my friends coolant boiled into the overflow and we replaced the head gasket twise and it still does it, idk what it could be but if find out lmk so i can fix my friends. gl, bump
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1994 F-150-Gave Away.
1989 240sx-SOLD.
1995 Civic Sedan-SOLD.
2003 Yamaha R6-SOLD.
1991 Mr2 Turbo-SOLD 
1999 Mazda 626-TRADED.
1991 Integra-SOLD.
1989 Civic Hatchback SI-SOLD.
1991 Mr2 Turbo-DD.