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 MANUALSCHEVROLET1982CHEVETTE L4-98 1.6LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSEXHAUST GAS RECIRCULATIONTHERMAL VACUUM VALVETESTING AND INSPECTIONEGR-TCV
1982 Chevrolet Chevette L4-98 1.6L
EGR-TCV
1982 Chevrolet Chevette L4-98 1.6LSECTION EGR-TCV
- This valve is used on some engines in the vacuum line to the EGR valve.
- The valve is closed below 61° F to block the vacuum to the EGR valve permitting better cold engine operation.
- The valve is open above 76° F permitting normal EGR operation.
- If vacuum is present at the EGR valve when engine coolant temperature is below 61° F, or there is no vacuum present when temperature is above 76° F, replace the valve.
NOTE: Refer to the number stamped on the base of the switch or valve for calibrated switching or activation temperatures.
- The valve is closed below 61° F to block the vacuum to the EGR valve permitting better cold engine operation.
- The valve is open above 76° F permitting normal EGR operation.
- If vacuum is present at the EGR valve when engine coolant temperature is below 61° F, or there is no vacuum present when temperature is above 76° F, replace the valve.
NOTE: Refer to the number stamped on the base of the switch or valve for calibrated switching or activation temperatures.
RENDER: 1.0x
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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.