The engine may have run with old gasoline, the gas starts to varnish as some of the more volatile vapors evaporate and leaves behind a sticky mess. if the engine ran on old gas, the valve stems and guides collect the varnish and it seizes the stem in the guide.
Last edited by Phak1; 01/06/2026 1:34 PM. Reason: Spelling correction
1957 Chevrolet 5700 LCF 283 SM420 2 speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto, 1978 Yamaha DT175, 1999 Harley Davidson Softail Fat Boy
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