Why won't my Corvair start or stay running?

Short answer: If a Corvair won't start right after valve-cover or pushrod tube work, the valve adjustment is the first suspect. If it starts but won't stay running, check the points, ballast resistor, coil and fuel pump.

Symptom: It cranks but won't fire after engine work, or starts and dies once warm.

What to check first

1. If it followed pushrod seal work, recheck the valve adjustment using the manual's lifter preload.
2. Make sure the fan belt is on and tight. The Corvair's air cooling depends on it.
3. Check the points gap and the ballast resistor.
4. Check the coil is the right type and not overheating.
5. Check for fuel at the carburetors while cranking.

Likely causes

1. Valves adjusted too tight. After pushrod tube seal work, the hydraulic lifters must be set correctly. Too tight and the valves don't close, so there's no compression.
2. Worn points or bad ballast resistor. The points time the spark and the ballast resistor drops voltage to the coil. If either fails, spark is weak or cuts out once warm.
3. Wrong or failing coil. A coil not matched to the resistor setup overheats and cuts out.
4. Fuel pump or its pushrod. The mechanical pump is driven by a pushrod; a worn pump or rod stops fuel supply.

What it usually costs

Owners didn't post prices. Ignition parts are cheap; specialist Corvair shops are few, so call around for quotes.

Is it safe to keep driving?

A Corvair that stalls in traffic is a hazard, and running without the fan belt overheats the air-cooled engine quickly. Fix it before driving.

DIY or shop?

Valve adjustment and ignition work are DIY with the manual. Corvair clubs are a strong resource.

Recalls, bulletins and complaints in plain words

• Recalls: NHTSA lists 4 recall(s) for the Chevrolet Corvair in these years, and none match this problem. Check your VIN at nhtsa.gov/recalls. If your car is part of a recall, the dealer fixes it for free.
• Plain words: These cars predate most of NHTSA's online data, so owner experience carries most of the weight.
• NHTSA complaints: 1 keyword-matched complaints for Chevrolet Corvair 1960–1969 (of 1 unique complaints queried, NHTSA complaints API by model year, queried 2026-10-28; keywords: start, stall, knock, die, fuel) (NHTSA returned no data for 2 model-year queries). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In Corvair knocks but doesn’t start on Car Talk, a 1965 Corvair wouldn't start after the owner replaced the pushrod tube seals. Members said to recheck the valve adjustment, setting the lifter preload by turning one turn past zero lash as the manual says, and also to check the fan belt.
• In Chevrolet Corvair Failure to Stay On by Itself on Car Talk, a 1967 Corvair wouldn't stay running. Members pointed to the points, the ballast resistor, using a coil rated for the setup and heat, and the fuel pump and its pushrod.

Quick tip

Recheck the last thing you touched first. Most 'it won't start after the job' problems are in the job.

Vehicle focus: Chevrolet Corvair, 1960-1969.

Safety / mechanic note

Never run the air-cooled engine without the fan belt. Verify with a mechanic.