Figure 3-14. Uni-tester.

mate with the sides of the header for soldering.

NOTE

Be sure that "V" tank does not extend over header

bolt holes.

(d) Clean along edge of header with muratic acid

and wire brush. After cleaning, wash with clear water

Figure 3-15 illustrates a "V" test tank.

Figure 3-15. Temporary "'V" test tank.

Figure 3-14. Uni-tester.

(2)

Installation

(a) Clamp one side of "V" tank to the

(5) Leak test core and make necessary repairs.

corresponding side of the header with vise-grip sheet

(6) Check radiator tank-header alinement by

metal pliers.

trial-fitting tank in proper position for bolting on.

(b) Apply flux and tinning mixture along edges of

(7) Lift off tank and apply gasket cement to tank

clamped "V" test tank. A small section at a time may be

and

header

surfaces.

Install

manufacturer's

clamped and soldered. Clamps are then moved until both

recommended gasket If gasket is not available, cut from

edges of tank have been soldered. Leave both ends of

sheet stock.

test tank open.

(8) Place gasket and tank in place and bolt on.

Tighten bolts alternately to prevent warping header or

center line at the "V" crease for a distance of 2 or 3 inches.

tank. Replace with new bolts if necessary.

Overlap the cut ends and form to fit ends of header.

(9) Retest radiator for leaks using proper air

(d) Solder these overlapped ends together and

pressure.

then solder ends to header. The core is now ready for air

d. Combined Solder-On and Bolt On Type Tanks.

testing. Figure 3-16 shows temporary "V" test tank being

Some radiators have bolt-on tanks and solder-on top

installed.

tanks. With this type, only one test tank is necessary. If

both tanks are bolt-on and are removed, two test tanks

must be used. One will require the installation of an air

connection. The air connection is made by punching or

drilling a 5/16 inch hole in one of the test tanks. Solder a

short length of 5/16 inch copper tubing to the hole.

e. " V" Test Tank:

(1) Construction.

(a). Cut a strip of 16 oz sheet copper large

enough to cover the header to the outer edge and allow for

an overlap. The overlap dimensions will depend on size of

header. Allow enough overlap to form a slight "V" above

Figure 3-16. Temporary "V" test tank being installed.

the header water passages. One or two inches will usually

be enough overlap for this purpose.

(b) Form a lengthwise "V" crease at the center of

the strip.

3-13