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10/29/21, 2:55 PM
Article
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Volvo Chassis - Model VN - Crack At Corner Of The
Hood Air Intake; Repair Procedure
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Internal Content
Tools
Compact Pneumatic Rotary Tool
Pneumatic Sander
High Pressure Blow Nozzle
Pneumatic Spray Gun
; Live UI
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Supplies
West System® 105 Epoxy Resin
West System® 205 Fast Hardener
Fiberglass Cloth - Cut into 4"x4”
squares
Method Prerequisites – Procedure Steps
1. Crack Location – Detection
; Live UI
2. Surface Preparation – Composite digging-grooving
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3. Door opening method – Access to B-Side Fender
4. Fiber Glass Patch Preparation
5. Resin Preparation – Patch Impregnation
6. Repairing the back side of the crack damaged area
7. Repairing the A face-cosmetic of the crack damaged area
8. Drying – Polymerization (Leister blowing)
9. Sanding – P240 / P320 / P400 (Cosmetic Face)
10. Cleaning (Blowing – IPA Wiping)
11. Puttying of the cosmetic A face (Product Prep + Application of
putty)
12. Sanding – P240 (if needed) P320 / P400 (Cosmetic A Face)
13. Cleaning PRTP Prep (Blowing – IPA Wiping - Deionization)
14. Primering – PRTP
15. Curring (oven sequence)
Crack Location (Air Intake Area)
1. Determine
the location and path of the crack
UI
; Live
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A. Use a sand paper to remove all surface coating from the affected area
2. Prepare the surface for patching
Removed the damaged material and open up the cracks, use a
medium grit sandpaper to sand slightly into the surrounding area.
This will give you the ability to feather your repair into the
undamaged surface. After you’ve finished sanding the surface, wipe
down the surface with acetone one final time to remove dust and
anything else that may disrupt adhesion.
Digging the SMC Surface and
Grooving
Grooving shape (Taper/Cove
Groove)
; Live UI
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Crack has to be in the center of the
crossed grooves created
Article
Create a Taper/Cove groove, not
a V-grove
Door opening method – Access to B-Side Fender
Cutting the Fender reinforcement on Access to the B side Fender by
3 faces to create a visit window
the window – Access to
(4”x5”) to access to B side fender proceed to the repair on B side
; Live UI
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Fiber Glass Patch Preparation 4”x4”
; Live UI
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GF Patch 4” X 4” type cannot be changed
Resin Preparation – Patch Impregnation
Epoxy Resin + Hardener (1/5
ratio)
GF Patch 4”x4” Impregnation)
Repairing the back side of the crack damaged area
Impregnated Patch Setting up
Impregnated Patch Location
(2 Patches impregnated and
superposed)
(2 Patches impregnated and
superposed)
; Live UI
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Repairing the A Face-cosmetic of the crack damaged area
Impregnated Patch Setting Up
After 2 minutes apply a paper tape on the wet patch to avoid sags and
get a smooth surface
Drying - Polymerization
; Live UI
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Leister (heat gun) need to be swept over the patch during 3 minutes
(more if not cured) and with respect of the right distance to the subtract
and the right Leister (heat gun) heating power
Sanding of resin patch – P80 / P240 / P320 (Cosmetic Face)
Sanding Method
Type of sand paper
; Live UI
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