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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1986C 10 P/U 2WD V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSEXHAUST GAS RECIRCULATIONEGR VALVESERVICE AND REPAIR
1986 Chevrolet C 10 P/U 2WD V8-350 5.7L
EGR Valve: Service and Repair
1986 Chevrolet C 10 P/U 2WD V8-350 5.7LSECTION Service and Repair
REMOVE OR DISCONNECT
1. Air cleaner.
2. EGR valve vacuum hose at valve.
3. Bolts.
4. EGR valve and gasket from manifold, discard gasket.
INSPECTION
If the EGR passage indicates excessive build up of deposits, the passage should be cleaned. Care should be taken to ensure that all loose particles are completely removed to prevent them from clogging the EGR valve of from being ingested into the engine.
CLEANING
1. With a wire wheel, buff the exhaust deposits from the mounting surface and around the valve.
2. Look for exhaust deposits in the valve outlet. Remove deposit build up with a screwdriver.
3. Clean the mounting surfaces of the intake manifold and valve assembly.
CAUTION: DO NOT wash the EGR valve in solvents or degreaser as permanent damage to the valve diaphragm may result. Also, sand blasting of the valve is not recommended since this can affect the operation of the valve.
INSTALL OR CONNECT
1. New EGR gasket.
2. EGR valve onto manifold.
3. Bolts.
4. Vacuum tube to EGR valve.
5. Air cleaner assembly.
6. Check operation of EGR system to ensure correct operation.
1. Air cleaner.
2. EGR valve vacuum hose at valve.
3. Bolts.
4. EGR valve and gasket from manifold, discard gasket.
INSPECTION
If the EGR passage indicates excessive build up of deposits, the passage should be cleaned. Care should be taken to ensure that all loose particles are completely removed to prevent them from clogging the EGR valve of from being ingested into the engine.
CLEANING
1. With a wire wheel, buff the exhaust deposits from the mounting surface and around the valve.
2. Look for exhaust deposits in the valve outlet. Remove deposit build up with a screwdriver.
3. Clean the mounting surfaces of the intake manifold and valve assembly.
CAUTION: DO NOT wash the EGR valve in solvents or degreaser as permanent damage to the valve diaphragm may result. Also, sand blasting of the valve is not recommended since this can affect the operation of the valve.
INSTALL OR CONNECT
1. New EGR gasket.
2. EGR valve onto manifold.
3. Bolts.
4. Vacuum tube to EGR valve.
5. Air cleaner assembly.
6. Check operation of EGR system to ensure correct operation.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.