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Block Specs, Swap Sources & Construct Information - Pak Auto Services
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Block Specs, Swap Sources & Construct Information

Block Specs, Swap Sources & Construct Information

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Engine Guides

Posted by
on March 21, 2022 at 10:22 am

Ford purists look away: This 5.3L LS crate engine now resides below the hood of a Fox Physique Mustang. Be taught extra about this Blue Oval/BowTie mashup right here. (Picture/Summit Racing)

If you happen to’re fascinated about an LS engine swap, LS engine construct, or LS engine improve, the primary place you’ll seemingly begin wanting is on the LS motor’s displacement. And that’s why we’re penning this sequence of tech posts. It’ll break down every of the LS engine’s hottest displacements.

Be taught extra about every LS engine displacement:
* 5.7L LS Engine Information: Block Specs, Swap Sources & Construct Information
* 6.0L LS Engine Information: Block Specs, Swap Sources & Construct Information

(We’ll add extra displacement articles quickly!)

This useful LS useful resource web page is an efficient one to bookmark in case you’re contemplating an LS crate engine for a swap, or on the lookout for a 5.3L LS brief block to make use of a foundation for a excessive horsepower construct.

You may additionally need to take a look at our Definitive Information to LS Engine Specs and LS Engine Upgrades.

The 5.3L LS Engine Household

The 5.3L LS, or Vortec 5300, is primarily a truck/SUV engine that spanned each the Gen. III and Gen. IV variations of the GM LS lifespan. It’s primarily a longer-stroke model of the 4.8L LS and powered automobiles such because the Silverado, Sierra, Yukon, and Escalade. The engine is made with each forged iron blocks (LM7) and aluminum variations (LM4 and L33). The later Gen. IV variations incorporate newer expertise such GM’s Lively Gas Administration and may be present in passenger vehicles (LS4) just like the Impala and Monte Carlo.

The 5.3L household is without doubt one of the extra standard swap choices. It was the most-produced engine from the Gen. III, IV, and V eras, and there are many these engines mendacity round in forged iron and aluminum kind. GM 5.3L LS engines can had at an affordable and could be made to provide excellent energy with the number of aftermarket upgrades accessible.

Your hunt for the fitting 5.3L engine begins with this spec chart:

5.3L LS Engine Spec Information

Years Liter Code Automobile Cam Bolts Reluctor VVT AFM Flex Gas VIN
(eighth Digit)
Block Head
2003-05 5.3 LM4 SUV 3 24x No No No P Alum. Cathedral
1999-07 5.3 LM7 Truck/SUV 3 24x No No No T Iron Cathedral
2002-07 5.3 L59 Truck/SUV 3 24x No No Sure Z Iron Cathedral
2005-07 5.3 L33 Truck 3 24x No No No B Alum. Cathedral
2007-09 5.3 LY5 Truck/SUV 1 58x/4x No Sure No J Iron Cathedral
2007-2011 5.3 LC9 Truck/SUV 1 58x/4x 2010+ Sure Sure 3 Alum. Cathedral
2005-06 5.3 LH6 SUV 3 24x/1x No Sure No M Alum. Cathedral
2007-09 5.3 LH6 SUV 1 58x/4x No Sure No M Alum. Cathedral
2008-09 5.3 LH8 Truck/SUV 1 58x/4x No No No L Alum. Cathedral
2010-12 5.3 LH9 Truck 1 58x/4x Sure No Sure P Alum. Cathedral
2010-14 5.3 LMF Van 1 58x/4x Sure No Sure 4 Iron Cathedral
2007-2014 5.3 LMG Truck/SUV 1 58x/4x 2010+ Sure Sure O Iron Cathedral
2005-06 5.3 LS4 FWD Automotive 3 58x/4x No Sure No C Alum. Cathedral
2007-09 5.3 LS4 FWD Automotive 1 58x/4x No Sure No C Alum. Cathedral

[Image: 2006 Chevrolet Impala 5.3 L LS4 V8 engine | GNU License]

On the lookout for an 5.3L LS Engine?

Listed here are two LS Engine Spotter’s Guides that can assist:

LS Engine Swap Components Information

Our buddies over at Summit Racing developed a useful useful resource that’ll provide you with an thought of among the components you’ll want to finish your LS engine swap—together with particular LS swap necessities for actual automobile fashions. You possibly can test it out right here:

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