Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1987S10/T10 P/U 4WD V6-173 2.8LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGSERVICE AND REPAIREXERCISE SYSTEM
1987 Chevrolet S10/T10 P/U 4WD V6-173 2.8L
Exercise System
1987 Chevrolet S10/T10 P/U 4WD V6-173 2.8LSECTION Exercise System
PERIODIC USE
An important fact most owners ignore is that A/C units must be used periodically. Manufacturers caution that when the air conditioner is not used regularly, particularly during the cold months, it should be turned on for a few minutes once every two or three weeks while the engine is running. This keeps the system in good operating condition.
Checking out the system for the effects of disuse before the onset of summer is one of the most important aspects of A/C servicing.
CONDENSOR CLEANING
First clean out the condenser core, mounted in all cases at the front of the radiator. All obstructions, such as leaves, bugs or dirt, must be removed, as they will reduce heat transfer and impair the efficiency of the system. Make sure the space between the condenser and the radiator also is free of foreign matter.
EVAPORATOR OUTLET
Make certain the evaporator water drain is open. The evaporator cools and dehumidifies the air before it enters the passenger compartment; there, the refrigerant is changed from a liquid to a vapor. As the core cools the air, moisture condenses on it but is prevented from collecting in the evaporator by the water drain.
An important fact most owners ignore is that A/C units must be used periodically. Manufacturers caution that when the air conditioner is not used regularly, particularly during the cold months, it should be turned on for a few minutes once every two or three weeks while the engine is running. This keeps the system in good operating condition.
Checking out the system for the effects of disuse before the onset of summer is one of the most important aspects of A/C servicing.
CONDENSOR CLEANING
First clean out the condenser core, mounted in all cases at the front of the radiator. All obstructions, such as leaves, bugs or dirt, must be removed, as they will reduce heat transfer and impair the efficiency of the system. Make sure the space between the condenser and the radiator also is free of foreign matter.
EVAPORATOR OUTLET
Make certain the evaporator water drain is open. The evaporator cools and dehumidifies the air before it enters the passenger compartment; there, the refrigerant is changed from a liquid to a vapor. As the core cools the air, moisture condenses on it but is prevented from collecting in the evaporator by the water drain.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.