Removing and Replacing Overflow Pipes

NOTE

The 90 bends provide reinforcement to the .neck base

(2) The flat section of the copper patch is

soldered to the tank. See Figure 3-27 for an

illustration of a repair to an inlet neck.

Figure 3-26. Header repair using a notched patch (before

Figure 3-27. Inlet neck repair.

soldering).

3-39.

Major Core Repairs

3-37.

Removing and Replacing Overflow Pipes

a. Straightening. A bent radiator core can be

a. Heat overflow pipe with the needle flame of a

straightened provided the bend is gradual, but not if it is so

torch.

sharply kinked that the water tubes or passages are

b. When the solder becomes plastic, reach down

collapsed.

into the filler neck with fingers and push pipe out past

(1) Straightening is done best in a press (9, fig

tinned portion, then, from the outside, pull it free.

2-1) with boards above and below the core to spread the

pressure and protect the air fins.

NOTE

(2) If no press is available, place the core

between boards on a flat surface and hammer the upper

If overflow pipe is pulled first, it will probably break.

board to force the core back into proper shape.

(3) A core that has been slightly sprung by an

c. Clean, tin, and flux end of pipe, and insert it in the

impact at the side may be straightened in a simple frame

filler neck.

such as that illustrated In Figure 3-28.

d. Putting the flame on Joint, touch pipe with a

(4) Fit both clamps loosely on the core at top

solder rod. When solder beings to flow into Joint, remove

and bottom header strips with the lever in the position

torch quickly and let solder harden. Unless the fusing

shown, and tighten the clamp bolts as far as they will go.

metal enters the joint, it will give little strength.

(5) To straighten the face of core remove core

e. Resolder lower end of overflow pipe securely to

and repeat operation with the clamps this time at each

lower tank or radiator side members, fastening. It with

side of the core.

clips where possible.

(6) The frame may be further used to straighten

a side thrust in the core. The clamp to which the lever is

3-38.

Radiator Opening Neck Repair

attached should be secured on a bench and the core

fastened In It with the high part of the thrust upward.

a. General. A crack at the base of filler neck, inlet

(7) Fasten the second clamp bolt until core is

neck or outlet neck may be repaired in the same manner

straightened.

as the foregoing, with the exception of shaping the copper

patch which is cut and formed for soldering to both the

NOTE

tank and the neck.

Removing the radiator tanks is not necessary

unless the tanks are damaged.

Repair Procedure

(1) Cut a number of slits along the center hole

radius and bend to a 900 angle for soldering to neck.

3-19