exhaust

EGR Valve

for 1966 Chevrolet Corvette 327ci V8 · RWD

Editorial review:Chris Hackleman — Master Technician · 20+ years · Jeff Moore — Master Lexus & Toyota Mechanic · 20+ years

Difficulty

Expert

Time

1.8 h

Tools

Steps

✓Expert-verified. Personally reviewed and approved by OLP's master technicians (Chris Hackleman & Jeff Moore — 20+ years each). Always follow the vehicle's factory service information and torque specs.

This procedure addresses a non-existent component on a 1966 Corvette 327 V8. EGR (Exhaust Gas Recirculation) systems were not introduced until the early 1970s for emissions control.

Warnings

⚠The 1966 Chevrolet Corvette 327ci V8 was not equipped with an EGR valve from the factory. EGR systems were introduced in the early 1970s as emissions control technology.

ℹ️If an EGR valve has been added as part of an aftermarket emissions conversion or engine swap, this procedure cannot be completed without specific information about that custom installation.

Preparation

Verify that the vehicle actually has an EGR valve installed - check the intake manifold and exhaust routing for any aftermarket EGR components
If performing an emissions upgrade or installing an EGR system for the first time, consult appropriate conversion kit documentation

Procedure

1
Confirm EGR System Presence
Inspect the engine bay and intake manifold for any signs of an EGR valve or related emissions components. The factory 1966 327ci V8 uses a simple intake manifold without provisions for EGR mounting. Document any custom or aftermarket installations present.
2
Identify Installation Type
If an EGR system is present, identify whether it is a bolt-on aftermarket kit, part of an engine swap, or a custom fabrication. Note the valve location, mounting method, and vacuum line routing for reference during reinstallation.

Reassembly

This procedure cannot be completed as specified because the 1966 Corvette 327 V8 does not have a factory EGR valve

Verification

Confirm with vehicle documentation or visual inspection whether an EGR system was ever installed on this vehicle
If replacing an aftermarket EGR valve, verify vacuum operation and check for exhaust leaks at all connection points

🔧Stuck on this egr valve? Take it to The Diag Desk.A human with 20+ years in the bay answers about YOUR Chevrolet within 24 hours — never AI. $25, and you're not charged unless you get an answer.Ask a tech →