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homemade87 · 02-27-2018, 08:35 AM

What you have is not the coolant leak problem prone from the 706 heads . The 706 will crack around the center head bolts under the valve cover and put water in the crank case . Seems you have already eliminated it as a problem

You have a different problem . Either the exhaust bolt was to long and bottomed out and cracked the head or it may have froze or previous owner did something .

I would keep an eye on it . Once it heats up and is pressurized it may push some fluid out . If the crack is internal as well it could fill the cylinder as well and hydraulic and do some damage .

02-27-2018, 08:35 AM	#3
homemade87 Registered User Join Date: Apr 2010 Location: Guntersville Alabama Posts: 1,073	Re: Dreaded 5.3 coolant leak? What you have is not the coolant leak problem prone from the 706 heads . The 706 will crack around the center head bolts under the valve cover and put water in the crank case . Seems you have already eliminated it as a problem You have a different problem . Either the exhaust bolt was to long and bottomed out and cracked the head or it may have froze or previous owner did something . I would keep an eye on it . Once it heats up and is pressurized it may push some fluid out . If the crack is internal as well it could fill the cylinder as well and hydraulic and do some damage .