GM Peformance Parts LS327 Crate Engine - K&N Air Filter

Ox used a 10mm socket with a long extension and ratchet to secure the intake manifold to the cylinder heads.
Ox used a 10mm socket with a long extension and ratchet to secure the intake manifold to t
After the alternator was installed, Ox relieved the tension on the belt tensioner and slipped the serpentine belt into place.
After the alternator was installed, Ox relieved the tension on the belt tensioner and slip
Underneath, Ox used a closed wrench to secure the bellhousing bolts.
An airgun was used, with a long extension and a 13mm deep socket, to secure the starter.
The coil/spark plug wires were installed before Ox secured the new exhaust gaskets and original exhaust manifolds.
The coil/spark plug wires were installed before Ox secured the new exhaust gaskets and ori
Due to rust and contaminates in the original engine water jackets and old aluminum radiator it was best to replace them with a new aluminum radiator and hoses.
Due to rust and contaminates in the original engine water jackets and old aluminum radiato
Once the new radiator was in place, Ox installed the original 5.3L fan onto the water pump shaft.
Once the new radiator was in place, Ox installed the original 5.3L fan onto the water pump
After the fan shroud was installed and secured, the K&N air intake tube and conical air filter were mounted to the air intake manifold and filter box.
After the fan shroud was installed and secured, the K&N air intake tube and conical air fi
After the new GMPP LS327 crate engine was assembled, Ox then dropped it between the framerails and secured the proper electrical, coolant, and fuel lines. New engine fluids were installed and checked. The engine was then fired and idled for a few minutes as the engine was checked for leaks. The rpm were then increased to 2,000 rpm for 20 minutes. It was then driven out on the street for some real miles.
After the new GMPP LS327 crate engine was assembled, Ox then dropped it between the frame
Driving the Avalanche for a few days, it was again secured on the Mustang Dyno and ready for a couple of power pulls. The dyno results were 287 hp @ 5,500 rpm and 329 lb-ft of torque @ 4,600 rpm. Perfect for a daily driven truck, 300 lb-ft of torque was available from 1,900 rpm. No doubt the new GMPP LS327 crate engine was a great improvement and will provide many miles of spirited driving.
Driving the Avalanche for a few days, it was again secured on the Mustang Dyno and ready

FROM THE DRIVER SEAT
As we drove the Avalanche from the office over to Traders in Santa Fe Springs, we could tell the engine was tired. After the new GMPP LS327/5.3L HO was lowered into the Avalanches engine bay, and everything was plumbed and wired, Ox inserted the key into the ignition, waited a couple seconds and turned the key. The new LS327 fired right up. Despite the engine being pre-run at GMPP before being shipped, Ox ran the engine at 2,000 rpm for about 20 minutes before we took it for a test drive. The new LS327 performed very well on its maiden voyage down the street and a short sprint on the freeway. When the ignition was turned off, the engine shut off tightly. A number of original engine parts were reused on the new GMPP LS327 crate engine and we no problems mating all the parts together.