The factory LS oil pump suffers from cavitation above 6,200 RPM, which results in a drop in oil flow of nearly 1 GPM by 7,000 RPM. This cavitation can also aerate the oil, which causes drops in oil pressure and can result in oil starvation. This is why we do not recommend shifting any higher than 6,200 RPM with a stock engine. Engines that run at RPM's above 6,200 should use an upgraded Melling pump to prevent these issues.
The Melling 10295 pump features a stiffer pressure relief spring, which increases the maximum system oil pressure by 10%. This higher maximum pressure can help negate drops in oil pressure caused by the addition of an oil cooler setup. The stiffer oil pressure relief spring can be swapped out for a factory specification spring, which is also included with the pump.
This oil pump is compatible with 4.8L and 6.0L Vortec iron block engines featuring Variable Valve Timing (VVT). This oil pump should not be used with engines that feature Active Fuel Management (AFM). Engines with AFM require a higher flow pump. See Melling part number 10355.
Features and Benefits
- Factory volumetric flow rate, around 6.8 GPM
- Includes stiffer bypass spring for a 10% maximum oil pressure increase over the factory LS oil pump, factory specification oil pressure spring also included
- Compatible with Vortec iron block VVT engines (4.8L & 6.0L)
- Cast aluminum housing, CNC-machined and hard anodized
- Iron cover, CNC-machined and phosphate coated
- Compatible with factory GM oil pickup tubes/screens
Applications
- GM GEN III & IV LS and Vortec engines without AFM/DOD, including:
- Gen III LS blocks LS1, LS6
- Gen IV LS blocks LS2, LS3
- Gen III Vortec 4800 LR4, LM7
- Gen III Vortec 5300 LM7, L59, LM4, L33
- Gen III Vortec 6000 LQ4, LQ9
- Gen IV Vortec 4800 LY2, L20
- Gen IV Vortec 5300 LH8, LH9
- Gen IV Vortec 6000 L98, L96, LY6, L9H
- Gen IV Vortec 6200 L92, L9H
