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first,lets make sure there is no air in the cooling system...remove the radiator/reservoir cap when the engine is cold...start the engine and let it idle...keep coolant on hand and add when needed..some coolant may gush out with air when doing this so be careful....keep doing this until engine is at operating tempeture and the coolant evens out and quits gushing..then ,install the cap...let it sit and idle to see if the radiator fan comes on..if the engine got really hot,it is possible that it blew a head gasket or even cracked a head
sorry to say...but.it sounds as if the head gasket may be blown
How big a job is replacing a blown head gasket?
well..it is a fairy big job....what is your engine size and i will try to send you step by step directions
this may help
See Figures 8 through 19
FIG : Fig. 8: Exploded view of the cylinder head assembly for the 2.0L engine
the 2.0L engine
Fig. Fig. 9: To remove the cylinder head, first drain the coolant, then remove the air intake ducting, valve cover, distributor and radiator hose
Fig. Fig. 10: Also disconnect the water bypass hose ...
Fig. Fig. 11: ... as well as the engine wire harness, fuel lines (arrows) and heater hoses
Fig. Fig. 12: If necessary, unbolt the EGR pipe securing bracket from the engine block
Fig. Fig. 13: Remove the timing belt and camshafts from the cylinder head
Fig. Fig. 14: Loosen the cylinder head bolts evenly in 2-3 steps following the sequence
Fig. Fig. 15: Once all of the cylinder head bolts are loosened remove them along with their washers
Fig. Fig. 16: With the help of an assistant, lift the cylinder head off of the engine, complete with intake and exhaust manifolds
Fig. Fig. 17: Remove the old cylinder head gasket ...
Fig. Fig. 18: ... and, after stuffing rags in the cylinder bores, thoroughly clean the gasket mating surfaces
Fig. Fig. 19: When installing the head, tighten the head bolts in sequence to the proper specifications