Chevrolet Sonic Repair Manual: How to Identify Plastic Parts
Plastic parts can be identified by the SAE code, which is usually found on the rear of the part, and/or by the characteristics of the plastic. Knowing the type of plastic aids in selecting the proper repair materials and in selecting the proper repair procedure.
Look for the SAE code stamped into the part.
- Code Found
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Match the code to those in the plastic identification chart to determine whether the plastic is thermoplastic or thermoset plastic, and whether the plastic is rigid or flexible. Refer to Plastic Identification and Refinishing Systems.
- No Code Found
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Warning:
Do NOT use a plastic burn test to distinguish the type of plastic. The burn test produces vapors which are harmful.
Perform one or both of the following tests to determine if the part is thermoplastic polyolefin or thermoset non-polyolefin.
- Float Test
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- Cut a shaving of plastic from the back of the part.
The shaving should be free of mold release agents and paint.
- Place the shaving in a container of water.
- Thermoplastic polyolefin floats.
- Thermoset non-polyolefin sinks.
- Cut a shaving of plastic from the back of the part.
- Abrasion Test
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- Sand a spot near the damaged area with Grade?€‰36 Roloc Disc.
- Thermoplastic polyolefin material melts or frays when sanded.
- Thermoset non-polyolefin material sands cleanly.
Thermoplastic and thermoset plastics can be either rigid or flexible. Thermoplastic plastic parts are best repaired with a hot iron plastic material-feed welder, but are usually replaced. Thermoset plastic can be repaired with epoxy or other more rigid 2 package repair material.
For general repair instructions, refer to General Plastic Repair.
General Plastic Repair
Warning: In order to reduce the risk of personal injury when exposed
to toxic fumes while grinding, cutting, or applying repair material on any type
of sheet molded compound or RIM rigid plas ...
Plastic Collar Quick Connect Fitting Service
Removal Procedure
Warning: Refer to Gasoline/Gasoline Vapors Warning.
Note: There are several types of plastic collar fuel and evaporative
emission quick conne ...
Other materials:
Roof Rail Front Assist Handle Replacement
Roof Rail Front Assist Handle Replacement
Callout
Component Name
1
Roof Rail Front Assist Handle Fastener (Qty:?€‰2)
Caution: Refer to Fastener Caution.
Procedure
Fold the assist handle downward ...
Brake Assist System Description and Operation
System Component Description
The brake assist system consists of the following:
Brake Pedal
Receives, multiplies and transfers brake system input force from driver.
Brake Pedal Pushrod
Transfers multiplied input force received from the brake pedal to the
v ...
Vehicle Yaw Sensor Learn
The yaw sensor does not require calibration often. Calibration of the yaw rate
sensor might be required after certain service procedures are performed. Some of
these procedures are as follows:
Electronic brake control module (EBCM) replacement
Multi-axis acceleration sensor replacement
...
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