My car has a a miss? any and every ideas welcome please!!!!

[newbiedrifta]

I have a 1988 ca18de s13 i have just put new racing plugs in a week ago and it was running fine until the other night my thermostat failed and i think i may have over heated it. when i lift the radiator cap it bubbles and i have been told that is the tell tale sign of a blowen head gasket.Any ideas how to diagnose what the prob is please???? i dont know what to do..;.

Thanks heaps

From desperate newbie
Modified by newbiedrifta at 1:43 PM 5/14/2008

[WhiteKnight]

Have the radiator shop pressure test it.

[driftingmy240sx]

you need to pressure test the cooling system and find out if coolant is getting into the cylinders. if coolant is getting into the cylinders once the head is off you will need to measure it with a straight edge because if it is .003" warped nissan says to replace.