Valve Spring Compressor Large 15079 - Direct Action Lever

In this review of the ARES 15079 valve spring compressor the bottom line is simple: it is a practical, well-built hand tool for anyone who needs to compress valve springs on overhead valve engines and values visibility in tight spaces. The direct action compressor lever is the single biggest reason to buy, because it lets the user see valve spring retainers while working in difficult-to-reach areas. The tool includes two adapters to cover common retainer sizes and a wide jaw opening, making it versatile for light shop and at-home engine work.

Key Features

• Direct action compressor lever: gives better visibility of valve spring retainers so the operator can work accurately in tight or awkward locations.
• Two valve spring adapters: include sizes that fit retainers up to 1 in (25mm) and 1.2 in (30mm), covering common small and medium retainer sizes.
• Wide jaw opening: the 1.7 in to 5.7 in (45mm to 145mm) jaw span handles a range of cylinder head profiles and spring assemblies.
• Large throat clearance: 9.8 in (250mm) throat clearance provides room to position the tool around bulkier heads or components.
• Durable construction: customers report solid build quality that stands up to repeated use on small-block engines.

Who It's For

The ARES 15079 is aimed at home mechanics, hobbyists, and small shop technicians who work on overhead valve engines and need a hand-operated compressor that offers visibility and reach. It is especially useful for jobs like valve spring replacement on small engines, classic V8 heads such as Dodge 360 magnum examples cited by owners, and routine valve adjustments where access is limited.

It is less well suited to heavy production environments where hydraulic or bench-mounted compressors with greater leverage and repeatable lockability are required. Users who need maximum mechanical advantage or a locking mechanism for extended jobs should consider larger shop presses or dedicated fixtures.

Pros & Cons

Pros

• Good visibility during compression thanks to the direct action lever design.
• Versatile fit with two adapters that cover common retainer sizes up to 1.2 in (30mm).
• Wide jaw opening and generous throat clearance for handling varied heads and hard-to-reach retainers.
• Well built; customers praise the build quality and overall functionality.

Cons

• Some users report limited leverage compared with larger shop tools, which can make very stiff springs harder to compress.
• Tool lacks a dedicated lockability feature for holding compression during prolonged work on a valve train.

Specifications

Tool type	Hand valve spring compressor
Adapter sizes included	Up to 1 in (25mm) and 1.2 in (30mm)
Jaw opening	1.7 in to 5.7 in (45mm to 145mm)
Throat clearance	9.8 in (250mm)
Designed for	Overhead valve engines
Action type	Direct action compressor lever

Our Verdict

The ARES 15079 is a solid, value-minded valve spring compressor for DIY mechanics and small shops that need reach and visibility when working on overhead valve engines. Its adapter range and throat clearance make it versatile, and the direct action lever is the key convenience feature; those needing maximum leverage or locking during long procedures should look to heavier bench or hydraulic options instead.

Frequently Asked Questions

Will this fit most valve spring retainers?
The tool includes adapters that fit retainers up to 1 in (25mm) and 1.2 in (30mm), which covers most common small and medium retainers.

Can it be used on large V8 heads?
Yes, it can be used on many V8 heads thanks to the 1.7 in to 5.7 in jaw opening and 9.8 in throat clearance, but very heavy springs may require more leverage.

Does it include a warranty?
Yes, the tool is backed by the manufacturer's Performance Assurance Limited Lifetime Warranty and customer service support for parts or replacement.