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Take complete control of your engine’s oil pressure with this fully adjustable relief valve kit. A vital upgrade for high-performance or aging engines, allowing you to fine-tune oil pressure to your exact requirements without the trial and error of shimming standard springs.

Product Specs

• Compatibility: All BMC A-Series and B-Series engines
• Application: Mini, MGB, MG Midget, AH Sprite, Morris Minor, A35, A40, Riley 1.5, and more
• Design: External adjustment via set screw for "on-the-car" tuning
• Function: Replaces the fixed standard plunger and spring setup

What’s Included in the Kit?

• Heavy-Duty Cap & Washer: Ensures a leak-free seal.
• Set Screw & Locking Nut: For precision external adjustment.
• Internal Spring & Spring Locator: Keeps the spring perfectly centred.
• High-Spec Plunger: Precision-machined for smooth movement and reliable relief

Why Choose This Adjustable Kit?

• Precision Tuning: Easily increase or decrease oil pressure to compensate for high-volume pumps or bearing wear.
• No More Shimming: Eliminate the hassle of using washers to "pack" standard springs; simply turn the set screw.
• Stable Pressure: The included spring locator prevents "spring buckle," ensuring consistent pressure relief throughout the rev range.
• Essential for Competition: A "must-have" for race and rally engines where maintaining optimal oil pressure is critical for longevity.

Installation Tip: We recommend adjusting the valve while the engine is at full operating temperature to ensure your hot oil pressure meets your engine builder's specifications.

[Adjustable oil pressure relief valve kit for A series and B series engines.]

[Kit Includes:

-Cap and washer

-Set screw and nut

-Spring locator

-Spring

-Plunger]

[Suitable for: Mini, Sprite, Midget, MGB, A35, A40, A50, Riley 1.5, Wolseley, Morris Minor etc.]