Lifters

Tech discussions on the L77 6.0L V8.
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VintageIron41
Posts: 162
Joined: Sun Nov 18, 2018 2:23 am

Lifters

Post by VintageIron41 »

Thank you for the answers already given, another question please. What lifters are recommended for an L77 with a Texas Speed LS3 cam? Intend to do the DOD/AFM delete, but thinking new lifters are a good idea along with the cam.

Thank you!
Navy Lifer
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Location: Canton GA

Re: Lifters

Post by Navy Lifer »

Don't go cheap....OEM is fine, use 12499225 for a set of 16 standard (non-AFM) lifters
https://www.gmpartsdirect.com/oem-parts ... s-12499225

You can shop around Amazon & ebay for this PN, probably find it for less.
https://www.ebay.com/p/GM-12499225-LS-C ... /657031067
https://www.amazon.com/HYLIFT-Hydraulic ... B01M8NSRGB

Other options include GM 88958689, a set of 16 racing lifters - of course, they cost more
https://www.gmpartsdirect.com/oem-parts ... g-88958689

I recently bought as set of Hylift Johnson A2281SE lifters that I plan to use for my AFM delete
http://jamsionline.com/chevy-gm-direct- ... on-2281se/

Hylift Johnson has a patented Direct Shot® Bearing Oil injection system as an option to all of our roller Lifters. Our system utilizes a proprietary oil band system that prevents debris from clogging up the oil supply hole. Extreme engine testing has shown that our system has improved durability by as much as 300%.

http://tldev.bluearray.net/wp-content/u ... 2013-A.pdf
VintageIron41
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Re: Lifters

Post by VintageIron41 »

Thanks Bill!

Dave
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tedwards0633
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Re: Lifters

Post by tedwards0633 »

When I got mine I called Texas Speed and they were very helpful. They mentioned they get a lot of calls for the PPV so very knowledgeable.
Navy Lifer
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Re: Lifters - TX Speed list

Post by Navy Lifer »

VintageIron41
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Joined: Sun Nov 18, 2018 2:23 am

Re: Lifters

Post by VintageIron41 »

Thanks again Bill!

Question, with the intent of swapping out the camshaft, on a motor with 20k miles, out of the car, would you do the lifters, or consider them low mileage enough to leave alone?
Too, what is the procedure, as in, order of doing, for disabling AFM, if you do swap in new lifters that are for AFM delete? Do you need to have AFM programmed out/Ranger OBDII plug, and prior to swapping out the lifters?

Again, thank you!

dave
lastcall190
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Location: North Jersey

Re: Lifters

Post by lastcall190 »

I'm not Bill but I'll give my $.02

With the motor on a stand, absolutely I would do the lifters. I can't tell from your initial post, but are you putting in the LS3 cam but looking to keep the stock lifters?

As for order, you can program AFM off prior to swapping the hard parts.

-J
2012 Caprice
2008 CVPI

Both gone but not forgotten...
Navy Lifer
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Re: Lifters

Post by Navy Lifer »

I'm hardly the expert as far as procedural steps to change from AFM to non-AFM. Still, here are my thoughts in regard to your question--hopefully others with additional experience will weigh-in.

Certainly it's possible to "turn off" AFM via the ECM or other means, but the hardware remains--for a performance upgrade, this is a bandaid approach as the AFM lifters are known to be a source of problems, in the long run.

If going to an LS3 (non-AFM) hardware setup, the 8 lifters, minimum, and a new valley cover plate will be necessary. The additional parts needed all come down to the level of disassembly necessary to remove the AFM components, and, assuming a cam change is part of the project, anything that might be appropriate to change at the same time.

Lifter replacement requires head removal, so there are new head gaskets, new head bolts (TTY--single use), and other ancillary items that go along with that process.

If a new cam is being installed, I would use 16 new lifters, as well as a new timing chain, minimum. The Katech C5-R chain is more expensive by a good bit, but it has a faultless reputation--I have no information to suggest the OE chain is problematic, but this can be one of those things that you might consider, budget allowing.

Choice of cam, if non-OEM, and choice of head gasket (thickness) or any head resurfacing, can easily create a requirement to use non-stock pushrods to ensure lifter pre-load is correct, and that becomes something that needs to be determined near the end of assembly--either have multiple length pushrods on hand, or be ready to wait for the correct length, once the requirement is known--this is quite important to successfully changing the combination, so it needs to be worked into the process.

AFM uses a higher-volume oil pump, and it may or may not be advisable to look at changing to a "standard" pump/high pressure, or some sort of blueprinted pump, available from many sources.

Some have chosen to plug the block ports that feed AFM, however, the proper cover/gasket blocks that oil flow, so it isn't 100% necessary.

Ultimately, programming will be appropriate for the new cam, depending on how much it differs from the L77 AFM camshaft, and that is the right time to make sure the ECM is updated to keep it from "looking" for AFM, so no Service Engine alarm is activated.
VintageIron41
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Re: Lifters

Post by VintageIron41 »

Thank you Lastcall and Navy Lifer!
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