COMP Cams Engine Crankshaft Turning Socket Tool

COMP Cams Crankshaft Turning Socket Tools: Precision Built for Serious Engine Builders

When building or degree-checking an engine, few tasks are more fundamental — or more frequently botched with the wrong tool — than rotating the crankshaft assembly. COMP Cams, widely recognized as the absolute leader in valvetrain technology, brings that same engineering discipline to their line of engine crankshaft turning socket tools. These are not generic sockets repurposed for engine work; they are purpose-designed instruments built specifically for the crankshaft snout.

Purpose-Engineered for the Crankshaft Snout

COMP Cams crankshaft turning sockets are precision-machined for an accurate fit over the crankshaft snout of specific engine families. The lineup covers widely used platforms, including the Chevrolet Small Block (part 4793CPG) and Chevrolet Big Block (part 4797, featuring a 1.610" ID with a 3/16" keyway), ensuring the socket seats securely without slop or risk of damage to the snout.

Each socket is designed to accept a standard 1/2" drive ratchet or breaker bar, giving builders the leverage and control needed to rotate a tight engine assembly during cam degreeing, TDC verification, or valve timing checks. This compatibility with common shop tools means no specialized adapters are required — just slip it on and get to work.

The Integrated Degree Wheel Feature

What sets COMP Cams crankshaft sockets apart from a simple turning tool is their integrated degree wheel mounting system. A knurled retaining nut threads onto the socket to sandwich a degree wheel firmly against the crank snout. Critically, that nut can be loosened while the socket remains on the crankshaft, allowing the degree wheel to rotate independently of the engine — an essential capability when zeroing the wheel to find true top dead center (TDC) without disturbing crank position.

This thoughtful design reflects COMP Cams' broader engineering philosophy. As a member of the Edelbrock Group and a company that pioneered technologies like the Spintron engine testing system and Pro Plasma Nitriding for camshafts, COMP Cams understands that accurate cam timing starts with the right setup tools — not just the right cam.

Why COMP Cams for Engine Building Tools?

COMP Cams has been producing performance engine components since 1976, and their tool offerings stem from the same exacting standards applied to their camshafts, valvesprings, and lifters. Their crankshaft sockets are a natural extension of a complete engine-building ecosystem — designed to work seamlessly alongside COMP's own degree wheels and rotating assembly tools. Builders who already trust COMP Cams for their valvetrain components can be confident that these tools meet the same fit and finish standards.

• Precision-machined for accurate, application-specific fit over the crankshaft snout
• Accepts standard 1/2" drive ratchets and breaker bars
• Knurled retaining nut holds degree wheel in place during setup
• Nut can be loosened on the snout to rotate degree wheel independently for TDC finding
• Available for Chevrolet Small Block, Big Block, and additional platforms
• Backed by a 1-year limited warranty

Whether you're a professional engine builder or an enthusiast tackling a first cam swap, COMP Cams crankshaft turning socket tools provide the accuracy and confidence that precise engine timing demands.