I seem to remember someone telling me to drill a small hole or two in my thermostat prior to reinstalling it. Sadly, I can't remember any of the details of size, location, or the reason for doing it. Please refresh my memory. Thanks
Mike Burns 1940 Chev 1/2 ton 1953 Chev 1/2 ton 1950 Studebaker Starlight Coupe 1947 Indian Chief 1943 Indian 741
PS- There are several others, but this one is earlier than most.
~ Dan 1951 Chevy 3 window 3100 Follow this story in the DITY Gallery "My Grandpa Carl's Truck and How it Became Mine" 1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
Some thermostats have a "jiggle pin" that allows air to vent while the cooling system is being filled, and closes the hole off as coolant starts to flow when the water pump starts it circulating. Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
I drilled a 3/32” hole in mine. It purged the air out of the system and doesn’t seem to effect the cooling whatsoever.
Last edited by Phak1; 04/26/202311:30 PM.
Phil Moderator, The Engine Shop, Interiors and Project Journals
1952 Chevrolet 3100, Three on the Tree, 4:11 torque tube Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum
