Mazworx SR20 Block Stg 1

The Mazworx SR20 Block Stage 1 package offers a professionally prepped Nissan SR20 engine block, tailored for DIY builders seeking a reliable upgrade from OEM specifications. Designed to support engines producing up to 400 horsepower, this stage 1 block ensures enhanced performance while maintaining strong durability and precision.

Comprehensive Block Preparation

• Hot Tank Cleaning: Thoroughly removes oil, grime, and contaminants to provide a clean foundation for machining.
• Sand Blast Block: Eliminates corrosion and debris from aging blocks, restoring a uniform satin aluminum finish for improved aesthetics.
• Surface Resurfacing: The block deck and front cover surfaces are precision resurfaced using advanced poly-crystalline diamond (PCD) tools to ensure flatness and optimal sealing.
• Oil Port Plug Removal and Replacement: All oil port plugs are removed to allow complete cleaning of oil galleries, then retapped for NPT plugs. The main oil galley is CNC-machined to accept custom o-ring threaded plugs, ensuring a reliable and reusable seal.
• Freeze Plug Upgrade: OEM freeze plugs are replaced with CNC-machined threaded plugs featuring o-rings for a durable and leak-free fit.
• Cylinder Honing with Torque Plate: The cylinders are honed with a torque plate simulating the cylinder head bolted on, resulting in true cylinder dimensions under operating conditions—a critical step especially for sleeved blocks.
• Oil Groove Machining: An oil groove is machined into the main journals (typically GTi-R and VE blocks) to accommodate 5-hole main bearings, enhancing oil delivery to main and rod bearings for improved lubrication.
• Front Main Oil Squirter Upgrade: The OEM timing chain oil squirter is replaced with a threaded, Mazworx-designed unit that prevents popping out and ensures consistent oil flow.

Included Parts

• Mazworx/ARP Main Studs
• Mazworx Front Oil Squirter
• Mazworx Threaded O-ring Plugs
• NPT Threaded Plugs
• New Oil Pump (OEM compatible for S13/S14/S15 or VE)
• Mazworx Threaded Freeze Plugs
• Billet Water Connector (-10an; S14 blocks use OEM connector)
• Billet Breather

Note: This service requires the customer to send in their core block for preparation.