Mastercool 58490 valve-core remover installer kit enables under-pressure service on R134a systems.
Mastercool 134a high-side 16mm connector for quick valve access during service.
Mastercool 134a low-side 13mm connector for efficient core work.
Mastercool standard valve-core shaft fits cores 0.210-36 for broad compatibility.
Mastercool JRA valve-core shaft M6 x 0.75 for reliable core removal.
Mastercool Eaton valve-core shafts 8mm and 10mm support Eaton cores.
Mastercool 58490 valve-core remover installer kit enables under-pressure service on R134a systems.
Mastercool 134a high-side 16mm connector for quick valve access during service.
Mastercool 134a low-side 13mm connector for efficient core work.
Mastercool standard valve-core shaft fits cores 0.210-36 for broad compatibility.
Mastercool JRA valve-core shaft M6 x 0.75 for reliable core removal.
Mastercool Eaton valve-core shafts 8mm and 10mm support Eaton cores.

Mastercool 58490 R134a Valve Core Remover/Installer Kit – Pressurized Service, Universal Core Coverage

All-in-one pressurized valve core service for R134a systems The Mastercool 58490 kit lets technicians remove and install...
Vendor: Mastercool
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£203.48
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Mastercool 58490 valve-core remover installer kit enables under-pressure service on R134a systems.

Mastercool 58490 R134a Valve Core Remover/Installer Kit – Pressurized Service, Universal Core Coverage

£203.48
Mastercool 58490 valve-core remover installer kit enables under-pressure service on R134a systems.
Mastercool 134a high-side 16mm connector for quick valve access during service.
Mastercool 134a low-side 13mm connector for efficient core work.
Mastercool standard valve-core shaft fits cores 0.210-36 for broad compatibility.
Mastercool JRA valve-core shaft M6 x 0.75 for reliable core removal.
Mastercool Eaton valve-core shafts 8mm and 10mm support Eaton cores.

Mastercool 58490 R134a Valve Core Remover/Installer Kit – Pressurized Service, Universal Core Coverage

£203.48
Description
Description
x

All-in-one pressurized valve core service for R134a systems

The Mastercool 58490 kit lets technicians remove and install valve cores without discharging the refrigerant. Equipped with a built-in shutoff and precise ball valve control, it supports service on live R134a systems with improved efficiency and reduced downtime.

Comprehensive compatibility for most R134a cores

Designed to cover a wide range of cores, the kit works with standard (0.210-36), JRA (M6 x 0.75), and Eaton-style (M8 and M10) valve cores. A selection of interchangeable shafts and port adapters expands coverage across many vehicle platforms, reducing the need for separate tools on the job.

  • Valve core remover/installer with shutoff valve
  • R134a high side connector (16 mm) and low side connector (13 mm)
  • Standard valve core shaft
  • GM large bore valve core shaft
  • JRA valve core shaft
  • Eaton low side shaft (8 mm) and Eaton high side shaft (10 mm)
  • GM/Ford high-side adapter fittings
  • Molded carrying case for organized storage

Durable, field-ready construction for professionals

Brass body, stainless steel ball valve, and hardened steel shafts give the kit a sturdy, reliable feel for daily shop use. The included molded case keeps all components neatly organized for transport between jobs or in the service bay.

  • Durable brass housing and stainless steel valve for durability
  • Interchangeable shafts and full adapter set for broad coverage
  • Original Mastercool design backed by decades of A/C service expertise
  • U.S.-based support and proven performance for a technician-first experience

What you gain on the job

This all-in-one kit is ideal for professionals who value time savings, reduced refrigerant loss, and compatibility across common R134a platforms. While results can vary by system and vehicle, the setup offers a practical approach to core servicing with built-in safety features and high-quality components.

FAQ

Q: What makes the Mastercool 58490 kit useful for R134a systems?

A: Removes and installs cores without discharging the system using a built-in shutoff valve and pressure control.

Q: Which valve cores are compatible with this kit?

A: Standard (0.210-36), JRA (M6 x 0.75), and Eaton (M8/M10) cores, plus multiple shafts and adapters.

Shipping & Return
Shipping & Return
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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Shipping

We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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