When GM decided to release its redesigned small-block V-8 for the 1997 model year, they went over-the-top with a new and improved design. This design was applauded by performance-minded engine builders everywhere. After being introduced into the LS family, it has become the most popular powerplant in GM's arsenal.
Brian Doyen from Hot Motorsports, in Santa Ana, California purchased a pre-owned, low mileage, 2000 GM 5.3L V-8 (325ci) truck engine that produced 285 hp and 325 lb-ft of torque from the factory. This Gen III engine features a deep skirted, six-bolt-main cast-iron block, with a pair of aluminum cathedral port cylinder heads. The heads were equipped with 2.00/1.55 valves in symmetrical intake and exhaust ports creating more efficient flow of the air/fuel mixture throughout the cylinder heads.
We snapped the photos while a Gen III 5.3L was enhanced by installing bolt-on LS performance components. The additions included: intake manifold, throttle-body, camshaft, lifters, pushrods, 1.7 roller rocker arms, double row roller timing chain and gears, shallow oil pan, remote oil filter adapter, high-volume oil pump, aluminum valve covers, headers, and 300-amp alternator.
Hot Motorsports engine specialist, Bob Ecker, disassembled the top end of the 5.3L Vortec V-8. The addition of these LS high-performance components will increase the horsepower and torque of this truck engine making it a real screamer. We hope to get some dyno numbers later, stay tuned.
With the engine dissassembled, a 13mm socket and 3/8-inch drive ratchet were used to tight
After sliding the Crane Cams double timing chain sprockets onto the crankshaft, the sprag
The Crane Camshaft (degree duration@.050 218-degrees, advertised duration 280-degrees, lob
A 13mm socket and 3/8-inch drive ratchet were used to secure the camshaft block support.
The Crane double chain was installed onto the double camshaft and crankshaft timing gears.
The Moroso high volume oil pump was installed onto the crankshafts sprag gear, and then se
A new factory timing chain cover was installed using a 13mm socket and 3/8-inch drive ratc
After installing the Federal Mogul and FelPro oil pan gasket...
...Bob aligned and secured the Moroso shallow oil pan with a 9/16-inch socket and 3/8-inch
The factory Vortec aluminum cylinder heads were removed from the block, then sent out to b
Before assembly, Bob polished each of the cathedral passages of the cylinder heads.
Both the intake and exhaust ports were also polished.
The new Crane conical valvesprings and intake and exhaust valves were staged and ready for
The intake and exhaust valves were given a three-angle cut before installing them into the
After pre-lubing and inserting the Crane roller lifters into the lifter bores, the pushrod
A valvespring compressor was used to compress the valvesprings while installing the valves
A torque wrench was used to guarantee the correct lb-ft of the new head bolts. Never reuse
Crane aluminum 1.7 roller rocker arms were installed to increase the valve opening, allowi
Your Questions Answered
Time Spent Working: 8 Hours
Degree Of Difficulty: Moderate
1/2-inch drive torque wrench, dremel rotary tool, sanding and polishing bits, 3/8-, 1/2-, 5/8-, 3/4-,inch 10mm, 13mm sockets, 3/8-drive ratchet and assorted wrenches.
Intake manifold 52064 $670.00
85mm throttle-body 60726 $230.00
Ignition coil covers 52140 $250.00
Cool Flex Radiator Hoses
Radiator hose kit FX3013 $312.12
Heater hose kit FX50FX513FX108 $232.17
Camshaft HR210/3121-2s-12-2A $468.00
Rockers & pushrods 144750-16 $771.84
Roller lifters 144530-16 $635.20
Double row roller timing chain & gears 144984-1 $254.80
Conical valvesprings 144832-16 $198.40
Aluminum radiator FHP20-3420C $280.00
Electric fan 16-inch FHP34116 $123.00
Transmission cooler DB30120 $152.25
Shallow oil pan with shallow sump 20140 $313.99
Aluminum valve covers 68352 $439.39
Remote oil filter mount 23764 $41.99
High-volume oil pump 22120 $145.00
Cryogenic 2-inch cooling system 080102 $393.33
Cryogenic 3-inch intake system 080110 $156.00
Cryogenic fuel rail system 080120 $150.00
Purge kit 080300 $133.33
Doug Thorley Headers
Jet coated headers TH-309-S-C $646.00
300-amp Polished Alternator PN $300.00
Mass airflow sensor 69101 $389.95
Throttle-body spacer 62100 $129.99
Complete gasket kit HS929PT and CS9284 $321.78
High-power ignition cables 04118101 $314.76
Silver spark plugs 150141020 $72.00
TOTAL COST $8,516.29
(Not including tax or labor)