Melling 10355 - Engine Oil Pump for GM Gen4 LS4 5.3L & L92 Vortec 6.2L

Description

Melling high-performance oil pumps provide dependable performance every time in every application under the toughest RPM conditions. The Melling 10355 high-performance oil pump is engineered as a high-volume performance upgrade for the M355, serving as standard displacement volume for 5.3L and 6.2L engines and delivering a 33% increase in volume over the 10295 pump. The 10355 features a CNC-machined, hardcoat anodized aluminum body paired with a phosphate-coated cast iron cover to maximize pump durability, minimize friction, and resist wear under demanding loads. Designed with an adjustable bypass circuit, the pressure relief valve incorporates a threaded screw-in plug rather than a press-fit cup plug, allowing easy installation of the supplied optional lower stock-pressure spring to fine-tune your oiling system. Complete with replacement oil pump and pickup screen mounting seals, every Melling high-performance oil pump is individually tested for flow and pressure under actual engine operating conditions before leaving the factory.

Features & Technical Highlights:

• High-Volume Flow Capacity: Displaces 33% more oil volume than the standard 10295 pump, serving as a high-volume performance upgrade for M355 applications and standard volume for 5.3L and 6.2L platforms requiring robust oil delivery.
• Hardcoat Anodized Aluminum Housing: Precision CNC-machined aluminum body provides superior wear protection against rotor friction and bore scoring.
• Phosphate-Coated Cast Iron Cover: Rigid cast iron end plate eliminates housing deflection under elevated pressure loads and promotes long service life.
• Adjustable Pressure Relief Valve: Features a secure, threaded screw-in relief valve plug in place of a standard press-in cup plug, supplied with an optional lower stock-pressure spring to customize system oil pressure.
• Factory 1-1/8" Screen Fitment: Engineered to bolt directly to stock 1-1/8" bolt-on oil pickup tubes.
• Complete Sealing Kit: Includes new replacement oil pump and pickup screen mounting O-rings/seals for leak-free reassembly.
• 100% Factory Bench Tested: Individually flow- and pressure-tested under simulated operating conditions to guarantee consistent out-of-the-box performance.
• Application Compatibility: Fits wet-sump GM Gen III and Gen IV LS-based engines; cannot be used on factory dry-sump LS7 and LS9 engines.