Posted by Fritz Maurer on April 17, 2021 at 07:17:18 from (174.232.134.149):
I recently bought a 73 Ford L-series with a 331 gas engine. The truck has been idle since 1976 with 15,000 miles. The engine still turns but I have not tried starting it yet. I was concerned about valve springs being compressed for 45 years. Should I pull the heads and change the valve springs? Also, what about sodium filled valves? Should I toss those as well, if it turns out the engine is equipped with them? I know those in the racing circuit never liked them, and I wonder if they caused trouble to any extent in stock applications. Would like your opinions on this. Thanks, Fritz
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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