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44
Cooling System Service Equipment
MV4508 Universal Cooling System Adapter
The MV4508 Universal Cooling System Adapter is simple and quick to install in virtually any
radiator or coolant reservoir neck. The rubber, step-and-cone design features a self-locking,
nested cam* and internal restrictor* that combine to provide a secure, airtight seal with only
a single rotation of the expansion knob. The unique adapter is fully self-contained -- no
component change is required -- so there are no extra parts to maintain. Also, its compact
size allows for convenient storage in a toolbox. The MV4508 is an economical alternative to
application-specic adapters. It ts pressure pumps with a common radiator neck-style
connection and replaces more than 20 individual adapters used to pressure test the cooling
systems on cars, vans and light- and heavy-duty trucks.
*Patent pending feature
Features:
• Replaces more than 20 individual cooling
system pressure test adapters for cars,
vans, light- and heavy-duty trucks
• Patent-pending cam mechanism helps to
ensure an air-tight seal with radiator and
coolant bottle necks
• Compact one-piece design ts
conveniently in tool box
• Compatible with Stant-style cooling
system pressure pumps
Includes:
• Universal Radiator Test Adapter (1-piece)
Specications:
Packaged Weight: 0.60 lbs (.27 kg)
Packaged Size: 2.6" x 2.4" x 6.7" (65 mm x 60 mm x 170 mm)
Application of the Universal Cooling System Adapter
The Mityvac Universal Cooling System Adapter utilizes a multi-step, expandable rubber
bushing design to adapt to the radiator and expansion tank ller necks on most domestic and
import automobiles. Each of the ve steps on the bushing has a unique diameter ranging
from ¾" (20 mm) up to 1½" (40 mm). The diameters are designed slightly smaller than the
most common ller neck sizes so that the adapter easily installs into the ller neck until the
largest possible diameter ts with only slight interference (Fig. 1). The tension knob is then
rotated causing the bushing to expand and securing the adapter in the neck (Fig. 2). Once
properly installed, the adapter forms an airtight seal with the radiator or expansion tank, and
can be utilized for vacuum, pressure or temperature related diagnostics as well as evacuating
and relling coolants while eliminating air locks.
The Mityvac Universal Cooling System Adapter will not t every automotive radiator and
expansion tank available. However, it can be used in conjunction with many specialized
adapters. If the sole intended use of the universal adapter is for a specic or unique
application, please verify the size and depth of the application to ensure proper t.
MV4508
3. Attach pump 4. Pressurize system
Operate pump to achieve
system pressure. Observe
gauge and inspect for leaks.
1. Insert adapter
Thoroughly wipe inner diameter of ller
neck or expansion bottle with a clean
shop rag to remove any coolant residue.
2. Expand adapter
While holding the bottom knob, rotate
the top knob of the adapter clockwise
until rubber fully engages the interior wall
of the ller neck. Pull up on the adapter
with reasonable force to ensure it holds
rmly in place.
(40 pages)
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