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Old 02-27-2011, 05:46 PM   #126

The pressure and temperature is not even in the entire system. It's kind of like high and low pressure areas in the Earth's atmosphere.
It's all vented in the same place though isn't it? There is only about 5 lbs pressure in the coolant system on a Volvo. American cars in the1960-80s ran more coolant system pressure , some up to 15 psi, and nowadays more than that. They never "blew" freeze plugs. It'll take more than 5-20 psi to unseat a freeze plug.

Some need to realize that above 15-20 boost, is more than these engines were intended to do without some other mods. Screw in freeze plug would be one of these IMO.

Last edited by smokeyfan1000; 02-27-2011 at 05:59 PM..
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