egr MAZDA MX-5 1994 Service Manual

PLASTIC BODY PARTS 3. Sand the urethane around the damaged area with #36-#50 sandpaper to make it taper. A - A' B - B' Section C - C' 15-20mm (0.59-0.79 in) ............... 15-20mm (0.59-0.79 in) 15-20mm (0.59-0.79 in) 7 w 4 t+- 15-20mm (0.59-0.79 in) D - D' Section 4. Degrease the repair area (the face and the back) with an appropriate degreasing agent. Cover the hole or crack with aluminum tape on the reverse side of the damaged area. A - A' B - 8' Section C - C' I Aluminum tape Do not use thinners or other chemicals as damage to the surface will result. I Gartner Banana

PLASTIC BODY PARTS - 8. Sand the paint around the damaged area with #240 sandpaper to make it smooth. Degrease with appropriate A - A' degreasing agent I3 - 6' Section ,/ ,.. -. Caution Do not use thinners or other chemicals as damage to the surface will result. 9. Spray primer (heat drying) or primer surfacer (air drying) only on the effected area of the part. (Spot spraying) A - A' I3 - 6' Section C - C' D - D' Section 10. Dry the part. 1) Primer (Forced drying) Uniformly heat the repaired part. Heating condition: 80°C (176OF) (The temperature of the part) x 20 minutes Gartner Banana

PLASTIC BODY PARTS i- 2) Primer surfacer (Air drying) The time required for drying the applied part: Air drying [20° (68OF)l: about 8 hours Duration 11. Sand the area of the repair with #400-#600 sandpaper. If the surface of the urethane be comes visible, touch it up with primer or primer surfacer. 12. Degrease the part and spray on a top coat. Note Use paint suitable for urethane only. Normal body paint should not be applied to the flexible polyurethane fascia. If it is applied, it will not match the flexibility of the fascia causing the paint to crack or peel. Gartner Banana

PLASTIC BODY PARTS Procedure for Repairing Polypropylene Fascia Damaged paint Hole or crack through surface Crack more than 150mm (5.90 in) long or broken I I surface I I surface I I 1 I Fascia I 1 Fascia I not visible I I visible I 1 Smooth dakaged area I Remove paint Apply aluminum tape on reverse side or bum~er Weld damaged area I Rough sand damaged m Degrease damaged 1 area , 1 + Apply polypropylene primer to damaged area Apply repair filler to damaged area and dry , Sand damaged area and smooth I Apply polypropylene primer to damaged area and let dry 1 Spray primer surfacer on damaged area and dry I + + t Sand partial or complete surface of fascia I 1 1 1 Spray entire fascia surface with I polypropylene primer ( Spray primer surfacer on fascia and dry -- 4 1 Sand surface of fascia I I and smooth I -- - -- Degrease fascia I .) 4 4 4 Spray matching body color paint on fascia and dry Gartner Banana

PLASTIC BODY PARTS 2. Weld damaged area For repair of a cracked area, melt the crack together a heat gun and a special attach- ment. - B' section Melt area with heat gun C - C' Attachment Section after melting For repair of a hole, degrease the area and apply aluminum tape on the reverse side of the damaged area. A - A' Section Degrease surface ~lumin;m tape 3. Melt the polypropylene welding rod with a heat gun and deposit it in the cracked area. B - B' C - C' Section Welding rod (Polypropylene) / - - (Polypropylene) Melt this area Note a) Heat the shaded area to melt it. b)Take care not to excessively melt the welding rod. If the part is welded with the welding rod melted like jelly, the welding strength will be lowered. c) Hold the heat gun 10-20mm (0.39-0.79 in) away from the part that will be welded. d)Do not move the welding rod until the welded part cools. A - A' Section Welding rod (Polypropylene) Welding rod (Polypropylene) / I TOP view Tape Gartner Banana

PLASTIC BODY PARTS 7. Sand the area with #180-#240 sandpaper. . . Note a) If excessive force is applied to the area when sanding, the surface will not become smooth. b)lf there is fuzz around the repaired area melt it with a heat gun. 8. Degrease the painted surface. 9. Mix the primer and the hardener at a ratio of one to one. Apply primer to the repaired area and the surface of the fascia with a brush or spray. Polypropylene primer Primer hardener Use the primer within 16 hours after it is mixed. Note Polypropylene primer will dissolve even after drying if it is wiped with solvent. Use only water to clean. 10. Dry the part. Gartner Banana