i have a 1993 honda civic with a b16 motor few bolts car running good running cause its not tune. my problems is when at top end coolant over flow fills up. but like i said i have no other signs of a head gasket no smoke except for black smoke at top end no bubbles in the coolant or over heating not burning oil. do anyone know what the problem might be.

 

Headgasket. Do a compression test.

 

dam i did not want to hear that on monday ill have a leak down test performed