-CB6D-4C5F-88A4-81871B923A58.jpeg[/attachment][attachment=0]A4A8EE27-4D4C-4B1D-89F4-EE802C69C6E5.jpeg[/attachment]
Attachments
640F9A8C-CB6D-4C5F-88A4-81871B923A58.jpeg
A4A8EE27-4D4C-4B1D-89F4-EE802C69C6E5.jpeg
2015 Reg cab, 2wd, 5.3l, On3 single turbo, E85 conversion, 4.10 rear gear, and HP Tuner software.
Original Poster
User avatar
MIKE91B
Automotive Technician
Automotive Technician
4x4 Low Mode [L3]
4x4 Low Mode [L3]
Posts: 1777
Topics: 14
Joined: May 23 2015, 3:06am
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Location: OHIO
Year: 2015
Make/Model: Chevrolet Silverado
Group Membership:
Automotive Technicians
Registered users

Re: AFM Destruction

Postby MIKE91B [OP] » Feb 11 2020, 8:44pm

https://youtu.be/cIq2xxu79NA This is my source of the info. I appears that the lifter trays may be the root cause of the cam failures. The AFM lifter in this Camaro came out sideways. It could spin freely in the tray.
2015 Reg cab, 2wd, 5.3l, On3 single turbo, E85 conversion, 4.10 rear gear, and HP Tuner software.
Original Poster
User avatar
MIKE91B
Automotive Technician
Automotive Technician
4x4 Low Mode [L3]
4x4 Low Mode [L3]
Posts: 1777
Topics: 14
Joined: May 23 2015, 3:06am
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Location: OHIO
Year: 2015
Make/Model: Chevrolet Silverado
Group Membership:
Automotive Technicians
Registered users

Re: AFM Destruction

Postby jjs405 » Feb 11 2020, 9:05pm

Wow ... the way the lifter turned reminds me of the CP4 failures that some are experiencing ...
User avatar
jjs405
Combustion on 1 piston [L2]
Combustion on 1 piston [L2]
Posts: 181
Topics: 8
Images: 0
Joined: Mar 18 2015, 5:30pm
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Year: 2014
Make/Model: Chevrolet Silverado
Group Membership:
Registered users

Re: AFM Destruction

Postby MIKE91B [OP] » Feb 11 2020, 9:40pm

The tray I pulled out was an AFM cylinder. I can see cylinder 5s lifters and lobes. One of them is all jacked up. You can also see the lifter is not straight on the lobe. Now the question of how to prevent it from happening. I know they make linked lifters but why they don’t make some form of a steel guide is beyond me.
2015 Reg cab, 2wd, 5.3l, On3 single turbo, E85 conversion, 4.10 rear gear, and HP Tuner software.
Original Poster
User avatar
MIKE91B
Automotive Technician
Automotive Technician
4x4 Low Mode [L3]
4x4 Low Mode [L3]
Posts: 1777
Topics: 14
Joined: May 23 2015, 3:06am
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Location: OHIO
Year: 2015
Make/Model: Chevrolet Silverado
Group Membership:
Automotive Technicians
Registered users

Re: AFM Destruction

Postby nealinator » Feb 11 2020, 9:45pm

That lifter guide or tray whatever it is called looks like a cast piece on the video and very thin. Seems like more reinforcing would be good to prevent it from opening up.

Are all your motors coming apart? Bad time of year for you Mike!
Image
Nealinator's 5.3L 4x4 Z71 All Terrain188,629 miles
AMP Power Steps - Retrax Pro Cover - Terra Grappler G2 - Airaid MIT - Mobil 1
Borla Exhaust - Eonon GA7180 - Custom Catch Can - Bilstein 5100's - $ Cost $ - DiabLew Tune
User avatar
nealinator
Shifting into Sixth Gear! [L3]
Shifting into Sixth Gear! [L3]
Posts: 15648
Topics: 170
Images: 30
Joined: Mar 02 2015, 2:35pm
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Location: Katy, TX
Year: 2010
Make/Model: GMC Sierra
Variant: All Terrain
Extra Info: 1500 5.3L 4x4 Z71
Group Membership:
How-to Authors
TOTM Winner
Supporters
Registered users

Re: AFM Destruction

Postby MIKE91B [OP] » Feb 11 2020, 10:01pm

The Camaro is a customer car but my truck is good to go. I’ll conclude my truck topic later tonight. The lifter trays are a joke. Why they made them out of thin plastic is crazy. All LS and LT engines use similar trays. Someone needs to make a metal guide. I’m curious about the guts of the new 6.6l gas motor. It looks like a non AFM engine and passes the eye ball test for a direct drop in to a 1500. I honestly didn’t even know they made a 6.6 until about an hour ago.
2015 Reg cab, 2wd, 5.3l, On3 single turbo, E85 conversion, 4.10 rear gear, and HP Tuner software.
Original Poster
User avatar
MIKE91B
Automotive Technician
Automotive Technician
4x4 Low Mode [L3]
4x4 Low Mode [L3]
Posts: 1777
Topics: 14
Joined: May 23 2015, 3:06am
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Location: OHIO
Year: 2015
Make/Model: Chevrolet Silverado
Group Membership:
Automotive Technicians
Registered users

Re: AFM Destruction

Postby nealinator » Feb 11 2020, 10:05pm

It's plastic?!! That is nuts. Certainly should be swapped out anytime a lifter is replaced I would assume.
Image
Nealinator's 5.3L 4x4 Z71 All Terrain188,629 miles
AMP Power Steps - Retrax Pro Cover - Terra Grappler G2 - Airaid MIT - Mobil 1
Borla Exhaust - Eonon GA7180 - Custom Catch Can - Bilstein 5100's - $ Cost $ - DiabLew Tune
User avatar
nealinator
Shifting into Sixth Gear! [L3]
Shifting into Sixth Gear! [L3]
Posts: 15648
Topics: 170
Images: 30
Joined: Mar 02 2015, 2:35pm
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Location: Katy, TX
Year: 2010
Make/Model: GMC Sierra
Variant: All Terrain
Extra Info: 1500 5.3L 4x4 Z71
Group Membership:
How-to Authors
TOTM Winner
Supporters
Registered users

Re: AFM Destruction

Postby MIKE91B [OP] » Feb 11 2020, 10:15pm

They should be replaced anytime the head comes off. This is in my mind the biggest weak point in GM engines.
2015 Reg cab, 2wd, 5.3l, On3 single turbo, E85 conversion, 4.10 rear gear, and HP Tuner software.
Original Poster
User avatar
MIKE91B
Automotive Technician
Automotive Technician
4x4 Low Mode [L3]
4x4 Low Mode [L3]
Posts: 1777
Topics: 14
Joined: May 23 2015, 3:06am
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Location: OHIO
Year: 2015
Make/Model: Chevrolet Silverado
Group Membership:
Automotive Technicians
Registered users

Re: AFM Destruction

Postby sascwatch » Feb 11 2020, 10:24pm

I noticed the same thing last year when I had an AFM failure. The lifter tray on cylinder one had the little alignment nubs worn off allowing one lifter to turn and the other fell apart and broke the push rod. The lifter tray on cylinder 5 looked fine but I replaced both anyways.

Very minor damage occurred to one camshaft love but it has been running good since then. Over 15000 km since the repair.
sascwatch
Newbie
Newbie
Posts: 8
Topics: 1
Joined: Aug 08 2019, 3:03am
Years of membership: 1 year of membership
Location: ON
Year: 2010
Make/Model: GMC Sierra
Group Membership:
Registered users

Re: AFM Destruction

Postby MIKE91B [OP] » Feb 13 2020, 7:57pm

So curiosity got the best of me. I had some old dog bones out of a small block F**d. They fit. Now I’ll try and create a way to hold them down.
Attachments
AA029639-16D4-4CDB-9998-3C4A272F0FF4.jpeg
2015 Reg cab, 2wd, 5.3l, On3 single turbo, E85 conversion, 4.10 rear gear, and HP Tuner software.
Original Poster
User avatar
MIKE91B
Automotive Technician
Automotive Technician
4x4 Low Mode [L3]
4x4 Low Mode [L3]
Posts: 1777
Topics: 14
Joined: May 23 2015, 3:06am
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Location: OHIO
Year: 2015
Make/Model: Chevrolet Silverado
Group Membership:
Automotive Technicians
Registered users
Next

Return to EcoTec3 5.3L V8

 

  • Similar topics
    Replies
    Views
    Last post

Common search terms

looks make destruction last didn running year love both issues since same truck engine first today thing anything

It is currently Sep 29 2020, 8:38pm

  • Sponsor
Login  •  Register
Sitewide News Sitemaps & Feeds

Who is online

Users browsing this forum: No registered users and 7 guests