Step-by-Step - Repairing a Radiator Overflow Tank

One of the great benefits of having the Mini-Weld Model 6 in your shop is that you can quickly repair cracked or broken polyethylene parts, like this radiator overflow bottle. This quick repair saved the cost of a new tank, and more importantly allowed the shop to deliver the car more quickly with no waiting for parts.

Here’s everything you need to repair a PE tank: 1000-A Super Clean plastic cleaner, a Dremel tool with the 6121-T teardrop cutter bit, the Mini-Weld airless plastic welder, and the 5003R4 polyethylene welding rod.
Step 1: Shoot on a heavy, wet coat of 1000 Super Clean plastic cleaner, let it sit for a few seconds, then wipe dry with a clean paper towel.
Step 2: V-groove the crack almost all the way though with the 6121-T teardrop cutter bit.
Step 3: Melt the 5003R4 PE welding rod together with the base material. Use welding tip to melt base and mix together with welding rod.

Products Used For This Repair

1000-A
Super Clean (aerosol)

$ 12.95

6121-T
Tear Drop Cutter Bit

$ 8.95

5600HT
Model 6 Airless Plastic Welder

$ 279.95

5003R4
Polyethylene Rod (30 ft.)

$ 15.95