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Start and warm up the engine to normal operating temp. Shut off engine and check oil and coolant temps. Drive to an area with minimal traffic, accelerate from 30 mph to 50 mph, then allow the vehicle to slow to 30 mph with the throttle closed. Repeat 10 or 12 times. this will seat the piston rings. Drive gently for the first 500 miles (no sustained high speeds) and constantly check your oil (rebuilds can burn a small amount of oil). At 500 or 600 miles, change the oil and filter. For the next few hundred miles, drive normally. Do not pamper or abuse it. After 2000 miles change oil and filter again.... your done. This is the break in procedure for 350's ... other motors might be different

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Q: How do you break in a rebuilt 350 Chevy?
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