Why Delete AFM ..... stock cam
12-20-2010, 01:29 PM
#23
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I havent read much about lifter "failures" per se but there are TSB's out there for "over active lifters" and the more important issue and main problem with the AFM crap "Oil consumption" problems. IIRC the replace/no replace threshold is one liter per thousand km's of use so about one quart for 800 miles. Thats insane IMO and enough to scare me away. There are also issues with piston rings becoming so caked in burnt oil deposits that they stick and the engine loses compression.
The actual lifter issue is the least of your worries with one of these AFM engines.
The actual lifter issue is the least of your worries with one of these AFM engines.
12-21-2010, 01:54 PM
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I havent read much about lifter "failures" per se but there are TSB's out there for "over active lifters" and the more important issue and main problem with the AFM crap "Oil consumption" problems. IIRC the replace/no replace threshold is one liter per thousand km's of use so about one quart for 800 miles. Thats insane IMO and enough to scare me away. There are also issues with piston rings becoming so caked in burnt oil deposits that they stick and the engine loses compression.
The actual lifter issue is the least of your worries with one of these AFM engines.
The actual lifter issue is the least of your worries with one of these AFM engines.
12-23-2010, 03:33 AM
#25
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Hell yea for a mass produced lifter like the LS7 they might as well give you the choice of of which ones you want. Esp if you have to deal with this problem to begin with. I wonder GM's cost on the AFM lifters compared to da LS7's???
Anyways good to know that my lifter tick that i was hearing is due to the AFM/VVT bullshit and now i finally have a solid reason to do a cam swap with some well needed valvetrane upgrades.
Anyone know of any GM service writers at a chicago land area GM dealer that would be able to see if they will relpace the AFM lifters with some LS7s under warranty???
Anyways good to know that my lifter tick that i was hearing is due to the AFM/VVT bullshit and now i finally have a solid reason to do a cam swap with some well needed valvetrane upgrades.
Anyone know of any GM service writers at a chicago land area GM dealer that would be able to see if they will relpace the AFM lifters with some LS7s under warranty???
12-23-2010, 10:32 AM
#27
Hell yea for a mass produced lifter like the LS7 they might as well give you the choice of of which ones you want. Esp if you have to deal with this problem to begin with. I wonder GM's cost on the AFM lifters compared to da LS7's???
Anyways good to know that my lifter tick that i was hearing is due to the AFM/VVT bullshit and now i finally have a solid reason to do a cam swap with some well needed valvetrane upgrades.
Anyone know of any GM service writers at a chicago land area GM dealer that would be able to see if they will relpace the AFM lifters with some LS7s under warranty???
Anyways good to know that my lifter tick that i was hearing is due to the AFM/VVT bullshit and now i finally have a solid reason to do a cam swap with some well needed valvetrane upgrades.
Anyone know of any GM service writers at a chicago land area GM dealer that would be able to see if they will relpace the AFM lifters with some LS7s under warranty???
12-23-2010, 07:39 PM
#28
OK guys if I decide to install a DOD kit on my new truck LC9 5.3 but plan to keep the stock cam and VVT ...........all I need to do is pull intake / valley cover and heads and swap out the lifters and valley cover .correct ? dont need to pull the front cover etcetc
Can you tell I never had a LS motor apart
BTW is the oil pump different on a DOD engine ???
Can you tell I never had a LS motor apart
BTW is the oil pump different on a DOD engine ???