The Ford Barn - View Single Post - Thermostat -= Yes or No

steve s · 05-09-2013, 08:03 PM

Make sure that it has a 1/8 inch bypass hole drilled in the flange, so there is enough flow to allow the stat to sense the coolant temp and to prevent localized hot spotting in the head during warmup.

Some of us drill two bypass holes, just to be sure. Slows warmup somewhat but if you've ever seen explosive vaporization, you won't mind.

Steve

05-09-2013, 08:03 PM	#12
steve s Senior Member Join Date: May 2010 Location: Kalamazoo Posts: 1,656	Re: Thermostat -= Yes or No Make sure that it has a 1/8 inch bypass hole drilled in the flange, so there is enough flow to allow the stat to sense the coolant temp and to prevent localized hot spotting in the head during warmup. Some of us drill two bypass holes, just to be sure. Slows warmup somewhat but if you've ever seen explosive vaporization, you won't mind. Steve