The Melling M155 is a standard-volume, standard-pressure replacement oil pump for the small-block Chevy. It is built to Melling's OE-grade standards for consistent oil delivery and durability in street and performance use.
Specifications:
- Volume / Pressure: Standard Volume / Standard Pressure
- Manufactured pressure: approximately 70 psi relief (yellow spring)
- Pressure spring options: optional 58 psi spring available
- Gear/rotor: billet steel shark-tooth gears
- Housing: cast iron
- Engine / application: small-block Chevy
- Part number: M155
FAQ
What engine does the Melling M155 oil pump fit?
The M155 fits the small-block Chevy. Confirm your engine's oil pump style before ordering.
Is the M155 a standard or high-volume oil pump?
Melling classifies the M155 as standard volume / standard pressure.
Does this pump include a pickup screen or tube?
No. The M155 is supplied as an oil pump; the pickup screen or tube is sold separately. Maintain Melling's recommended 3/8 inch to 1/2 inch screen-to-pan clearance on installation.

