Which Lifter I need????
Thread Starter
Teching In
Joined: Dec 2018
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Which Lifter I need???? Hello,
here in germany nobody knows anything about LS engines.
Do anyone know the difference betwee the acdelco HL124 and HL128 Lifters?
And how I finde out by only the block number 12567392, which i need?
Thanks a lot for anything
here in germany nobody knows anything about LS engines.
Do anyone know the difference betwee the acdelco HL124 and HL128 Lifters?
And how I finde out by only the block number 12567392, which i need?
Thanks a lot for anything
TECH Senior Member
Joined: Jun 2016
Posts: 22,308
Likes: 3,625
From: Central Cal.
Tell us more. A LOT more. What did the engine come out of? Where are the knock sensors and cam sensor? What color is the crank sensor plug? Answering these questions will enable us to help you.
TECH Junkie
Joined: Nov 2013
Posts: 3,913
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From: White Bear, Mn
That's a 5.3L and the HL124 lifters will work
Thread Starter
Teching In
Joined: Dec 2018
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No Knocksensor at the timing cover. LS3 block number 12567392 should be a 5.3.
24x relucter Wheel on the crankshaft.
I don`t understand the differences between the two lifters. Melling produce only one sort of lifter for replacement. So why do acdelco produce two different lifters?
24x relucter Wheel on the crankshaft.
I don`t understand the differences between the two lifters. Melling produce only one sort of lifter for replacement. So why do acdelco produce two different lifters?
TECH Senior Member
Joined: Jun 2016
Posts: 22,308
Likes: 3,625
From: Central Cal.
They might have made an improvement or some sort of change along the way. The common lifter used lately is referred to as the LS7 lifter.
If you have a 24x reluctor it is a Gen III 5.3, likely an LM7.
The knock sensors would be under the intake manifold on that. Gen IV engines moved them to the sides of the block.
Your cam sensor should be at the rear of the top of the block, close to the oil pressure sender.
It is a cast iron block, right?
If you have a 24x reluctor it is a Gen III 5.3, likely an LM7.
The knock sensors would be under the intake manifold on that. Gen IV engines moved them to the sides of the block.
Your cam sensor should be at the rear of the top of the block, close to the oil pressure sender.
It is a cast iron block, right?
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Thread Starter
Teching In
Joined: Dec 2018
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Yes that’s all corect. The knock sensors are in valleys under the intake mainafold. The camsensor on top at the back of the engine.
But the interesting thing ist all that info’s are useless to find the right lifter. I have a laser stamp on the left backside c71164469.
summit racing gave me same info but didn’t told me if this is to combinat with this number.
You will need to research the engine you are using to determine the correct one.
HL124 is for Engine Designation: -, Engine VIN: 3. HYD, ROLLER, NON-ACTIVE FUEL MANAGEMENT LIFTER
HL128 is for Engine Designation: LS4, Engine VIN: C. NON-ACTIVE FUEL MANAGEMENT LIFTER
so I don’t what engine designation mean?
But the interesting thing ist all that info’s are useless to find the right lifter. I have a laser stamp on the left backside c71164469.
summit racing gave me same info but didn’t told me if this is to combinat with this number.
You will need to research the engine you are using to determine the correct one.
HL124 is for Engine Designation: -, Engine VIN: 3. HYD, ROLLER, NON-ACTIVE FUEL MANAGEMENT LIFTER
HL128 is for Engine Designation: LS4, Engine VIN: C. NON-ACTIVE FUEL MANAGEMENT LIFTER
so I don’t what engine designation mean?
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TECH Fanatic
Joined: Jan 2018
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From: Dade City, Fl.
The Ls4 designation was used for 5.3l engines built for and installed into front wheel drive cars. If I remember correctly there is something different about the block casting. It is an aluminum casting.
TECH Fanatic
Joined: Jan 2018
Posts: 1,251
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From: Dade City, Fl.
If you do indeed have a Gen III 5.3l block... either HL124 or HL128 will work. Purchase which ever you can get for less $. Either will work and the engine will run the same with either installed,no difference.
The number etched into the block is just an identifier number like a serial number. No use for you really.
The number etched into the block is just an identifier number like a serial number. No use for you really.