Mastercool 58490 — Universal R12/R134a Valve Core Master Kit

Universal R12/R134a Valve Core Master Kit

Comprehensive professional valve core service kit for R12 and R134a automotive A/C systems. Features built-in ball valve design that prevents refrigerant loss during valve core service. Complete kit includes all necessary adapters and tools for servicing standard, GM large bore, and Eaton SSV service ports.

Key Features

• Built-In Ball Valve: Prevents refrigerant loss during service
• Universal Compatibility: Works with R12 and R134a systems
• Complete Kit: All adapters and tools included
• Professional Quality: Built to Mastercool standards
• Multiple Port Types: Standard, GM large bore, Eaton SSV
• Essential Tool: Must-have for automotive A/C service

Kit Contents

• Valve core remover/installer with built-in ball valve
• Standard R134a/R12 adapter
• 58490-378 — GM Large Bore valve core tool
• 58490-768 — Eaton R134a Low Side valve core tool
• 58490-002 — R134a High Side 16mm connector
• 58490-003 — R134a Low Side 13mm connector
• Replacement valve cores
• Carrying case

Technical Specifications

• Model: 58490
• Type: Universal valve core master kit
• Compatible Refrigerants: R12, R134a
• Port Types: Standard, GM large bore, Eaton SSV
• Built-In Ball Valve: Prevents refrigerant loss
• Barcode: 700376101140
• SKU: 58490
• HS Code: 84189910

Applications

• R134a automotive A/C service
• R12 legacy automotive A/C systems
• Valve core removal and installation
• GM large bore service ports
• Eaton SSV service ports
• Mobile service operations
• Workshop environments

Why Choose the 58490 Master Kit?

• No Refrigerant Loss: Built-in ball valve prevents loss during service
• Complete Solution: All tools and adapters in one kit
• Universal Compatibility: Works with all common port types
• Professional Standard: Essential for quality automotive A/C work
• Time Saving: No need to recover refrigerant for valve core service
• Cost Effective: Complete kit at professional price

Related Valve Core Products

Valve Core Master Kits:

• 58490 — Universal R12/R134a Valve Core Master Kit - This Product
• 58490-YF — Universal R1234yf Valve Core Master Kit
• 91337 — R12/R134a/R1234yf Valve Core Repair Kit

Individual Tools from This Kit:

• 58490-378 — GM Large Bore Valve Core Remover Tool
• 58490-768 — Eaton R134a Low Side Valve Core Tool
• 58490-002 — R134a High Side 16mm Connector
• 58490-003 — R134a Low Side 13mm Connector

Standard Valve Core Tools:

• 91490 — Standard Valve Core Remover Installer Tool
• 91496 — Valve Core Remover Tool HVAC Service
• 91498 — Universal Valve Core Remover Installer R410A

Replacement Parts:

• 91490-K — Replacement Tip & Pin for 91490/6/8

Valve Cores:

• 90377-20 — Standard Valve Core (20pcs)

Installation Kits:

• 90376 — Valve Core Removal Installation Kit 6 Cores

Perfect For

• Automotive A/C specialists
• Mobile service operators
• Workshop environments
• Professional service operations
• R134a system service
• R12 legacy system service
• Technicians servicing multiple vehicle types

Maintenance

• Keep Clean: Wipe tools clean after use
• Inspect Regularly: Check for wear or damage
• Replace Worn Parts: Use replacement tips and pins when needed
• Proper Storage: Store in carrying case when not in use

Professional Quality: Mastercool 58490 universal valve core master kit provides comprehensive valve core service capability for R12 and R134a automotive A/C systems with built-in ball valve design that prevents refrigerant loss. Complete kit includes all necessary adapters and tools for servicing standard, GM large bore, and Eaton SSV service ports.