A lot of heads are cracked by air pockets upon first coolant fill. A 1/8" hole drilled in the thermostat helps alleviate this problem.


"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.