Help please!!!!!!! Just come home in my classic '92 rangie, pulled onto drive and water comes gushing out of header tank. Slight leak off water pump but stopped last week with some leak stop. Have tried the heater and it is blowing hot. Taken expansion tank cap off , topped up fluid and ran engine, all seems well, no bubbles at tick over, but after revving the engine it bubbles slightly but then returns to normal. Dipped oil level, level correct and right colour, not grey and stodgy. Can somebody give me some pointers please, I am thinking that it could be a head gasket, is this right or am I panicking for no reason is it a much simpler fix?
Please help.
Barno.